iOS开发常用的宏定义

一个好的iOS开发工程师必须学会使用宏定义，不仅可以提高开发效率，而且高端、大气、上档次。下面是我总结的一些常用的宏定义

• 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

• 判断手机型号

#define IS_IPHONE (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone)
#define SCREEN_MAX_LENGTH (MAX(SCREEN_WIDTH, SCREEN_HEIGHT))
#define IS_IPHONE_4 ([UIScreen instancesRespondToSelector:@selector(currentMode)] ? CGSizeEqualToSize(CGSizeMake(640, 960), [[UIScreen mainScreen] currentMode].size) : NO)
#define IS_IPHONE_5 ([UIScreen instancesRespondToSelector:@selector(currentMode)] ? CGSizeEqualToSize(CGSizeMake(640, 1136), [[UIScreen mainScreen] currentMode].size) : NO)
#define IS_IPHONE_6  (IS_IPHONE && SCREEN_MAX_LENGTH == 667.0)
#define IS_IPHONE_6P (IS_IPHONE && SCREEN_MAX_LENGTH == 736.0)

• 字符串是否为空

#define kStringIsEmpty(str) ([str isKindOfClass:[NSNull class]] || str == nil || [str length] < 1 ? YES : NO )

• 数组是否为空

#define kArrayIsEmpty(array) (array == nil || [array isKindOfClass:[NSNull class]] || array.count == 0)

• 字典是否为空

#define kDictIsEmpty(dic) (dic == nil || [dic isKindOfClass:[NSNull class]] || dic.allKeys == 0)

• 是否是空对象

#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))

• 一些缩写

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

• APP版本号

#define kAppVersion [[[NSBundle mainBundle] infoDictionary] objectForKey:@"CFBundleShortVersionString"]

• 系统版本号

#define kSystemVersion [[UIDevice currentDevice] systemVersion]

• 获取设备版本

#define IOS_7  [[UIDevice currentDevice].systemVersion floatValue] >= 7.0
#define IOS_8  [[UIDevice currentDevice].systemVersion floatValue] >= 8.0
#define IOS_9  [[UIDevice currentDevice].systemVersion floatValue] >= 9.0
#define IOS_10 [[UIDevice currentDevice].systemVersion floatValue] >= 10.0

• 获取当前语言

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

• 判断是否为iPhone

#define kISiPhone (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone)

• 判断是否为iPad

#define kISiPad (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)

• 获取沙盒Document路径

#define kDocumentPath [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject]

• 获取沙盒temp路径

#define kTempPath NSTemporaryDirectory()

• 获取沙盒Cache路径

#define kCachePath [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) firstObject]

• 判断是真机还是模拟器

#if TARGET_OS_IPHONE
//真机
#endif

#if TARGET_IPHONE_SIMULATOR
//模拟器
#endif

• 开发的时候打印，但是发布的时候不打印的NSLog

#ifdef DEBUG
#define NSLog(...) NSLog(@"%s 第%d行 \n %@\n\n",__func__,__LINE__,[NSString stringWithFormat:__VA_ARGS__])
#else
#define NSLog(...)
#endif
//解决Xcode8+iOS10打印不全的问题
#ifdef DEBUG
#define MSLog(format, ...) printf("[%s] %s [%d行] %s\n", __TIME__, [[[NSString stringWithUTF8String: __FILE__] lastPathComponent] UTF8String], __LINE__, [[NSString stringWithFormat:format, ## __VA_ARGS__] UTF8String]);
#else
#define MSLog(format, ...)
#endif

• 颜色

#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           kRGBColor(arc4random_uniform(256),arc4random_uniform(256),arc4random_uniform(256))

#define kColorWithHex(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]

• 弱引用/强引用

#define kWeakSelf(type)   __weak typeof(type) weak##type = type;
#define kStrongSelf(type) __strong typeof(type) type = weak##type;

• 由角度转换弧度

#define kDegreesToRadian(x)      (M_PI * (x) / 180.0)

• 由弧度转换角度

#define kRadianToDegrees(radian) (radian * 180.0) / (M_PI)

• 获取一段时间间隔

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

大家记住要把这些宏定义写在PCH文件中哦~