目錄

1. maskView動(dòng)畫原理 ：遮罩
2. button倒計(jì)時(shí)閃爍解決
3. 改變從xib拖出來(lái)約束多糠，沒(méi)有動(dòng)畫效果解決辦法:添加 layoutIfNeeded
4. 去除導(dǎo)航欄底部1px橫線
5. UIWebView直接打開PDF文件
6. 改變StatusBar顏色
7. UICollectionView 和 UITableView 頂部留白處理
8. TableView底下多余的分割線去除
9. webView真正加載完成
10. UIButton 只有title的時(shí)候拗盒，把 title 靠左對(duì)齊
11. Restoration ID 和 UITableViewCell 的identifier的區(qū)別
12. UIButton 的 SEL 換成block
13. UIImage指定范圍內(nèi)拉伸 - 聊天氣泡背景圖
14. NSAttributeString設(shè)置文本位置居中伴箩、靠左
15. 打開系統(tǒng)相機(jī)、使用searchBarController等 標(biāo)題顯示英文解決
16. label 設(shè)置文字漸變色 [設(shè)置漸變色幾種方式]
17. 設(shè)置導(dǎo)航欄上返回圖標(biāo)和title為空
18. Could not load NIB in bundle 錯(cuò)誤。 nib文件存在整陌，找不到，原因是沒(méi)有選中 'Target Membership'
19. Mac OS 系統(tǒng)更新到了 high Sierra 瞎领，pod 不能用了 報(bào)錯(cuò)
20. 文本轉(zhuǎn)語(yǔ)音播放
21. present出來(lái)一個(gè)半透明的view controller
22. NSAspects 使用
23. UITextField 明文密文切換光標(biāo)位置不準(zhǔn)
24. UITextField 右對(duì)齊在末尾輸入空格不顯示
25. 禁用第三方鍵盤
26. OC計(jì)算字符串中字符個(gè)數(shù)(漢字2個(gè)字符泌辫，英文字母、數(shù)字九默、空格1個(gè)字符)
27. iOS 啟動(dòng)圖問(wèn)題
28. 簡(jiǎn)書生成圖片分享iOS實(shí)現(xiàn)
29. bundle name 和 bundle display name
30. Localizations中Resources中顯示0 files Localized
31. 獲取當(dāng)前系統(tǒng)語(yǔ)言
32. 打包上傳APP到iTunes connect時(shí)候出錯(cuò)震放。
33. UIPickerView UIDatePicker 分割線去除
34. 各一個(gè)有圓角的view添加陰影效果
35. 設(shè)置按鈕不可點(diǎn)擊狀態(tài)時(shí)的背景色，顏色有誤差驼修。原因是系統(tǒng)自動(dòng)加了層蒙版殿遂。
36. 自定義返回按鈕導(dǎo)致系統(tǒng)的右滑返回手勢(shì)失效
37. 隱藏導(dǎo)航欄
38. pop到上上一級(jí)vc
39. uitextfield輸入內(nèi)容過(guò)長(zhǎng)時(shí)候诈铛，字符不自動(dòng)左移問(wèn)題
40. 導(dǎo)航欄上添加視圖frame問(wèn)題
41. 同時(shí)重寫setter getter ，實(shí)例變量報(bào)錯(cuò)問(wèn)題
42. 選擇模擬器/真機(jī)，顯示no scheme
43. Xcode增加編譯環(huán)境 debug release 新增preProduct
44. UITextField光標(biāo)換成圖片
45. 封裝pod庫(kù)時(shí)帶上資源bundle
46. UISider滑動(dòng)和pan手勢(shì)滑動(dòng)沖突
47. 鍵盤彈起自動(dòng)上滑tableview
48. Cancle換成漢字『取消』
49. 日期格式化 https://www.cnblogs.com/Cristen/p/3599922.html
50. 已經(jīng)納入版本管理的文件，加入.gitignore不生效的問(wèn)題
51. git添加子模塊submodule
52. git移除子模塊
53. 去除main.storyboard
54. cell選中時(shí)峻厚，子視圖背景顏色受影響
55. didselected方法不管用

隨手記

1. maskView動(dòng)畫原理 ：遮罩

2. button倒計(jì)時(shí)閃爍解決

   • 把按鈕樣式設(shè)為custom而非system

   • 把下面代碼中注釋掉的兩行放開

     -(void)ticktack {
     
        __block int timeout = 59;
        dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
        dispatch_source_t _timer = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0, queue);
        dispatch_source_set_timer(_timer, dispatch_walltime(NULL, 0), 1.0*NSEC_PER_SEC, 0);
        dispatch_source_set_event_handler(_timer, ^{
            dispatch_async(dispatch_get_main_queue(), ^{
                if (timeout <= 0) {//倒計(jì)時(shí)結(jié)束，關(guān)閉
                            dispatch_source_cancel(_timer);
        //  self.sendCodeBtn.titleLabel.text = @"獲取驗(yàn)證碼";
                            [self.sendCodeBtn setTitle:@"獲取驗(yàn)證碼" forState:UIControlStateNormal];
                            self.sendCodeBtn.userInteractionEnabled = YES;
                            self.sendCodeBtn.enabled = YES;
                     } else {
            //     self.sendCodeBtn.titleLabel.text = [NSString stringWithFormat:@"%d秒后重新發(fā)送",timeout];
                            [self.sendCodeBtn setTitle:[NSString stringWithFormat:@"%d秒后重新發(fā)送",timeout] forState:UIControlStateNormal];
                            self.sendCodeBtn.userInteractionEnabled = NO;
                            self.sendCodeBtn.enabled = NO;
                                            timeout--;
                                        }        });
                         });
            dispatch_resume(_timer);
        }
     

