iOS開發(fā)中的一些常用方法

1.磁盤總空間大小

+?(CGFloat)diskOfAllSizeMBytes

{

CGFloat?size?=?0.0;

NSError?*error;

NSDictionary?*dic?=?[[NSFileManager?defaultManager]?attributesOfFileSystemForPath:NSHomeDirectory()?error:&error];

if(error)?{

#ifdef?DEBUG

NSLog(@"error:?%@",?error.localizedDescription);

#endif

}else{

NSNumber?*number?=?[dic?objectForKey:NSFileSystemSize];

size?=?[number?floatValue]/1024/1024;

}

returnsize;

}

2.磁盤可用空間大小

+?(CGFloat)diskOfFreeSizeMBytes

{

CGFloat?size?=?0.0;

NSError?*error;

NSDictionary?*dic?=?[[NSFileManager?defaultManager]?attributesOfFileSystemForPath:NSHomeDirectory()?error:&error];

if(error)?{

#ifdef?DEBUG

NSLog(@"error:?%@",?error.localizedDescription);

#endif

}else{

NSNumber?*number?=?[dic?objectForKey:NSFileSystemFreeSize];

size?=?[number?floatValue]/1024/1024;

}

returnsize;

}

3.將字符串?dāng)?shù)組按照元素首字母順序進行排序分組

+?(NSDictionary?*)dictionaryOrderByCharacterWithOriginalArray:(NSArray?*)array

{

if(array.count?==?0)?{

returnnil;

}

for(id?obj?in?array)?{

if(![obj?isKindOfClass:[NSStringclass]])?{

returnnil;

}

UILocalizedIndexedCollation?*indexedCollation?=?[UILocalizedIndexedCollation?currentCollation];

NSMutableArray?*objects?=?[NSMutableArray?arrayWithCapacity:indexedCollation.sectionTitles.count];

//創(chuàng)建27個分組數(shù)組

for(inti?=?0;?i?<?indexedCollation.sectionTitles.count;?i++)?{

NSMutableArray?*obj?=?[NSMutableArray?array];

[objects?addObject:obj];

}

NSMutableArray?*keys?=?[NSMutableArray?arrayWithCapacity:objects.count];

//按字母順序進行分組

NSInteger?lastIndex?=?-1;

for(inti?=?0;?i?<?array.count;?i++)?{

NSInteger?index?=?[indexedCollation?sectionForObject:array[i]?collationStringSelector:@selector(uppercaseString)];

[[objects?objectAtIndex:index]?addObject:array[i]];

lastIndex?=?index;

}

//去掉空數(shù)組

for(inti?=?0;?i?<?objects.count;?i++)?{

NSMutableArray?*obj?=?objects[i];

if(obj.count?==?0)?{

[objects?removeObject:obj];

}

//獲取索引字母

for(NSMutableArray?*obj?in?objects)?{

NSString?*str?=?obj[0];

NSString?*key?=?[self?firstCharacterWithString:str];

[keys?addObject:key];

}

NSMutableDictionary?*dic?=?[NSMutableDictionary?dictionary];

[dic?setObject:objects?forKey:keys];

returndic;

}

4.將字符串?dāng)?shù)組按照元素首字母順序進行排序分組

+?(NSDictionary?*)dictionaryOrderByCharacterWithOriginalArray:(NSArray?*)array

{

if(array.count?==?0)?{

returnnil;

}

for(id?obj?in?array)?{

if(![obj?isKindOfClass:[NSStringclass]])?{

returnnil;

}

UILocalizedIndexedCollation?*indexedCollation?=?[UILocalizedIndexedCollation?currentCollation];

NSMutableArray?*objects?=?[NSMutableArray?arrayWithCapacity:indexedCollation.sectionTitles.count];

//創(chuàng)建27個分組數(shù)組

for(inti?=?0;?i?<?indexedCollation.sectionTitles.count;?i++)?{

NSMutableArray?*obj?=?[NSMutableArray?array];

[objects?addObject:obj];

}

NSMutableArray?*keys?=?[NSMutableArray?arrayWithCapacity:objects.count];

//按字母順序進行分組

NSInteger?lastIndex?=?-1;

for(inti?=?0;?i?<?array.count;?i++)?{

NSInteger?index?=?[indexedCollation?sectionForObject:array[i]?collationStringSelector:@selector(uppercaseString)];

