IOS development common macro, continuous update

We all know that macros are not only convenient, but also improve development efficiency. The following is a summary of some common macros used in iOS development that will continue to be added.

// Whether the string is empty
#define kStringIsEmpty(str) ([str isKindOfClass:[NSNull class]] || str == nil || [str length] < 1 ? YES : NO )
// Whether the array is empty
#define kArrayIsEmpty(array) (array == nil || [array isKindOfClass:[NSNull class]] || array.count == 0)
// Whether the dictionary is empty
#define kDictIsEmpty(dic) (dic == nil || [dic isKindOfClass:[NSNull class]] || dic.allKeys == 0)
// Is an empty object
#define kObjectIsEmpty(_object) (_object == nil \
|| [_object isKindOfClass:[NSNull class]] \
|| ([_object respondsToSelector:@selector(length)] && [(NSData *)_object length] == 0) \
|| ([_object respondsToSelector:@selector(count)] && [(NSArray *)_object count] == 0))

// Get the screen width and height
#define kScreenWidth \
([[UIScreen mainScreen] respondsToSelector:@selector(nativeBounds)] ? [UIScreen mainScreen].nativeBounds.size.width/[UIScreen mainScreen].nativeScale : [UIScreen mainScreen].bounds.size.width)
#define kScreenHeight \
([[UIScreen mainScreen] respondsToSelector:@selector(nativeBounds)] ? [UIScreen mainScreen].nativeBounds.size.height/[UIScreen mainScreen].nativeScale : [UIScreen mainScreen].bounds.size.height)
#define kScreenSize \
([[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)

// Some abbreviations
#define kApplication        [UIApplication sharedApplication]
#define kKeyWindow          [UIApplication sharedApplication].keyWindow
#define kAppDelegate        [UIApplication sharedApplication].delegate
#define kUserDefaults       [NSUserDefaults standardUserDefaults]
#define kNotificationCenter [NSNotificationCenter defaultCenter]

/ / APP version number
#define kAppVersion [[[NSBundle mainBundle] infoDictionary] objectForKey:@"CFBundleShortVersionString"]
// System version number
#define kSystemVersion [[UIDevice currentDevice] systemVersion]
// Get the current language
#define kCurrentLanguage ([[NSLocale preferredLanguages] objectAtIndex:0])
// Check whether it is iPhone
#define kISiPhone (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone)
// Check whether it is iPad
#define kISiPad (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)

// Get the sandbox Document path
#define kDocumentPath [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject]
// Get the sandbox temp path
#define kTempPath NSTemporaryDirectory()
// Get the sandbox Cache path
#define kCachePath [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) firstObject]

// Check whether it is a real machine or an emulator
#if TARGET_OS_IPHONE
/ / real machine
#endif

#if TARGET_IPHONE_SIMULATOR
/ / simulator
#endif

// NSLog printed at development time, but not at publish time
#ifdef DEBUG
#define NSLog(...) NSLog(@"%s line %d \n %@\n\n",__func__,__LINE__,[NSString stringWithFormat:__VA_ARGS__])
#else
#define NSLog(...)
#endif

/ / color
#defineKRGBColor (r, G, b) [UIColor colorWithRed:(r)/255.0 green:(g)/255.0 blue:(b)/255.0 alpha:1.0]
#defineKRGBAColor (r, g, B, a) [UIColor colorWithRed:(r)/255.0 green:(r)/255.0 blue:(r)/255.0 alpha:a]
#define kRandomColor           kRGBColor(arc4random_uniform(256),arc4random_uniform(256),arc4random_uniform(256))

#defineKColorWithHex (rgbValue) \ [UIColor colorWithRed:(float)((rgbValue & 0xFF0000) >> 16)) / 255.0 \ Green :(float)((rgbValue & 0xFF00) >> 8)) / 255.0 \ Blue :(float)(rgbValue & 0xFF)) / 255.0 alpha:1.0]

// Weak reference/strong reference
#define kWeakSelf(type)   __weak typeof(type) weak##type = type;
#define kStrongSelf(type) __strong typeof(type) type = weak##type;

// Convert radians from angles
#defineDegreestoradian (x) (M_PI * (x) / 180.0)
// Convert the Angle from radians
#defineKradiantodegree (Radian) (Radian * 180.0)/(M_PI)

// Get an interval
#define kStartTime CFAbsoluteTime start = CFAbsoluteTimeGetCurrent();
#define kEndTime   NSLog(@"Time: %f", CFAbsoluteTimeGetCurrent() - start)

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