3. 改變從xib拖出來(lái)約束焕毫，沒(méi)有動(dòng)畫效果解決辦法:添加 layoutIfNeeded

    [UIView animateWithDuration:0.5 animations:^{
        self.passwdLoginContainLeadingContain.constant = -ScreenWidth;
        [self.view layoutIfNeeded]; 
    } completion:^(BOOL finished) {
    }];
   

4. 去除導(dǎo)航欄底部1px橫線

    UINavigationBar *navBar = self.navigationController.navigationBar;
    [navBar setBackgroundImage:[UIImage new] forBarMetrics:UIBarMetricsDefault];
    [navBar setShadowImage:[UIImage new]];
   

5. UIWebView直接打開PDF文件

    NSURLRequest *req = [NSURLRequest alloc] initWithUrl:[NSURL urlWithfilePath:filePath]];
    webView.scalesPageToFit = YES;
    webView.loadRequest
   

6. 改變StatusBar顏色

    UINavigationBar *navBar = self.navigationController.navigationBar;
    _statusView = [[UIView alloc] initWithFrame:CGRectMake(0, -20, ScreenWidth, 20)];
    _statusView.backgroundColor = [UIColor colorWithRed:241/255.0 green:241/255.0 blue:241/255.0 alpha:1];
    [navBar addSubview:_statusView];
   

7. UICollectionView 和 UITableView 頂部留白處理

    self.automaticallyAdjustsScrollViewInsets = NO
   

8. TableView底下多余的分割線去除

   self.tableView.tableFooterView = [[UIView alloc] initWithFrame:CGRectZero];
   

9. webView真正加載完成

   webViewDidFinishLoad: 方法在頁(yè)面重定向的時(shí)候會(huì)被多次加載，用webView.isLoading判斷是否還在加載

10. UIButton 只有title的時(shí)候驶乾，把 title 靠左對(duì)齊

    btn.contentHorizontalAlignment = UIControlContentHorizontalAlignment.left
     //  btn.titleLabel?.textAlignment = NSTextAlignment.left 這句不管用
    

11. Restoration ID 和 UITableViewCell 的identifier的區(qū)別

• Restoration ID Preserving and Restoring State
  用于存儲(chǔ)和恢復(fù)應(yīng)用狀態(tài)邑飒。一個(gè)應(yīng)用進(jìn)入后臺(tái)，再進(jìn)入前臺(tái)顯示的還是之前的頁(yè)面级乐，優(yōu)化用戶體驗(yàn)
• Identifer 用于從xib或者故事版里創(chuàng)建一個(gè)實(shí)例

12. UIButton 的 SEL 換成block

@class QSBlockButton;
#pragma mark class QSBlockButton
typedef void(^ActionBlock)(QSBlockButton *);

@interface QSBlockButton : UIButton

@property (copy, nonatomic) ActionBlock block;

@end

@implementation QSBlockButton

- (instancetype)init {
    self = [super init];
    if (self) {
        [self addTarget:self action:@selector(touchAction:) forControlEvents:UIControlEventTouchUpInside];
    }
    return self;
}
- (void)touchAction:(id)sender{
    _block(self);
}

13. UIImage指定范圍內(nèi)拉伸 - 聊天氣泡背景圖

      UIImage *imgBack = [bkImg stretchableImageWithLeftCapWidth:0 topCapHeight:2];  
    

14. NSAttributeString設(shè)置文本位置居中疙咸、靠左

NSMutableParagraphStyle *paragraph = [[NSMutableParagraphStyle alloc]init];
paragraph.alignment = NSTextAlignmentJustified;
NSDictionary *dic = @{NSParagraphStyleAttributeName : paragraph]};

15. 打開系統(tǒng)相機(jī)、使用searchBarController等 標(biāo)題顯示英文解決：在info.plist中添加 Localized resources can be mixed 設(shè)為 YES

16. label 設(shè)置文字漸變色 設(shè)置漸變色幾種方式

    方式一 ：
    
    NSArray *gradientColors = @[(id)ColorFromRGB(0xff7f43).CGColor, (id)ColorFromRGB(0xff3609).CGColor];
    
