來源于CocoaChina
在工作中, 很多小伙伴都會(huì)在PCH文件定義一些常用的宏,但是又怕寫這些簡(jiǎn)單的宏浪費(fèi)時(shí)間罩扇,又有時(shí)候忘記怎么定義了怎么辦烹卒?本人在工作中也是如此棘催。所以在這里給大家分享一些常用的宏定義验靡,喜歡的小伙伴可以直接在項(xiàng)目中使用倍宾,請(qǐng)點(diǎn)擊GitHub - 宏定義頭文件下載雏节!
1.獲取屏幕寬度與高度
#define SCREEN_WIDTH ? [UIScreen mainScreen].bounds.size.width
#define SCREENH_HEIGHT [UIScreen mainScreen].bounds.size.height
2.獲取通知中心
#define LRNotificationCenter [NSNotificationCenter defaultCenter]
3.設(shè)置隨機(jī)顏色
#define LRRandomColor [UIColor colorWithRed:arc4random_uniform(256)/255.0 green:arc4random_uniform(256)/255.0 blue:arc4random_uniform(256)/255.0 alpha:1.0]
4.設(shè)置RGB顏色/設(shè)置RGBA顏色
#define LRRGBColor(r, g, b) [UIColor colorWithRed:(r)/255.0 green:(g)/255.0 blue:(b)/255.0 alpha:1.0]
#define LRRGBAColor(r, g, b, a) [UIColor colorWithRed:(r)/255.0 green:(r)/255.0 blue:(r)/255.0 alpha:a]
// clear背景顏色
#define LRClearColor [UIColor clearColor]
5.自定義高效率的 NSLog
項(xiàng)目開發(fā)中,我們會(huì)在許多地方加上Log凿宾,但是發(fā)布的時(shí)候又不想用這些Log矾屯,我們也不可能一個(gè)一個(gè)的刪除,所以自定義Log是必然的初厚!
#ifdef DEBUG
#define LRLog(...) NSLog(@"%s 第%d行 \n %@\n\n",__func__,__LINE__,[NSString stringWithFormat:__VA_ARGS__])
#else
#define LRLog(...)
#endif
6.弱引用/強(qiáng)引用
#define LRWeakSelf(type) ?__weak typeof(type) weak##type = type;
#define LRStrongSelf(type) ?__strong typeof(type) type = weak##type;
7.設(shè)置 view 圓角和邊框
#define LRViewBorderRadius(View, Radius, Width, Color)\
\
[View.layer setCornerRadius:(Radius)];\
[View.layer setMasksToBounds:YES];\
[View.layer setBorderWidth:(Width)];\
[View.layer setBorderColor:[Color CGColor]]
8.由角度轉(zhuǎn)換弧度 由弧度轉(zhuǎn)換角度
#define LRDegreesToRadian(x) (M_PI * (x) / 180.0)
#define LRRadianToDegrees(radian) (radian*180.0)/(M_PI)
9.設(shè)置加載提示框(第三方框架:Toast)
此宏定義非常好用,但是小伙伴需要CocoaPods導(dǎo)入第三方框架:Toast
使用方法如下:
LRToast(@"網(wǎng)絡(luò)加載失敗");
#define LRToast(str) ? ? ? ? ? ? ?
CSToastStyle *style = [[CSToastStyle alloc] initWithDefaultStyle];?
[kWindow ?makeToast:str duration:0.6 position:CSToastPositionCenter style:style];
kWindow.userInteractionEnabled = NO;?
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.6 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
kWindow.userInteractionEnabled = YES;
});
10.設(shè)置加載提示框(第三方框架:MBProgressHUD)
此宏定義同上一個(gè)類似孙技,如下圖:
MBProgressHUD提示框.png
// 加載
#define kShowNetworkActivityIndicator() [UIApplication sharedApplication].networkActivityIndicatorVisible = YES
// 收起加載
#define HideNetworkActivityIndicator() ? ? ?[UIApplication sharedApplication].networkActivityIndicatorVisible = NO
// 設(shè)置加載
#define NetworkActivityIndicatorVisible(x) ?
[UIApplication sharedApplication].networkActivityIndicatorVisible = x
#define kWindow [UIApplication sharedApplication].keyWindow
#define kBackView ? ? ? ?
