是否为空
//字符串是否为空
#define strIsEmpty(str) ([str isKindOfClass:[NSNull class]] || str == nil || [str length]<1 ? YES : NO )
//数组是否为空
#define arrayIsEmpty(array) (array == nil || [array isKindOfClass:[NSNull class]] || array.count == 0)
//字典是否为空
#define dicIsEmpty(dic) (dic == nil || [dic isKindOfClass:[NSNull class]] || dic.allKeys == 0)
// 检查空对象
#define OBJECT_IS_EMPTY(_object) (_object == nil || [_object isKindOfClass:[NSNull class]] || ([_object respondsToSelector:@selector(length)] && [(NSData *)_object length] == 0) || ([_object respondsToSelector:@selector(count)] && [(NSArray *)_object count] == 0))
图片
//读取本地图片
#define LOADIMAGE(file,ext) [UIImage imageWithContentsOfFile:[NSBundle mainBundle]pathForResource:(file) ofType:(ext)]
//定义UIImage对象
#define IMAGE(A) [UIImage imageWithContentsOfFile:[NSBundle mainBundle] pathForResource:(A) ofType:nil]
//定义UIImage对象
#define ImageNamed(_pointer) [UIImage imageNamed:(_pointer)]
//建议使用前两种宏定义,性能高于后者//
屏幕
//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
// View 坐标(x,y)和宽高(width,height)
#define X(v) (v).frame.origin.x
#define Y(v) (v).frame.origin.y
#define WIDTH(v) (v).frame.size.width
#define HEIGHT(v) (v).frame.size.height
#define MinX(v) CGRectGetMinX((v).frame)
#define MinY(v) CGRectGetMinY((v).frame)
#define MidX(v) CGRectGetMidX((v).frame)
#define MidY(v) CGRectGetMidY((v).frame)
#define MaxX(v) CGRectGetMaxX((v).frame)
#define MaxY(v) CGRectGetMaxY((v).frame)
//RGB
#define kRGBColor(r, g, b) [UIColor colorWithRed:(r)/255.0 green:(g)/255.0 blue:(b)/255.0 alpha:1.0]
#define kRGBAColor(r, g, b, a) [UIColor colorWithRed:(r)/255.0 green:(r)/255.0 blue:(r)/255.0 alpha:a]
#define kRandomColor [UIColor colorWithRed:arc4random_uniform(256)/255.0 green:arc4random_uniform(256)/255.0 blue:arc4random_uniform(256)/255.0 alpha:1.0]
//! 参数格式为：0xFFFFFF
#define kColorWithRGB(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]
//一像素线
#define SINGLE_LINE_WIDTH (1 / [UIScreen mainScreen].scale)
系统
//当前手机系统版本
#define SystemVersion ([[UIDevice currentDevice] systemVersion])
//是否iPad
#define isPad (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)
//App版本号
#define appMPVersion [[[NSBundle mainBundle] infoDictionary] objectForKey:@"CFBundleShortVersionString"]
//判断是真机还是模拟器
#if TARGET_OS_IPHONE
//iPhone Device
#endif #if TARGET_IPHONE_SIMULATOR
//iPhone Simulator
#endif
//判断当前版本适配(新增)
#if __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_10_0
@interface ZXCapture ()<CALayerDelegate>
#else
@interface ZXCapture ()
#endif
提示
//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 DLog(...) NSLog(@"%s 第%d行 \n %@\n\n",__func__,__LINE__,[NSString stringWithFormat:__VA_ARGS__])
#else
#define DLog(...)
#endif
#define kALERT(msg) [[[UIAlertView alloc] initWithTitle:nil message:msg delegate:nil cancelButtonTitle:@"确认" otherButtonTitles:nil] show]
引用
//弱引用/强引用
#define kWeakSelf(type) __weak typeof(type) weak##type = type;
#define kStrongSelf(type) __strong typeof(type) type = weak##type;
沙盒
//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]
GCD
//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);
//GCD - 延迟0.5
#define kDISPATCH_AFTER(mainQueueBlock) dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.5 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{mainQueueBlock});