    _titleLabel = [[UILabel alloc] init];
    self.titleLabel.text = title;
    self.titleLabel.font = [UIFont systemFontOfSize:12];
    [self.titleLabel sizeToFit];
    
    if (self.titleLabel.frame.size.width > self.rightView.frame.size.width) {
        self.titleLabel.frame = CGRectMake(0, 0, self.rightView.frame.size.width, self.rightView.frame.size.height);
    } else {
        self.titleLabel.frame = CGRectMake(self.rightView.frame.size.width -     _titleLabel.frame.size.width, (self.rightView.frame.size.height-_titleLabel.frame.size.height)/2, _titleLabel.frame.size.width, _titleLabel.frame.size.height);
    }
    
    [self.rightView addSubview:self.titleLabel];
    
    // 創(chuàng)建漸變層
    CAGradientLayer *gradientLayer = [CAGradientLayer layer];
    gradientLayer.frame = self.titleLabel.frame;
    gradientLayer.colors = gradientColors;
    gradientLayer.startPoint = CGPointMake(0, 1);
    gradientLayer.endPoint = CGPointMake(1, 1);
    
    NSArray *layers = self.rightView.layer.sublayers;
    NSMutableArray *murr = [NSMutableArray arrayWithArray:layers];
    
    for (CALayer *l in murr) {
        if ([l isKindOfClass:[CAGradientLayer class]]) {
            [l removeFromSuperlayer];
          }
    }
    
    [self.rightView.layer addSublayer:gradientLayer];
    
    gradientLayer.mask = self.titleLabel.layer;
    self.titleLabel.frame = gradientLayer.bounds;
    

17. 設(shè)置導(dǎo)航欄上返回圖標(biāo)和title為空

    self.navigationController?.navigationBar.backIndicatorImage = #imageLiteral(resourceName: "back").withRenderingMode(.alwaysOriginal)
    self.navigationItem.backBarButtonItem = UIBarButtonItem(title: "", style: .plain, target: nil, action: nil)
    

18. Could not load NIB in bundle 錯(cuò)誤唇牧。 nib文件存在罕扎，找不到，原因是沒(méi)有選中 'Target Membership'

    
    
    屏幕快照 2017-11-14 10.34.41.png

19. Mac OS 系統(tǒng)更新到了 high Sierra 丐重，pod 不能用了 報(bào)錯(cuò)：

    -bash: /usr/local/bin/pod: /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby: bad interpreter: No such file or directory
    

解決：重新安裝cocoapods ‘sudo gem install cocoapods’

屏幕快照 2017-11-14 16.35.29.png

重新安裝cocoapods完成

20. 文本轉(zhuǎn)語(yǔ)音播放

    let utterance = AVSpeechUtterance.init(string: "Hello,我覺(jué)得吧...")
    let synthesizer = AVSpeechSynthesizer.init()
    synthesizer.speak(utterance)
    

21. NSTimer后臺(tái)運(yùn)行

       - (void)viewDidLoad {
[super viewDidLoad];

_count = 10;

[[UIApplication sharedApplication] beginBackgroundTaskWithExpirationHandler:nil];

_timer =[NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(ticktock:) userInfo:nil repeats:YES];

[[NSRunLoop currentRunLoop] addTimer:_timer forMode:(NSRunLoopCommonModes)];

 }

    - (void)ticktock:(NSTimer *)sender {

if (_count > 0) {
    _count--;
    _label.text = [NSString stringWithFormat:@"%ld",_count];
    
    NSLog(@"%@",_label.text);
}
else {
    [_timer invalidate];
}
   }

21. present出來(lái)一個(gè)半透明的view controller

     DSBirthdayViewController *birthdayVC = [[DSBirthdayViewController alloc] init];
     birthdayVC.modalPresentationStyle = UIModalPresentationOverCurrentContext;
    [self presentViewController:birthdayVC animated:YES completion:^{
    }];
    

22. NSAspects 使用

    [NSAspects hookMethodForObject:people selector:@selector(drink) withOptions:(AspectPositionInstead | AspectOptionAutomaticRemoval ) usingBlock:^(void){
       NSLog(@"eat");
    } error:nil];
    

23. UITextField 明文密文切換光標(biāo)位置不準(zhǔn)

兩種解決方式： 1. 注釋中語(yǔ)句 2. if 里語(yǔ)句

企業(yè)微信截圖_0be30471-7ebc-4ff0-8d82-6ccf88f48dab.png

24. UITextField 右對(duì)齊在末尾輸入空格不顯示

     //1. 自定義TextField       
      // .h
     @interface MTTextField : UITextField
     @end
      //.m
      @implementation MTTextField
      - (instancetype)init {
          self = [super init];
          if (self) {
            [self addTarget:self
                            action:@selector(replaceNormalSpaceUsingNonbreakingSpace)
         forControlEvents:UIControlEventEditingChanged];
        }
        return self;
    }
    
    - (void)replaceNormalSpaceUsingNonbreakingSpace {
        UITextRange *textRange = self.selectedTextRange;
        self.text = [self.text stringByReplacingOccurrencesOfString:@" "
                                               withString:@"\u00a0"];
      [self setSelectedTextRange:textRange];
    }
    