[[objects?objectAtIndex:index]?addObject:array[i]];

lastIndex?=?index;

}

//去掉空數(shù)組

for(inti?=?0;?i?<?objects.count;?i++)?{

NSMutableArray?*obj?=?objects[i];

if(obj.count?==?0)?{

[objects?removeObject:obj];

}

//獲取索引字母

for(NSMutableArray?*obj?in?objects)?{

NSString?*str?=?obj[0];

NSString?*key?=?[self?firstCharacterWithString:str];

[keys?addObject:key];

}

NSMutableDictionary?*dic?=?[NSMutableDictionary?dictionary];

[dic?setObject:objects?forKey:keys];

returndic;

}

5.對圖片進行濾鏡處理

//?懷舊?-->?CIPhotoEffectInstant?????????????????????????單色?-->?CIPhotoEffectMono

//?黑白?-->?CIPhotoEffectNoir????????????????????????????褪色?-->?CIPhotoEffectFade

//?色調(diào)?-->?CIPhotoEffectTonal???????????????????????????沖印?-->?CIPhotoEffectProcess

//?歲月?-->?CIPhotoEffectTransfer????????????????????????鉻黃?-->?CIPhotoEffectChrome

//?CILinearToSRGBToneCurve,?CISRGBToneCurveToLinear,?CIGaussianBlur,?CIBoxBlur,?CIDiscBlur,?CISepiaTone,?CIDepthOfField

+?(UIImage?*)filterWithOriginalImage:(UIImage?*)image?filterName:(NSString?*)name

{

CIContext?*context?=?[CIContext?contextWithOptions:nil];

CIImage?*inputImage?=?[[CIImage?alloc]?initWithImage:image];

CIFilter?*filter?=?[CIFilter?filterWithName:name];

[filter?setValue:inputImage?forKey:kCIInputImageKey];

CIImage?*result?=?[filter?valueForKey:kCIOutputImageKey];

CGImageRef?cgImage?=?[context?createCGImage:result?fromRect:[result?extent]];

UIImage?*resultImage?=?[UIImage?imageWithCGImage:cgImage];

CGImageRelease(cgImage);

returnresultImage;

}

6.對圖片進行模糊處理

//?CIGaussianBlur?--->?高斯模糊

//?CIBoxBlur??????--->?均值模糊(Available?in?iOS?9.0?and?later)

//?CIDiscBlur?????--->?環(huán)形卷積模糊(Available?in?iOS?9.0?and?later)

//?CIMedianFilter?--->?中值模糊,?用于消除圖像噪點,?無需設(shè)置radius(Available?in?iOS?9.0?and?later)

//?CIMotionBlur???--->?運動模糊,?用于模擬相機移動拍攝時的掃尾效果(Available?in?iOS?9.0?and?later)

+?(UIImage?*)blurWithOriginalImage:(UIImage?*)image

blurName:(NSString?*)name

radius:(NSInteger)radius

{

CIContext?*context?=?[CIContext?contextWithOptions:nil];

CIImage?*inputImage?=?[[CIImage?alloc]?initWithImage:image];

CIFilter?*filter;

if(name.length?!=?0)?{

filter?=?[CIFilter?filterWithName:name];

[filter?setValue:inputImage?forKey:kCIInputImageKey];

if(![name?isEqualToString:@"CIMedianFilter"])?{

[filter?setValue:@(radius)?forKey:@"inputRadius"];

}

CIImage?*result?=?[filter?valueForKey:kCIOutputImageKey];

CGImageRef?cgImage?=?[context?createCGImage:result?fromRect:[result?extent]];

UIImage?*resultImage?=?[UIImage?imageWithCGImage:cgImage];

CGImageRelease(cgImage);

returnresultImage;

}else{

returnnil;

}

7.跳轉(zhuǎn)到系統(tǒng)的相關(guān)界面:

*??需要添加一個字段

*??藍色的項目工程文件?->?Info?->?URL?Types?->?添加一個?->?設(shè)置URL??Sch****?為?prefs的url

NSURL?*url?=?[NSURL?URLWithString:@"prefs:root=WIFI"];

[[UIApplication?sharedApplication]?openURL:url];

跳轉(zhuǎn)到其他的界面的字段(不全,詳細看鏈接)

