iOS开发 常用宏定义

#ifndef Public_h#define Public_h// 1.判断是否为iOS7#define iOS7 ([[UIDevice currentDevice].systemVersion doubleValue] >= 7.0)#define IOS_VERSION [[[UIDevice currentDevice] systemVersion] floatValue]// 2.获得RGB颜色#define RGBA(r, g, b, a)                    [UIColor colorWithRed:r/255.0f green:g/255.0f blue:b/255.0f alpha:a]#define RGB(r, g, b)                        RGBA(r, g, b, 1.0f)// 随机色#define RandomColor                 RGB(arc4random_uniform(256), arc4random_uniform(256), arc4random_uniform(256))// 3.是否为4inch#define fourInch ([UIScreen mainScreen].bounds.size.height == 568)// 4.屏幕大小尺寸#define screen_width [UIScreen mainScreen].bounds.size.width#define screen_height [UIScreen mainScreen].bounds.size.height//重新设定view的Y值#define setFrameY(view, newY) view.frame = CGRectMake(view.frame.origin.x, newY, view.frame.size.width, view.frame.size.height)#define setFrameX(view, newX) view.frame = CGRectMake(newX, view.frame.origin.y, view.frame.size.width, view.frame.size.height)#define setFrameH(view, newH) view.frame = CGRectMake(view.frame.origin.x, view.frame.origin.y, view.frame.size.width, newH)#define setFrameW(view, newW) view.frame = CGRectMake(view.frame.origin.x, view.frame.origin.y, newW, view.frame.size.height)//取view的坐标及长宽#define W(view)    view.frame.size.width#define H(view)    view.frame.size.height#define X(view)    view.frame.origin.x#define Y(view)    view.frame.origin.y#define ViewBottomY(view) Y(view)+H(view)#define ViewWidthX(view) X(view)+W(view)//5.常用对象#define APPDELEGATE ((AppDelegate *)[UIApplication sharedApplication].delegate)#define APP_TOPWIMDOW [[UIApplication sharedApplication].windows lastObject]//重写NSLog,Debug模式下打印日志和当前行数#if DEBUG#define NSLog(FORMAT, ...) fprintf(stderr,"line%d content:%s\n",__LINE__,[[NSString stringWithFormat:FORMAT, ##__VA_ARGS__] UTF8String]);//fprintf(stderr,"\nfunction:%s line:%d content:%s", __FUNCTION__, __LINE__, [[NSString stringWithFormat:FORMAT, ##__VA_ARGS__] UTF8String]);#else#define NSLog(FORMAT, ...) nil#endif//----------------------其他----------------------------// View 圆角和加边框#define ViewBorderRadius(View, Radius, Width, Color)\\[View.layer setCornerRadius:(Radius)];\[View.layer setMasksToBounds:YES];\[View.layer setBorderWidth:(Width)];\[View.layer setBorderColor:[Color CGColor]]// View 圆角#define ViewRadius(View, Radius)\\[View.layer setCornerRadius:(Radius)];\[View.layer setMasksToBounds:YES]// 是否iPad#define isPad (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)// 是否iPad#define someThing (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)? ipad: iphone//获取系统版本#define IOS_VERSION ［[UIDevice currentDevice] systemVersion] floatValue]#define CurrentSystemVersion ［UIDevice currentDevice] systemVersion]

//方正黑体简体字体定义#define FONT(F) [UIFont fontWithName:@"FZHTJW--GB1-0" size:F]

#endif /* Public_h */

以及单例模式

// .h文件的实现#define SingletonH(methodName) + (instancetype)shared##methodName;// .m文件的实现#if __has_feature(objc_arc) // 是ARC#define SingletonM(methodName) \static id _instace = nil; \+ (id)allocWithZone:(struct _NSZone *)zone \{ \if (_instace == nil) { \static dispatch_once_t onceToken; \dispatch_once(&onceToken, ^{ \_instace = [super allocWithZone:zone]; \}); \} \return _instace; \} \\- (id)init \{ \static dispatch_once_t onceToken; \dispatch_once(&onceToken, ^{ \_instace = [super init]; \}); \return _instace; \} \\+ (instancetype)shared##methodName \{ \return [[self alloc] init]; \} \+ (id)copyWithZone:(struct _NSZone *)zone \{ \return _instace; \} \\+ (id)mutableCopyWithZone:(struct _NSZone *)zone \{ \return _instace; \}#else // 不是ARC#define SingletonM(methodName) \static id _instace = nil; \+ (id)allocWithZone:(struct _NSZone *)zone \{ \if (_instace == nil) { \static dispatch_once_t onceToken; \dispatch_once(&onceToken, ^{ \_instace = [super allocWithZone:zone]; \}); \} \return _instace; \} \\- (id)init \{ \static dispatch_once_t onceToken; \dispatch_once(&onceToken, ^{ \_instace = [super init]; \}); \return _instace; \} \\+ (instancetype)shared##methodName \{ \return [[self alloc] init]; \} \\- (oneway void)release \{ \\} \\- (id)retain \{ \return self; \} \\- (NSUInteger)retainCount \{ \return 1; \} \+ (id)copyWithZone:(struct _NSZone *)zone \{ \return _instace; \} \\+ (id)mutableCopyWithZone:(struct _NSZone *)zone \{ \return _instace; \}#endif  //Singleton.h

其中这个单例模式先在UserInfoModel.h中

SingletonH(UserInfoModel);

再在.m中

SingletonM(UserInfoModel);

初始化赋值//UserInfoModel是个单例，此处初始化后，数据会一直随应用程序的启动而存在UserInfoModel *userInfoModel = [UserInfoModel mj_objectWithKeyValues:responseData.responseObject[0]];

//其中mj_objectWithKeyValues是mj方法的其中一种，详情请看本人另一篇文章介绍常用mj

调用获取单例中的值，比如获取id[UserInfoModel sharedUserInfoModel].ID