    //2. 使用的時(shí)候
    [[MTObserve(cell.textField, text) skip:1] subscribeNext:^(NSString *x) {
        @strongify(self)
        NSString *text = [x stringByReplacingOccurrencesOfString:@"\u00a0" withString:@" "];
        self.modifyInfoViewModel.nickname = [text trim];
      }];
    

25. 禁用第三方鍵盤

      //全局禁第三方鍵盤
    - (BOOL)application:(UIApplication *)application shouldAllowExtensionPointIdentifier:(NSString *)extensionPointIdentifier
    {
          return NO;
    }
    
    //某個(gè)uitextfield禁第三方鍵盤  [原文](https://www.pixotech.com/ios8_third_party_custom_keyboard_compatibility/)
    #pragma mark - 禁用三方鍵盤
    - (BOOL)application:(UIApplication *)application shouldAllowExtensionPointIdentifier:(NSString *)extensionPointIdentifier
      {
      if ([extensionPointIdentifier isEqualToString: UIApplicationKeyboardExtensionPointIdentifier])
    {
      id responder = [self findFirstResponder];
      if ([responder isKindOfClass:[UITextField class]])
      {
          return NO;
      }
    }
    return YES;
    }
    
    id mt_firstResponder;
    
    -(id)findFirstResponder {
      mt_firstResponder = nil;
    [[UIApplication sharedApplication] sendAction:@selector(foundFirstResponder:) to:nil from:nil forEvent:nil];
    return mt_firstResponder;
    }
    -(void)foundFirstResponder:(id)sender {
      mt_firstResponder = self;
    }
    

26. OC計(jì)算字符串中字符個(gè)數(shù)(漢字2個(gè)字符腔召，英文字母、數(shù)字扮惦、空格1個(gè)字符)

      - (NSUInteger)textLength: (NSString *) text {
            NSUInteger asciiLength = 0;
            for (NSUInteger i = 0; i < text.length; i++) {
                  unichar uc = [text characterAtIndex: I];
                  asciiLength += isascii(uc) ? 1 : 2;
            }
            NSUInteger unicodeLength = asciiLength;
            return unicodeLength;
    }
    

    屏幕快照 2018-04-15 19.22.37.png

27. iOS 啟動(dòng)圖問(wèn)題

    1. 確認(rèn)各項(xiàng)配置都正確臀蛛，但是啟動(dòng)圖就是不出來(lái)。試試刪除app崖蜜，然后重啟手機(jī)???♂?浊仆。

    2. Gernal 配置 App Icon and Launch Images 一項(xiàng)時(shí)候。使用 Launch Image Source. 而不是 Launch Screen File 時(shí)候豫领。要把 4寸屏幕的啟動(dòng)圖也加上抡柿，不然會(huì)導(dǎo)致在 4寸屏幕手機(jī)上運(yùn)行時(shí)候，上下有黑色等恐。

使用 Launch Image Source. 而不是 Launch Screen File

屏幕快照 2018-04-26 下午4.57.44.png

28. 簡(jiǎn)書生成圖片分享iOS實(shí)現(xiàn)

// 內(nèi)容都放到textView里

#import "ViewController.h"
@interface ViewController ()
@property (weak, nonatomic) IBOutlet    UITextView *textView;
@end

@implementation ViewController

 - (void)viewDidLoad {
     [super viewDidLoad];
  }
  - (IBAction)action:(id)sender {

   UIImage *image = [self imageWithScreenContentsInView:_textView];            

                  UIImageWriteToSavedPhotosAlbum(image, self, @selector(imageSavedToPhotosAlbum:didFinishSavingWithError:contextInfo:), nil);

}


 //在指定的視圖內(nèi)進(jìn)行截屏操作,返回截屏后的圖片
-(UIImage *)imageWithScreenContentsInView:(UIView *)view
{
//根據(jù)屏幕大小洲劣，獲取上下文
    UIGraphicsBeginImageContext(_textView.contentSize);

 [_textView.subviews enumerateObjectsUsingBlock:^(__kindof UIView * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
    
      NSLog(@"\n=======%@=========\n",NSStringFromClass([obj class]));
          
      if ([NSStringFromClass([obj class]) isEqualToString:@"_UITextContainerView"]) {
        
        [obj.layer renderInContext:UIGraphicsGetCurrentContext()];
    }
}];


UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

return viewImage;
  }


- (void)imageSavedToPhotosAlbum:(UIImage*)image didFinishSavingWithError:(NSError*)error contextInfo:(void*)contextInfo{

   if(!error) {
       NSLog(@"合影已保存到相冊(cè)");
    }else{
      NSLog(@"合影保存失敗");
   }

  }

   @end

29. bundle name 和 bundle display name

• bundle name
  is folder name, where your app (including executable file and all resources) will be stored (Cool Program.app)。建議不要修改bundle name (http://blog.csdn.net/kkk0526/article/details/9198355)

• bundle display name
  is what will be shown on iPhone screen课蔬，即當(dāng)你安裝該app到iPhone上顯示的name囱稽。 (http://blog.csdn.net/kkk0526/article/details/9198355)

