#define kNavHeight 64

#define kTabBarHeight 49

#define kSCREEN [UIScreen mainScreen].bounds

#define kSCREEN_WIDTH [UIScreen mainScreen].bounds.size.width

#define kSCREEN_HEIGHT [UIScreen mainScreen].bounds.size.height

#define kSCREEN_MAX_LENGTH (MAX(kSCREEN_WIDTH,kSCREEN_HEIGHT))

#define kSCREEN_MIN_LENGTH (MIN(kSCREEN_WIDTH,kSCREEN_HEIGHT))

#define kViewWidth(VIEW) VIEW.bounds.size.width

#define kViewHeight(VIEW) VIEW.bounds.size.height

#define kViewOriginX(VIEW) VIEW.frame.origin.x

#define kViewOriginY(VIEW) VIEW.frame.origin.y

#define kViewCenterX(VIEW) VIEW.center.x

#define kViewCenterY(VIEW) VIEW.center.y

#define kImageWidth(named) [UIImage imageNamed:named].size.width

#define kImageHeight(named) [UIImage imageNamed:named].size.height

#define kImageWithName(NAME) [UIImage imageNamed:NAME]

#define kImageWithModelName(NAME) [[UIImage imageNamed:NAME]imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal]

#define kImageWithData(DATA) [UIImage imageWithData:DATA]

#define kPopViewController(viewController) [viewController.navigationController popViewControllerAnimated:YES]

#define kNavFrame CGRectMake(0, 0, kSCREEN_WIDTH, kNavHeight)

#define kTabBarFrame CGRectMake(0,kSCREEN_HEIGHT - kTabBarHeight, kSCREEN_WIDTH, kTabBarHeight)

#define kScreenFrame CGRectMake(0, 0, kSCREEN_WIDTH, kSCREEN_HEIGHT)

#define kViewFrameWithHeight(HEIGHT) CGRectMake(0, 0, kSCREEN_WIDTH, HEIGHT)

#define kViewFrameWithWidth(WIDTH) CGRectMake(0, 0,WIDTH, kSCREEN_HEIGHT)

#define kUSER_DEFAULT [NSUserDefaults standardUserDefaults]

#define kFontWithSize(SIZE) [UIFont systemFontOfSize:SIZE]

#define kFontWithBoldSize(SIZE) [UIFont boldSystemFontOfSize:SIZE]

#define kFontWithSize_Weight(SIZE,WEIGHT) [UIFont systemFontOfSize:SIZE weight:WEIGHT]

#define kBlueColor [UIColor blueColor]

#define kCyanColor [UIColor cyanColor]

#define kWhiteColor [UIColor whiteColor]

#define kYellowColor [UIColor yellowColor]

#define kMagentaColor [UIColor magentaColor]

#define kPurpleColor [UIColor purpleColor]

#define kRedColor [UIColor redColor]

#define kBrownColor [UIColor brownColor]

#define kBlackColor [UIColor blackColor]

#define kOrangeColor [UIColor orangeColor]

#define kGreenColor [UIColor greenColor]

#define kGrayColor [UIColor grayColor]

#define kClearColor [UIColor clearColor]

#define kColorWithRGB_A(RED,GREEN,BLUE,ALPHA) [UIColor colorWithRed:RED green:GREEN blue:BLUE alpha:ALPHA]

#define kColorWithRGB(RED,GREEN,BLUE,ALPHA) [UIColor colorWithRed:RED green:GREEN blue:BLUE alpha:1.0f]

#define kColorWithW_A(WHITE,ALPHA) [UIColor colorWithWhite:WHITE alpha:ALPHA]

#define kColorWithWHITE(WHITE) [UIColor colorWithWhite:WHITE alpha:1.0f]

#define kColorFromRGB_A(RGBValue,ALPHA) [UIColor colorWithRed:((float)((RGBValue & 0xFF0000) >> 16)) /255.0 green:((float)((RGBValue & 0xFF00) >> 8)) /255.0 blue:((float)(RGBValue & 0xFF)) /255.0 alpha:ALPHA]

#define kColorFromRGB(RGBValue) kColorFromRGB_A(RGBValue,1.0f)

#define kRandomColor kColorWithRGB_A(arc4random()%256/255.0, arc4random()%256/255.0, arc4random()%256/255.0, 1.0f)

#define kInt(STR) [STR intValue]

#define kLongLong(STR) [STR longLongValue]

#define kInteger(STR) [STR integerValue]

#define kFloat(STR) [STR floatValue]

#define kDouble(STR) [STR doubleValue]

#define kBool(STR) [STR boolValue]

#define kSTR(FORMAT,VALUE) [NSString stringWithFormat:FORMAT,VALUE]

#define kSTRFormat(FORMAT,STR) [NSString stringWithFormat:FORMAT,kDouble(STR)]

#define kAngle(ANGLE) ANGLE*M_PI/180.0

#define kRadians(RADIAN) (180.0 * RADIAN / M_PI)

#define kCurrentSystemVersion [[[UIDevice currentDevice]systemVersion]floatValue]

#define IOS_VERSION_7_OR_LATER ((kCurrentSystemVersion >= 7.0)?(YES):(NO))

#define IOS_VERSION_8_OR_LATER ((kCurrentSystemVersion >= 8.0)?(YES):(NO))

#define IOS_VERSION_9_OR_LATER ((kCurrentSystemVersion >= 9.0)?(YES):(NO))

#define IOS_VERSION_10_OR_LATER ((kCurrentSystemVersion >= 10.0)?(YES):(NO))

#define IS_IPAD (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)

#define IS_IPHONE (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone)

#define IS_RETINA ([[UIScreen mainScreen]scale] >= 2.0)

#define kCurrentLanguage [[NSLocale preferredLanguages]objectAtIndex:0]

#define kBACK_GCD(block) dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), block)

#define kMAIN_GCD(block) dispatch_async(dispatch_get_main_queue(), block)

#define kPickerImage(INFO) INFO[@"UIImagePickerControllerOriginalImage"]

#define kAppName(NAME) CFBundleDisplayName = NAME

還有什么常用的可以一起探討哦！