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前言:
在工作中, 很多小伙伴都会在PCH文件定义一些常用的宏,但是又怕写这些简单的宏浪费时间,又有时候忘记怎么定义了怎么办?本人在工作中也是如此。所以在这里给大家分享一些常用的宏定义,喜欢的小伙伴可以直接在项目中使用(持续更新)!
为了大家使用方便,请点击:
1.获取屏幕宽度与高度
#define SCREEN_WIDTH [UIScreen mainScreen].bounds.size.width#define SCREENH_HEIGHT [UIScreen mainScreen].bounds.size.height
根据一个网友脱离语言提醒, 如果支持横屏可以用下面的宏:
#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 80000 // 当前Xcode支持iOS8及以上#define SCREEN_WIDTH ([[UIScreen mainScreen] respondsToSelector:@selector(nativeBounds)]?[UIScreen mainScreen].nativeBounds.size.width/[UIScreen mainScreen].nativeScale:[UIScreen mainScreen].bounds.size.width)#define SCREENH_HEIGHT ([[UIScreen mainScreen] respondsToSelector:@selector(nativeBounds)]?[UIScreen mainScreen].nativeBounds.size.height/[UIScreen mainScreen].nativeScale:[UIScreen mainScreen].bounds.size.height)#define SCREEN_SIZE ([[UIScreen mainScreen] respondsToSelector:@selector(nativeBounds)]?CGSizeMake([UIScreen mainScreen].nativeBounds.size.width/[UIScreen mainScreen].nativeScale,[UIScreen mainScreen].nativeBounds.size.height/[UIScreen mainScreen].nativeScale):[UIScreen mainScreen].bounds.size)#else#define SCREEN_WIDTH [UIScreen mainScreen].bounds.size.width#define SCREENH_HEIGHT [UIScreen mainScreen].bounds.size.height#define SCREEN_SIZE [UIScreen mainScreen].bounds.size#endif
2.获取通知中心
#define LRNotificationCenter [NSNotificationCenter defaultCenter]
3.设置随机颜色
#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.设置RGB颜色/设置RGBA颜色
#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背景颜色#define LRClearColor [UIColor clearColor]
5.自定义高效率的 NSLog
项目开发中,我们会在许多地方加上Log,但是发布的时候又不想用这些Log,我们也不可能一个一个的删除,所以自定义Log是必然的!
#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/强引用
#define LRWeakSelf(type) __weak typeof(type) weak##type = type;#define LRStrongSelf(type) __strong typeof(type) type = weak##type;
第二种使用方法,定义完弱引用宏之后,直接敲weak.png
7.设置 view 圆角和边框
#define LRViewBorderRadius(View, Radius, Width, Color)\\[View.layer setCornerRadius:(Radius)];\[View.layer setMasksToBounds:YES];\[View.layer setBorderWidth:(Width)];\[View.layer setBorderColor:[Color CGColor]]
8.由角度转换弧度 由弧度转换角度
#define LRDegreesToRadian(x) (M_PI * (x) / 180.0)#define LRRadianToDegrees(radian) (radian*180.0)/(M_PI)
9.设置加载提示框(第三方框架:Toast)
此宏定义非常好用,但是小伙伴需要CocoaPods导入第三方框架:Toast
使用方法如下:
LRToast(@"网络加载失败");#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.设置加载提示框(第三方框架:MBProgressHUD)
此宏定义同上一个类似,如下图:
// 加载#define kShowNetworkActivityIndicator() [UIApplication sharedApplication].networkActivityIndicatorVisible = YES// 收起加载#define HideNetworkActivityIndicator() [UIApplication sharedApplication].networkActivityIndicatorVisible = NO// 设置加载#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.获取view的frame/图片资源
//获取view的frame(不建议使用)//#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//获取图片资源#define kGetImage(imageName) [UIImage imageNamed:[NSString stringWithFormat:@"%@",imageName]]
12.获取当前语言
#define LRCurrentLanguage ([[NSLocale preferredLanguages] objectAtIndex:0])
13.使用 ARC 和 MRC
#if __has_feature(objc_arc)// ARC#else// MRC#endif
14.判断当前的iPhone设备/系统版本
//判断是否为iPhone#define IS_IPHONE (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone)//判断是否为iPad#define IS_IPAD (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)//判断是否为ipod#define IS_IPOD ([[[UIDevice currentDevice] model] isEqualToString:@"iPod touch"])// 判断是否为 iPhone 5SE#define iPhone5SE [[UIScreen mainScreen] bounds].size.width == 320.0f && [[UIScreen mainScreen] bounds].size.height == 568.0f// 判断是否为iPhone 6/6s#define iPhone6_6s [[UIScreen mainScreen] bounds].size.width == 375.0f && [[UIScreen mainScreen] bounds].size.height == 667.0f// 判断是否为iPhone 6Plus/6sPlus#define iPhone6Plus_6sPlus [[UIScreen mainScreen] bounds].size.width == 414.0f && [[UIScreen mainScreen] bounds].size.height == 736.0f//获取系统版本#define IOS_SYSTEM_VERSION [[[UIDevice currentDevice] systemVersion] floatValue]//判断 iOS 8 或更高的系统版本#define IOS_VERSION_8_OR_LATER (([[[UIDevice currentDevice] systemVersion] floatValue] >=8.0)? (YES):(NO))
15.判断是真机还是模拟器
#if TARGET_OS_IPHONE//iPhone Device#endif#if TARGET_IPHONE_SIMULATOR//iPhone Simulator#endif
16.沙盒目录文件
//获取temp#define kPathTemp NSTemporaryDirectory()//获取沙盒 Document#define kPathDocument [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject]//获取沙盒 Cache#define kPathCache [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) firstObject]
17.GCD 的宏定义
很多小伙伴都非常烦写GCD的方法,所以在此定义为宏使用更加方便简洁!如下图:
//GCD - 一次性执行#define kDISPATCH_ONCE_BLOCK(onceBlock) static dispatch_once_t onceToken; dispatch_once(&onceToken, onceBlock);//GCD - 在Main线程上运行#define kDISPATCH_MAIN_THREAD(mainQueueBlock) dispatch_async(dispatch_get_main_queue(), mainQueueBlock);//GCD - 开启异步线程#define kDISPATCH_GLOBAL_QUEUE_DEFAULT(globalQueueBlock) dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), globalQueueBlocl);
宏与const 的使用:
很多小伙伴在定义一个常量字符串,都会定义成一个宏,最典型的例子就是服务器的地址。在此所有用宏定义常量字符的小伙伴以后就用const来定义吧!为什么呢 ?我们看看:
宏的用法:一般字符串抽成宏,代码抽成宏使用。
const用法:一般常用的字符串定义成const(对于常量字符串苹果推荐我们使用const)。
宏与const区别:
1.编译时刻不同,宏属于预编译 ,const属于编译时刻
2.宏能定义代码,const不能,多个宏对于编译会相对时间较长,影响开发效率,调试过慢,const只会编译一次,缩短编译时间。
3.宏不会检查错误,const会检查错误
通过以上对比,我们以后在开发中如果定义一个常量字符串就用const,定义代码就用宏。我们来看看如何使用const,列举实际项目使用方法如下图:
在上图本人只是简单定义几个常量字符串,我们创建一个类只要在.h和.m中包含#import 就可以,然后再.h文件声明一个字符串,在.m中实现就可以了,最后把这个类导入PCH文件中,我们就可任意的发挥啦!
原文地址: http://www.cocoachina.com/ios/20160713/17026.html
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