for (UIView *item in kWindow.subviews) { \
if(item.tag == 10000) \
{ \
[item removeFromSuperview]; \
UIView * aView = [[UIView alloc] init]; \
aView.frame = [UIScreen mainScreen].bounds; \
aView.tag = 10000; \
aView.backgroundColor = [[UIColor blackColor] colorWithAlphaComponent:0.3]; \
[kWindow addSubview:aView]; \
} \
} \
#define kShowHUDAndActivity kBackView;[MBProgressHUD showHUDAddedTo:kWindow animated:YES];kShowNetworkActivityIndicator()
#define kHiddenHUD [MBProgressHUD hideAllHUDsForView:kWindow animated:YES]
#define kRemoveBackView ? ? ? ? for (UIView *item in kWindow.subviews) { \
if(item.tag == 10000) \
{ \
[UIView animateWithDuration:0.4 animations:^{ \
item.alpha = 0.0; \
} completion:^(BOOL finished) { \
[item removeFromSuperview]; \
}]; \
} \
} \
#define kHiddenHUDAndAvtivity kRemoveBackView;kHiddenHUD;HideNetworkActivityIndicator()
11.獲取view的frame/圖片資源
//獲取view的frame
#define kGetViewWidth(view) ?view.frame.size.width
#define kGetViewHeight(view) view.frame.size.height
#define kGetViewX(view) ? ? ?view.frame.origin.x
#define kGetViewY(view) ? ? ?view.frame.origin.y
//獲取圖片資源
#define kGetImage(imageName) [UIImage imageNamed:[NSString stringWithFormat:@"%@",imageName]]
12.獲取當(dāng)前語言
#define LRCurrentLanguage ([[NSLocale preferredLanguages] objectAtIndex:0])
13.使用 ARC 和 MRC
#if __has_feature(objc_arc)
// ARC
#else
// MRC
#endif
14.判斷當(dāng)前的iPhone設(shè)備/系統(tǒng)版本
//判斷是否為iPhone
#define IS_IPHONE (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone)
//判斷是否為iPad
#define IS_IPAD (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)
//判斷是否為ipod
#define IS_IPOD ([[[UIDevice currentDevice] model] isEqualToString:@"iPod touch"])
// 判斷是否為 iPhone 5SE
#define iPhone5SE [[UIScreen mainScreen] bounds].size.width == 320.0f && [[UIScreen mainScreen] bounds].size.height == 568.0f
// 判斷是否為iPhone 6/6s
#define iPhone6_6s [[UIScreen mainScreen] bounds].size.width == 375.0f && [[UIScreen mainScreen] bounds].size.height == 667.0f
// 判斷是否為iPhone 6Plus/6sPlus
#define iPhone6Plus_6sPlus [[UIScreen mainScreen] bounds].size.width == 414.0f && [[UIScreen mainScreen] bounds].size.height == 736.0f
//獲取系統(tǒng)版本
#define IOS_SYSTEM_VERSION [[[UIDevice currentDevice] systemVersion] floatValue]
//判斷 iOS 8 或更高的系統(tǒng)版本
#define IOS_VERSION_8_OR_LATER (([[[UIDevice currentDevice] systemVersion] floatValue] >=8.0)? (YES):(NO))
15.判斷是真機(jī)還是模擬器
#if TARGET_OS_IPHONE
//iPhone Device
#endif
#if TARGET_IPHONE_SIMULATOR
//iPhone Simulator
#endif
16.沙盒目錄文件
//獲取temp
#define kPathTemp NSTemporaryDirectory()
//獲取沙盒 Document
#define kPathDocument [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject]
//獲取沙盒 Cache
#define kPathCache [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) firstObject]
17.GCD 的宏定義
很多小伙伴都非常煩寫GCD的方法产禾,所以在此定義為宏使用更加方便簡(jiǎn)潔!如下圖:
//GCD - 一次性執(zhí)行
#define kDISPATCH_ONCE_BLOCK(onceBlock) static dispatch_once_t onceToken; dispatch_once(&onceToken, onceBlock);
//GCD - 在Main線程上運(yùn)行
#define kDISPATCH_MAIN_THREAD(mainQueueBlock) dispatch_async(dispatch_get_main_queue(), mainQueueBlock);
//GCD - 開啟異步線程
#define kDISPATCH_GLOBAL_QUEUE_DEFAULT(globalQueueBlock) dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), globalQueueBlocl);
宏與const 的使用:
很多小伙伴在定義一個(gè)常量字符串牵啦,都會(huì)定義成一個(gè)宏亚情,最典型的例子就是服務(wù)器的地址。在此所有用宏定義常量字符的小伙伴以后就用const來定義吧哈雏!為什么呢 楞件?我們看看:
宏的用法: 一般字符串抽成宏,代碼抽成宏使用裳瘪。
const用法:一般常用的字符串定義成const(對(duì)于常量字符串蘋果推薦我們使用const)土浸。
宏與const區(qū)別:
1.編譯時(shí)刻不同,宏屬于預(yù)編譯 彭羹,const屬于編譯時(shí)刻
2.宏能定義代碼黄伊,const不能,多個(gè)宏對(duì)于編譯會(huì)相對(duì)時(shí)間較長(zhǎng)派殷,影響開發(fā)效率还最,調(diào)試過慢,const只會(huì)編譯一次毡惜,縮短編譯時(shí)間拓轻。
3.宏不會(huì)檢查錯(cuò)誤,const會(huì)檢查錯(cuò)誤
通過以上對(duì)比经伙,我們以后在開發(fā)中如果定義一個(gè)常量字符串就用const扶叉,定義代碼就用宏。我們來看看如何使用const橱乱,列舉實(shí)際項(xiàng)目使用方法如下圖:
在上圖本人只是簡(jiǎn)單定義幾個(gè)常量字符串辜梳,我們創(chuàng)建一個(gè)類只要在.h和.m中包含#import 就可以,然后再.h文件聲明一個(gè)字符串泳叠,在.m中實(shí)現(xiàn)就可以了作瞄,最后把這個(gè)類導(dǎo)入PCH文件中,我們就可任意的發(fā)揮啦危纫!