• Bundle Display name must correspond to Bundle name，即bundle display name和bundle name不能相差太遠(yuǎn)二跋。否則apple會(huì)拒絕你的app战惊。

30. Localizations中Resources中顯示0 files Localized

原因：這是因?yàn)榘裮ain.storyboard LaunchImage.storyboard 都刪除了。這時(shí)候想要添加國(guó)際化語(yǔ)言因?yàn)槭?所以添加不了扎即。

解決：暫時(shí)添加個(gè)LaunchImage.storyboard吞获，等國(guó)際化做好后况凉，就可以刪掉了。

31. 獲取當(dāng)前系統(tǒng)語(yǔ)言

  - (BOOL)isRightLanguages {
        NSString *current = [[NSLocale preferredLanguages] objectAtIndex:0];//當(dāng)前語(yǔ)言 h-Hans-CN 簡(jiǎn)體中文, zh-Hant-MO繁體中文, en-CN 英文
        NSArray *supports = [[NSUserDefaults standardUserDefaults]objectForKey:@"AppleLanguages"];
        BOOL is = NO;
        for (NSString *sub in supports) {
              if ([sub isEqualToString:current]) {
                    is = YES;
              }
        }
         return is;
    }

32. 打包上傳APP到iTunes connect時(shí)候出錯(cuò)衫哥。

    ERROR ITMS-90475: "Invalid Bundle. Your app supports Multitasking on iPad, so you must include the UILaunchStoryboardName key in your bundle, 'com.sun.allen.app’. Learn more (https://developer.apple.com/library/content/documentation/General/Reference/InfoPlistKeyReference/Articles/iPhoneOSKeys.html#//apple_ref/doc/uid/TP40009252-SW40)."
    

解決：

屏幕快照 2018-05-01 20.44.44.png

33. UIPickerView UIDatePicker 分割線去除

    // date picker 分割線去除  self.datePicker.subviews.firstObject.subviews
    - (void)clearSeparatorView {
      [self.datePicker.subviews.firstObject.subviews enumerateObjectsUsingBlock:^( UIView *obj, NSUInteger idx, BOOL *  stop) {
        if (obj.frame.size.height < 1) {
          obj.hidden = YES;
        }
    }];
    }
    
      //UIPickerView 分割線去除
      - (void)clearSeparatorView {
          [self.genderPickerView.subviews enumerateObjectsUsingBlock:^( UIView *obj, NSUInteger idx, BOOL *  stop) {
          if (obj.frame.size.height < 1) {
              obj.hidden = YES;
          }
      }];
    }
    

34. 各一個(gè)有圓角的view添加陰影效果

效果圖.jpg

 MTDealSaleCardView *card = [[MTDealSaleCardView alloc] init];
 card.layer.cornerRadius = 4.f;
// card view 的 masksToBounds = YES; 會(huì)把陰影效果也切掉茎刚。所以要給它增加一個(gè)父視圖，對(duì)父視圖做陰影效果
 card.layer.masksToBounds = YES; 
 card.layer.borderColor = [UIColor colorWithHexString:@"#e4e4e4"].CGColor;
 card.layer.borderWidth = 0.5;


/**
 創(chuàng)建一個(gè)cardContainerView盛放card , 對(duì) cardContainerView 做陰影效果

 @param card card
 @return card的父視圖
 */
- (UIView *)createCardShadowEffect:(MTDealSaleCardView *)card {
  UIView *cardContainerView = [[UIView alloc] init];
  [cardContainerView addSubview:card];

  [card mas_makeConstraints:^(MASConstraintMaker *make) {
    make.left.top.right.bottom.equalTo(cardContainerView);
  }];

  //陰影
  cardContainerView.layer.shadowColor = [UIColor colorWithHexString:@"0f000000"].CGColor;
  cardContainerView.layer.shadowColor = [UIColor yellowColor].CGColor; //todo
  cardContainerView.layer.shadowOffset = CGSizeMake(0, 0);
  cardContainerView.layer.shadowRadius = 4.f;
  cardContainerView.layer.shadowOpacity = 1;
  UIBezierPath *path = [UIBezierPath bezierPath];

  CGFloat addWH = 4.f;
  CGFloat selfWidth = MTRealTimePriceTableViewCell_CardWidth;
  CGFloat selfHeight = MTRealTimePriceTableViewCell_CardHeight;

  CGPoint topLeft = CGPointMake(0, 0);
  CGPoint topMiddle = CGPointMake(selfWidth/2, -addWH);
  CGPoint topRight = CGPointMake(selfWidth, 0);
  CGPoint leftMiddle = CGPointMake(-addWH, selfHeight/2);
  CGPoint leftBottom = CGPointMake(0, selfHeight);
  CGPoint rightMiddel = CGPointMake(selfWidth+addWH, selfHeight/2);
  CGPoint rightBottom = CGPointMake(selfWidth, selfHeight);
  CGPoint bottomMiddel = CGPointMake(selfWidth/2, selfHeight+addWH);