About?—?prefs:root=General&path=About

Accessibility?—?prefs:root=General&path=ACCESSIBILITY

AirplaneModeOn—?prefs:root=AIRPLANE_MODE

Auto-Lock?—?prefs:root=General&path=AUTOLOCK

Brightness?—?prefs:root=Brightness

Bluetooth?—?prefs:root=General&path=Bluetooth

Date&?Time?—?prefs:root=General&path=DATE_AND_TIME

FaceTime?—?prefs:root=FACETIME

General—?prefs:root=General

原文鏈接：http://www.reibang.com/p/19602f48309b

8.創(chuàng)建一張實時模糊效果?View?(毛玻璃效果)

//Avilable?in?iOS?8.0?and?later

+?(UIVisualEffectView?*)effectViewWithFrame:(CGRect)frame

{

UIBlurEffect?*effect?=?[UIBlurEffect?effectWithStyle:UIBlurEffectStyleLight];

UIVisualEffectView?*effectView?=?[[UIVisualEffectView?alloc]?initWithEffect:effect];

effectView.frame?=?frame;

returneffectView;

}

9.設(shè)置Label的行間距

+?(void)setLineSpaceWithString:(UILabel?*)label

{

NSMutableAttributedString?*attributedString?=

[[NSMutableAttributedString?alloc]?initWithString:label.text];

NSMutableParagraphStyle?*paragraphStyle?=??[[NSMutableParagraphStyle?alloc]?init];

[paragraphStyle?setLineSpacing:3];

//調(diào)整行間距

[attributedString?addAttribute:NSParagraphStyleAttributeName

value:paragraphStyle

range:NSMakeRange(0,?[label.text?length])];

label.attributedText?=?attributedString;

}

10.讓Plain風(fēng)格的TableView的區(qū)頭可以”不懸涂闹纾”(可以直接百度搜到):

-?(void)scrollViewDidScroll:(UIScrollView?*)scrollView

{

if(scrollView?==?self.myTab)?{

CGFloat?sectionHeaderHeight?=?40;

if(scrollView.contentOffset.y=0)?{

scrollView.contentInset?=?UIEdgeInsetsMake(-scrollView.contentOffset.y,?0,?0,?0);

}elseif(scrollView.contentOffset.y>=sectionHeaderHeight)?{

scrollView.contentInset?=?UIEdgeInsetsMake(-sectionHeaderHeight,?0,?0,?0);

}

11. 判斷手機號碼格式是否正確悲酷，利用正則表達式驗證

+ (BOOL)isMobileNumber:(NSString *)mobileNum

{

if (mobileNum.length != 11)

{

return NO;

}

/**

* 手機號碼:

* 13[0-9], 14[5,7], 15[0, 1, 2, 3, 5, 6, 7, 8, 9], 17[6, 7, 8], 18[0-9], 170[0-9]

* 移動號段: 134,135,136,137,138,139,150,151,152,157,158,159,182,183,184,187,188,147,178,1705

* 聯(lián)通號段: 130,131,132,155,156,185,186,145,176,1709

* 電信號段: 133,153,180,181,189,177,1700

NSString *MOBILE = @"^1(3[0-9]|4[57]|5[0-35-9]|8[0-9]|70)\d{8}$";

/**

* 中國移動：China Mobile

* 134,135,136,137,138,139,150,151,152,157,158,159,182,183,184,187,188,147,178,1705

NSString *CM = @"(^1(3[4-9]|4[7]|5[0-27-9]|7[8]|8[2-478])\d{8}$)|(^1705\d{7}$)";

/**

* 中國聯(lián)通：China Unicom

* 130,131,132,155,156,185,186,145,176,1709

NSString *CU = @"(^1(3[0-2]|4[5]|5[56]|7[6]|8[56])\d{8}$)|(^1709\d{7}$)";

/**

* 中國電信：China Telecom

* 133,153,180,181,189,177,1700

NSString *CT = @"(^1(33|53|77|8[019])\d{8}$)|(^1700\d{7}$)";

NSPredicate *regextestmobile = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", MOBILE];

NSPredicate *regextestcm = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CM];

NSPredicate *regextestcu = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CU];

