宏定义文件 github地址:https://github.com/luran2358/LRMacroDefinition
1.获取屏幕宽度与高度
#defineSCREEN_WIDTH[UIScreen mainScreen].bounds.size.width
#defineSCREENH_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
#defineLRNotificationCenter [NSNotificationCenter defaultCenter]
3.设置随机颜色
#define LRRandomColor [UIColor colorWithRed:arc4random_uniform(256)/255.0green:arc4random_uniform(256)/255.0blue:arc4random_uniform(256)/255.0alpha:1.0]
4.设置RGB颜色/设置RGBA颜色
#defineLRRGBColor(r, g, b)[UIColor colorWithRed:(r)/255.0 green:(g)/255.0 blue:(b)/255.0 alpha:1.0]
#defineLRRGBAColor(r, g, b, a)[UIColor colorWithRed:(r)/255.0 green:(r)/255.0 blue:(r)/255.0 alpha:a]
// clear背景颜色
#defineLRClearColor[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!
#ifdefDEBUG
#defineLRLog(...) NSLog(@"%s 第%d行 \n %@\n\n",__func__,__LINE__,[NSString stringWithFormat:__VA_ARGS__])
#else
#defineLRLog(...)
#endif
6.弱引用/强引用
#define LRWeakSelf(type)__weaktypeof(type)weak##type=type;
#define LRStrongSelf(type)__strongtypeof(type)type= weak##type;
使用方法.png
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
#defineLRDegreesToRadian(x) (M_PI * (x) /180.0)
#defineLRRadianToDegrees(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:0.6position: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:
MBProgressHUD提示框.png
// 加载
#definekShowNetworkActivityIndicator() [UIApplication sharedApplication].networkActivityIndicatorVisible = YES
// 收起加载
#defineHideNetworkActivityIndicator() [UIApplication sharedApplication].networkActivityIndicatorVisible = NO
// 设置加载
#defineNetworkActivityIndicatorVisible(x) [UIApplication sharedApplication].networkActivityIndicatorVisible = x
#definekWindow [UIApplication sharedApplication].keyWindow
#definekBackView for (UIView *item in kWindow.subviews) { \
if(item.tag ==10000) \
{ \
[item removeFromSuperview]; \
UIView * aView = [[UIViewalloc] init]; \
aView.frame = [UIScreen mainScreen].bounds; \
aView.tag =10000; \
aView.backgroundColor = [[UIColor blackColor] colorWithAlphaComponent:0.3]; \
[kWindow addSubview:aView]; \
} \
} \
#definekShowHUDAndActivity kBackView;[MBProgressHUD showHUDAddedTo:kWindow animated:YES];kShowNetworkActivityIndicator()
#definekHiddenHUD [MBProgressHUD hideAllHUDsForView:kWindow animated:YES]
#definekRemoveBackView for (UIView *item in kWindow.subviews) { \
if(item.tag ==10000) \
{ \
[UIView animateWithDuration:0.4animations:^{ \
item.alpha =0.0; \
} completion:^(BOOL finished) { \
[item removeFromSuperview]; \
}]; \
} \
} \
#definekHiddenHUDAndAvtivity 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
#defineLRCurrentLanguage([[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
#defineIS_IPHONE (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone)
#defineIS_IPHONE ([[[UIDevice currentDevice] model] isEqualToString:@"iPhone"])
//判断是否为iPad
#defineIS_IPAD (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)
#defineIS_IPAD ([[[UIDevice currentDevice] model] isEqualToString:@"iPad"])
//判断是否为ipod
#defineIS_IPOD ([[[UIDevice currentDevice] model] isEqualToString:@"iPod touch"])
// 判断是否为 iPhone 5SE
#defineiPhone5SE [[UIScreen mainScreen] bounds].size.width == 320.0f && [[UIScreen mainScreen] bounds].size.height == 568.0f
// 判断是否为iPhone 6/6s
#defineiPhone6_6s [[UIScreen mainScreen] bounds].size.width == 375.0f && [[UIScreen mainScreen] bounds].size.height == 667.0f
// 判断是否为iPhone 6Plus/6sPlus
#defineiPhone6Plus_6sPlus [[UIScreen mainScreen] bounds].size.width == 414.0f && [[UIScreen mainScreen] bounds].size.height == 736.0f
//获取系统版本
//这个方法不是特别靠谱
#defineIOS_SYSTEM_VERSION [[[UIDevice currentDevice] systemVersion] floatValue]
//建议使用这个方法
#defineIOS_SYSTEM_STRING [[UIDevice currentDevice] systemVersion]
//判断 iOS 8 或更高的系统版本
#defineIOS_VERSION_8_OR_LATER (([[[UIDevice currentDevice] systemVersion] floatValue] >=8.0)? (YES):(NO))
15.判断是真机还是模拟器
// 判断是不是iOS系统,如果是iOS系统在真机和模拟器输出都是YES
#ifTARGET_OS_IPHONE
#endif
#if(TARGET_IPHONE_SIMULATOR)
// 在模拟器的情况下
#else
// 在真机情况下
#endif
16.沙盒目录文件
//获取temp
#definekPathTemp NSTemporaryDirectory()
//获取沙盒 Document
#definekPathDocument [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject]
//获取沙盒 Cache
#definekPathCache [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 宏使用方法.png
//GCD - 一次性执行
#definekDISPATCH_ONCE_BLOCK(onceBlock)staticdispatch_once_tonceToken;dispatch_once(&onceToken, onceBlock);
//GCD - 在Main线程上运行
#definekDISPATCH_MAIN_THREAD(mainQueueBlock)dispatch_async(dispatch_get_main_queue(), mainQueueBlock);
//GCD - 开启异步线程
#definekDISPATCH_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:
FANCommonConst.h中声明一个常量字符串.png
FANCommonConst.m中实现一个常量字符串.png
本文转载自别人,只为记录查询方便。