  [path moveToPoint:topLeft];
  [path addQuadCurveToPoint:topRight controlPoint:topMiddle];
  [path addQuadCurveToPoint:rightBottom controlPoint:rightMiddel];
  [path addQuadCurveToPoint:leftBottom controlPoint:bottomMiddel];
  [path addQuadCurveToPoint:topLeft controlPoint:leftMiddle];

  cardContainerView.layer.shadowPath = path.CGPath;

  cardContainerView.backgroundColor = [UIColor whiteColor];

  return cardContainerView;
}

35. 設(shè)置按鈕不可點(diǎn)擊狀態(tài)時(shí)的背景色撤逢，顏色有誤差。原因是系統(tǒng)自動(dòng)加了層蒙版粮坞。

解決：不使用state蚊荣，而是通過(guò)修改button的是否可交互屬性。

    //此處不使用按鈕綁定command莫杈，而是控制按鈕的userInteractionEnabled互例。
  //原因是使用綁定command時(shí)候，直接設(shè)置按鈕UIControlStateDiabled的背景顏色筝闹，系統(tǒng)會(huì)自動(dòng)加上一層蒙版 導(dǎo)致顏色值不對(duì)媳叨。
  //  self.rechargeButton.rac_command = self.viewModel.rechargeCommand;

  [self.viewModel.rechargeCommand.enabled subscribeNext:^(NSNumber *x) {
    @strongify(self)
    if (x.boolValue) {
      self.rechargeButton.userInteractionEnabled = YES;
      [self.rechargeButton setBackgroundImage:[UIImage imageWithColor:MTThemeColor]
                                 forState:(UIControlStateNormal)];
      [self.rechargeButton setTitleAttributes:@{NSFontAttributeName: [UIFont mediumSystemFontOfSize:15], NSForegroundColorAttributeName: [UIColor colorWithHexString:@"#333333"]}
                                 forState:(UIControlStateNormal)];
} else {
      self.rechargeButton.userInteractionEnabled = NO;
      [self.rechargeButton setBackgroundImage:[UIImage imageWithColor:[UIColor colorWithHexString:@"ececec"]]
                                 forState:(UIControlStateNormal)];
      [self.rechargeButton setTitleAttributes:@{NSFontAttributeName: [UIFont mediumSystemFontOfSize:15], NSForegroundColorAttributeName: [UIColor colorWithHexString:@"#c5c5c5"]}
                                 forState:(UIControlStateNormal)];
}
  }];

  [[self.rechargeButton rac_signalForControlEvents:UIControlEventTouchUpInside] subscribeNext:^(id x) {
      @strongify(self)
      [self.viewModel.rechargeCommand execute:nil];
  }];

36. 自定義返回按鈕導(dǎo)致系統(tǒng)的右滑返回手勢(shì)失效

     // 添加上這一行就解決了      
      self.navigationController.interactivePopGestureRecognizer.delegate = (id)self;    
    //
    - (void)viewDidAppear:(BOOL)animated{
        [super viewDidAppear:animated];
        if (self.navigationController.viewControllers.count > 1) {
          self.navigationController.interactivePopGestureRecognizer.enabled = YES;
      }else{
            self.navigationController.interactivePopGestureRecognizer.enabled = NO;
      }
    }
    

37. 隱藏導(dǎo)航欄

carbon.png

38. pop到上上一級(jí)vc

    for (NSInteger i = 0; i<self.navigationController.childViewControllers.count; i++) {
      UIViewController *child = [self.navigationController.childViewControllers objectOrNilAtIndex:i];
      if ([child isKindOfClass:[MTApplyRedemptionViewController class]]) {
        NSMutableArray *tempArr = [NSMutableArray arrayWithArray:self.navigationController.childViewControllers];
        [tempArr removeObject:child];
        [self.navigationController setViewControllers:tempArr];
        break;
      }
    }
    

39. uitextfield輸入內(nèi)容過(guò)長(zhǎng)時(shí)候，字符不自動(dòng)左移問(wèn)題 iOS10以下

解決： 增加uitextfield高度

40. 導(dǎo)航欄上添加視圖frame問(wèn)題

- (SSPageControl *)pageControl {
   if (!_pageControl) {
_pageControl = [[SSPageControl alloc] initWithFrame:CGRectMake(0, 0, 106, 4)];//106是有9張圖片的時(shí)候的最大寬度 .//必須一開始就把寬度寫死关顷，如果動(dòng)態(tài)改變的話會(huì)導(dǎo)致iOS10上 pageControl跳動(dòng)
_pageControl.userInteractionEnabled = NO;
_pageControl.controlNormalSize = 4.f;
_pageControl.controlCurrentSize = 10.f;
_pageControl.controlSpacing = 8.f;
_pageControl.otherBkImg = [UIImage imageWithColor:[UIColor colorWithHexString:@"ffffff50"]];
_pageControl.currentBkImg = [UIImage imageWithColor:[UIColor colorWithHexString:@"ffffff"]];
_pageControl.hidden = YES;
}
return _pageControl;
}