NSPredicate *regextestct = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CT];

if (([regextestmobile evaluateWithObject:mobileNum] == YES)

|| ([regextestcm evaluateWithObject:mobileNum] == YES)

|| ([regextestct evaluateWithObject:mobileNum] == YES)

|| ([regextestcu evaluateWithObject:mobileNum] == YES))

{

return YES;

}

else

{

return NO;

}

12. 判斷郵箱格式是否正確，利用正則表達式驗證

+ (BOOL)isAvailableEmail:(NSString *)email

{

NSString *emailRegex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,4}";

NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegex];

return [emailTest evaluateWithObject:email];

}

13. 判斷字符串中是否含有空格

+ (BOOL)isHaveSpaceInString:(NSString *)string{

NSRange _range = [string rangeOfString:@" "];

if (_range.location != NSNotFound) {

return YES;

}else {

return NO;

}

14. 判斷字符串中是否含有中文

+ (BOOL)isHaveChineseInString:(NSString *)string

{

for(NSInteger i = 0; i < [string length]; i++){

int a = [string characterAtIndex:i];

if (a > 0x4e00 && a < 0x9fff) {

return YES;

}

return NO;

}

15. 判斷字符串是否全部為數(shù)字

+ (BOOL)isAllNum:(NSString *)string{? ? unichar c;? ? for (int i=0; i<="" pre="">

判斷是否是純數(shù)字

+ (BOOL)isPureInteger:(NSString *)str {

NSScanner *scanner = [NSScanner scannerWithString:str];

NSInteger val;

return [scanner scanInteger:&val] && [scanner isAtEnd];

}

16. 過濾一些特殊字符似乎只能去除頭尾的特殊字符(不準)

+ (NSString *)filterSpecialWithString:(NSString *)string

{

// 定義一個特殊字符的集合

NSCharacterSet *set = [NSCharacterSet characterSetWithCharactersInString:

@"@／：痊远；: ;（）?「」＂、[]{}#%-*+=_|~＜＞$?^?'@#$%^&*()_+'"];

// 過濾字符串的特殊字符

NSString *newString = [string stringByTrimmingCharactersInSet:set];

return newString;

}

17. 讓iOS應(yīng)用直接退出

+ (void)backOutApp {

UIWindow *window = [[UIApplication sharedApplication].delegate window];

[UIView animateWithDuration:1.0f animations:^{

window.alpha = 0;

} completion:^(BOOL finished) {

exit(0);

}];

}

18. NSArray 快速求總和、最大值、最小值感论、平均值

+ (NSString *)caculateArray:(NSArray *)array

{

CGFloat sum = [[array valueForKeyPath:@"@sum.floatValue"] floatValue];

CGFloat avg = [[array valueForKeyPath:@"@avg.floatValue"] floatValue];

CGFloat max =[[array valueForKeyPath:@"@max.floatValue"] floatValue];

CGFloat min =[[array valueForKeyPath:@"@min.floatValue"] floatValue];

NSLog(@"%fn%fn%fn%f",sum,avg,max,min);

return [NSString stringWithFormat:@"%f",sum];

}

19. 驗證身份證(本人試過,還挺準的)

+ (BOOL)checkIdentityCardNo:(NSString*)value {

value = [value stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];

NSInteger length =0;

if (!value) {

return NO;

}else {

length = value.length;

if (length !=15 && length !=18) {

return NO;

}

// 省份代碼

NSArray *areasArray =@[@"11",@"12", @"13",@"14", @"15",@"21", @"22",@"23", @"31",@"32", @"33",@"34", @"35",@"36", @"37",@"41", @"42",@"43", @"44",@"45", @"46",@"50", @"51",@"52", @"53",@"54", @"61",@"62", @"63",@"64", @"65",@"71", @"81",@"82", @"91"];

NSString *valueStart2 = [value substringToIndex:2];

BOOL areaFlag =NO;

for (NSString *areaCode in areasArray) {

if ([areaCode isEqualToString:valueStart2]) {

areaFlag =YES;

break;

}

if (!areaFlag) {

return false;

}

NSRegularExpression *regularExpression;

NSUInteger numberofMatch;

NSInteger year =0;

switch (length) {

case 15:

year = [[value substringWithRange:NSMakeRange(6,2)] integerValue] +1900;

if (year %4 ==0 || (year 0 ==0 && year %4 ==0)) {

regularExpression = [[NSRegularExpression alloc]initWithPattern:@"^[1-9][0-9]{5}[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|[1-2][0-9]))[0-9]{3}$"

options:NSRegularExpressionCaseInsensitive

error:nil];//測試出生日期的合法性

}else {

options:NSRegularExpressionCaseInsensitive

error:nil];//測試出生日期的合法性

}

numberofMatch = [regularExpression numberOfMatchesInString:value? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? options:NSMatchingReportProgress

range:NSMakeRange(0, value.length)];

if(numberofMatch >0) {

return YES;

}else {

return NO;

}

case 18:

year = [value substringWithRange:NSMakeRange(6,4)].intValue;

if (year %4 ==0 || (year 0 ==0 && year %4 ==0)) {

options:NSRegularExpressionCaseInsensitive? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? error:nil];//測試出生日期的合法性

}else {

regularExpression = [[NSRegularExpression alloc]initWithPattern:@"^[1-9][0-9]{5}19[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|1[0-9]|2[0-8]))[0-9]{3}[0-9Xx]$"? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? options:NSRegularExpressionCaseInsensitive? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? error:nil];//測試出生日期的合法性

}

numberofMatch = [regularExpression numberOfMatchesInString:value? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? options:NSMatchingReportProgress? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? range:NSMakeRange(0, value.length)];

if(numberofMatch >0) {

int S = ([value substringWithRange:NSMakeRange(0,1)].intValue + [value substringWithRange:NSMakeRange(10,1)].intValue) *7 + ([value substringWithRange:NSMakeRange(1,1)].intValue + [value substringWithRange:NSMakeRange(11,1)].intValue) *9 + ([value substringWithRange:NSMakeRange(2,1)].intValue + [value substringWithRange:NSMakeRange(12,1)].intValue) *10 + ([value substringWithRange:NSMakeRange(3,1)].intValue + [value substringWithRange:NSMakeRange(13,1)].intValue) *5 + ([value substringWithRange:NSMakeRange(4,1)].intValue + [value substringWithRange:NSMakeRange(14,1)].intValue) *8 + ([value substringWithRange:NSMakeRange(5,1)].intValue + [value substringWithRange:NSMakeRange(15,1)].intValue) *4 + ([value substringWithRange:NSMakeRange(6,1)].intValue + [value substringWithRange:NSMakeRange(16,1)].intValue) *2 + [value substringWithRange:NSMakeRange(7,1)].intValue *1 + [value substringWithRange:NSMakeRange(8,1)].intValue *6 + [value substringWithRange:NSMakeRange(9,1)].intValue *3;

int Y = S ;

NSString *M =@"F";

NSString *JYM =@"10X98765432";

M = [JYM substringWithRange:NSMakeRange(Y,1)];// 判斷校驗位

if ([M isEqualToString:[value substringWithRange:NSMakeRange(17,1)]]) {

return YES;// 檢測ID的校驗位

}else {

return NO;

}

}else {

return NO;

}

default:

return false;

}

20.?設(shè)置Label里的字符有不同的顏色

//可根據(jù)自己的需求進行增刪改

-?(void)stringColorSet?{

NSString*string?=?@"如何使得Label里的字符有不同的顏色？";

NSRange?range?=?[string?rangeOfString:?@"Label"];

NSMutableAttributedString*attribute?=?[[NSMutableAttributedString?alloc]?initWithString:?string];

[attribute?addAttributes:?@{NSForegroundColorAttributeName:?[UIColor?redColor]}range:?range];

[attribute?addAttributes:?@{NSForegroundColorAttributeName:?[UIColor?greenColor]}range:?NSMakeRange(0,?range.location)];

[attribute?addAttributes:?@{NSForegroundColorAttributeName:?[UIColor?cyanColor]}range:?NSMakeRange(range.location+?range.length,?5)];

UILabel?*label?=?[[UILabel?alloc]?initWithFrame:?CGRectMake(0.0f,?100.0f,?320.0f,?100.0f)];

[label?setText:?string];

[label?setAttributedText:?attribute];

}

如果上面的文章對您在開發(fā)中能派上用場贮尖，請關(guān)注或點個贊吧笛粘，我會不定期的給您分享或推薦一些好的文章哦^_^

最后編輯于：2017.12.03 14:27:18

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