- (void)configurationPageControl {
  self.pageControl.numberOfPages = self.viewModel.imageArray.count;
  self.pageControl.currentPage = 0;
  CGFloat width = [self.pageControl sizeThatFits:CGSizeZero].width;
  CGFloat height = self.pageControl.controlNormalSize;
//  self.pageControl.frame = CGRectMake(0.0, 0.0, width, height); //不能動(dòng)態(tài)的改變frame
  self.pageControl.hidden = (self.viewModel.imageArray.count == 1);
}

  self.navigationItem.titleView = self.pageControl;

41. 同時(shí)重寫setter getter 糊秆，實(shí)例變量報(bào)錯(cuò)問(wèn)題

    
    
    屏幕快照.png

42. 選擇模擬器/真機(jī)，顯示no scheme

[解決 點(diǎn)擊 NO Scheme议双，新增一個(gè)] (https://blog.csdn.net/QearlYu/article/details/53466699)

43. Xcode增加編譯環(huán)境 debug release 新增preProduct

https://blog.csdn.net/FreshManCode/article/details/80354936

屏幕快照 2018-09-12 11.11.39.png

屏幕快照 2018-09-12 11.11.23.png

44. UITextField光標(biāo)換成圖片

UITextField光標(biāo)換成圖片

45. 封裝pod庫(kù)時(shí)帶上資源bundle

圖片路徑

獲取bundle

  + (NSBundle *)ucar_resourceBundle {
      NSBundle *bundle = [NSBundle bundleForClass:[TestProjClass class]];
      NSURL *url = [bundle URLForResource:@"testProj" withExtension:@"bundle"];
      bundle = [NSBundle bundleWithURL:url];
      return bundle;
}

獲取圖片

+ (UIImage *)getImg {
    NSLog(@"哈哈哈哈");
    NSBundle *bundle = [NSBundle ucar_resourceBundle];
    UIImage *image = [UIImage imageNamed:@"ucar_pause.png" inBundle:bundle compatibleWithTraitCollection:nil];
    return image;
}

podspec文件中寫好bundle路徑痘番，把pod庫(kù)發(fā)布出去

   s.resource_bundles = {
      'testProj' => ['testProj/testProj/testProj/testProj.bundle'],
  }

使用示例如下：

屏幕快照 2018-12-10 下午2.50.43.png

46. UISider滑動(dòng)和pan手勢(shì)滑動(dòng)沖突

    #pragma mark - UIGestureRecognizerDelegate
    
    -(BOOL)gestureRecognizer:(UIGestureRecognizer*)gestureRecognizer shouldReceiveTouch:(UITouch*)touch {
        if ([gestureRecognizer isEqual:self.panGR] && [touch.view isEqual:self.progressSilder]) {
            return NO;// 防止pan手勢(shì)影響UISlider的響應(yīng)
        }
        return YES;
    }
    

47. 鍵盤彈起自動(dòng)上滑tableview

- (void)registerForKeyboardNotifications {
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillBeHidden:) name:UIKeyboardWillHideNotification object:nil];
}

- (void)keyboardWillShow:(NSNotification *)aNotification {
NSDictionary* info = [aNotification userInfo];
// 注意不要用UIKeyboardFrameBeginUserInfoKey，第三方鍵盤可能會(huì)存在高度不準(zhǔn)平痰，相差40高度的問(wèn)題
CGSize kbSize = [[info objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue].size;

// 修改滾動(dòng)天和tableView的contentInset
self.tableView.contentInset = UIEdgeInsetsMake(0, 0, kbSize.height, 0);
self.tableView.scrollIndicatorInsets = UIEdgeInsetsMake(0, 0, kbSize.height, 0);

// 跳轉(zhuǎn)到當(dāng)前點(diǎn)擊的輸入框所在的cell
[UIView animateWithDuration:0.2 animations:^{
    [self.tableView scrollToRowAtIndexPath:self.beginEditIndexPath atScrollPosition:UITableViewScrollPositionBottom animated:NO];
}];
}

- (void)keyboardWillBeHidden:(NSNotification *)aNotification {
self.tableView.contentInset = UIEdgeInsetsZero;
self.tableView.scrollIndicatorInsets = UIEdgeInsetsZero;
}

48. Cancle換成漢字『取消』

修改info.plist中 "Localization native development region" 成 "China"

屏幕快照 2019-03-02 下午4.34.20.png

IMG_1784.PNG

49. 日期格式化 https://www.cnblogs.com/Cristen/p/3599922.html

50. 已經(jīng)納入版本管理的文件汞舱，加入.gitignore不生效的問(wèn)題

.gitignore只能忽略那些原來(lái)沒(méi)有被track的文件，如果某些文件已經(jīng)被納入了版本管理中宗雇，則修改.gitignore是無(wú)效的昂芜。

只能clone到本地，刪除后赔蒲，再進(jìn)行忽略泌神。

51. git添加子模塊submodule

  $ git submodule add https://github.com/xxx.git
    Cloning into 'xxx'...
    remote: Counting objects: 11, done.
    remote: Compressing objects: 100% (10/10), done.
    remote: Total 11 (delta 0), reused 11 (delta 0)
    Unpacking objects: 100% (11/11), done.
    Checking connectivity... done.

52. git移除子模塊

• cd .git 切換到.git目錄，修改config嘹履，刪掉 submodule
• cd modules腻扇，刪除子模塊目錄
• cd 項(xiàng)目根目錄 刪除子模塊目錄

53. 去除main.storyboard

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
       
       let win = UIWindow.init(frame: UIScreen.main.bounds)
       win.rootViewController = BWRootTabBarController()
       win.backgroundColor = UIColor.white
       win.makeKeyAndVisible()
       self.window = win
       
       return true
   }

54. cell選中時(shí)，子視圖背景顏色受影響

- (void)layoutSubviews {
    [super layoutSubviews];
    self.statusLabel.backgroundColor = [UIColor colorWithHexRGBAString:@"#FF5B45"];
}

55. didselected方法不管用

• item/cell上有button或者手勢(shì)響應(yīng)了點(diǎn)擊事件

Xcode配置

1. debug包沒(méi)問(wèn)題砾嫉、release包出問(wèn)題原因幼苛。解決方法: 打Release包的時(shí)候把 Optimization Level 改成 None， Debug 模式默認(rèn)就是 None 所以才沒(méi)問(wèn)題焕刮。

2. ’The file “XXX.app” couldn’t be opened because you don’t have permission to view it.‘ 解決辦法: info文件中的字段 Executable file 改成$(PRODUCT_NAME)舶沿。 ????

3. [App] if we're in the real pre-commit handler we can't actually add any new fences due to CA restriction
   解決:

屏幕快照 2017-05-22 11.59.02.png

其他

1. ARC環(huán)境中使用weak 的修飾符來(lái)修飾一個(gè)變量墙杯，防止其在block中被循環(huán)引用，而有些特殊情況下括荡，我們?cè)赽lock中又使用_strong 來(lái)修飾這個(gè)在block外剛剛用_weak修飾的變量高镐，這是因?yàn)樵赽lock中調(diào)用self會(huì)引起循環(huán)引用，而在block中需要對(duì)weakSelf進(jìn)行__strong,保證代碼在執(zhí)行到block中畸冲，self不會(huì)被釋放嫉髓，當(dāng)block執(zhí)行完后，會(huì)自動(dòng)釋放該strongSelf

    eg: AFNetworkReachabilityManager.m 文件中
   
    __weak __typeof(self)weakSelf = self;
        AFNetworkReachabilityStatusBlock callback = ^(AFNetworkReachabilityStatus status) {
            __strong __typeof(weakSelf)strongSelf = weakSelf;
   
            strongSelf.networkReachabilityStatus = status;
            if (strongSelf.networkReachabilityStatusBlock) {
                strongSelf.networkReachabilityStatusBlock(status);
            }
   
        };
   

2. block一般用copy修飾邑闲。block 使用 copy 是從 MRC 遺留下來(lái)的“傳統(tǒng)”,在 MRC 中,方法內(nèi)部的 block 是在棧區(qū)的,使用 copy 可以把它放到堆區(qū).在 ARC 中寫不寫都行：對(duì)于 block 使用 copy 還是 strong 效果是一樣的算行，但寫上 copy 也無(wú)傷大雅，還能時(shí)刻提醒我們：編譯器自動(dòng)對(duì) block 進(jìn)行了 copy 操作苫耸。如果不寫 copy 州邢，該類的調(diào)用者有可能會(huì)忘記或者根本不知道“編譯器會(huì)自動(dòng)對(duì) block 進(jìn)行了 copy 操作”，他們有可能會(huì)在調(diào)用之前自行拷貝屬性值褪子。這種操作多余而低效量淌。
   PS1: 這段話引自@iOS程序犭袁 的OGitHub - ChenYilong/iOSInterviewQuestions:...《招聘一個(gè)靠譜的iOS》面試題參考答案/《招聘一個(gè)靠譜的iOS》面試題參考答案（上）.md
   PS2: 蘋果官方建議。

3. delegate一般用weak修飾嫌褪，這是為了防止內(nèi)存泄漏呀枢。比方說(shuō)一個(gè)viewController持有一個(gè)tableview，tableview的代理是這個(gè)viewController渔扎。如果用strong修飾delegate硫狞，就會(huì)造成循環(huán)引用。 ????

4. 從xib或者storyboard上拖出來(lái)一個(gè)控件A晃痴，自動(dòng)就是weak修飾残吩。這是因?yàn)榭丶嗀放到xib上，已經(jīng)被xib上的view強(qiáng)引用了倘核。A的創(chuàng)建位置是在xib上泣侮，我們?cè)诼暶鲗傩缘奈恢檬且玫竭@個(gè)控件A的引用，用weak就可以了紧唱，不會(huì)增加引用計(jì)數(shù)活尊。 ??

5. OC寫方法的時(shí)候沒(méi)寫返回值類型[doge]，編譯運(yùn)行通過(guò)漏益，默認(rèn)是id ????

6. OC向nil發(fā)消息不回崩潰