整理一下开发中常用的宏定义，正所谓工欲善其事必先利其器，没有一些方便好用的东西，就能让编码变得更加高效~~~
<pre><code class="hljs">
//获取屏幕 宽度、高度
define DV_W ([UIScreen mainScreen].bounds.size.width)
define DV_H ([UIScreen mainScreen].bounds.size.height)
//获取系统版本
define IOS_VERSION [[[UIDevice currentDevice] systemVersion] floatValue]
define CurrentSystemVersion [[UIDevice currentDevice] systemVersion]
//获取当前语言
define CurrentLanguage ([[NSLocale preferredLanguages] objectAtIndex:0])
//判断是否 Retina屏、设备是否%fhone 5、是否是iPad
define isRetina ([UIScreen instancesRespondToSelector:@selector(currentMode)] ? CGSizeEqualToSize(CGSizeMake(640, 960), [[UIScreen mainScreen] currentMode].size) : NO)
define iPhone5 ([UIScreen instancesRespondToSelector:@selector(currentMode)] ? CGSizeEqualToSize(CGSizeMake(640, 1136), [[UIScreen mainScreen] currentMode].size) : NO)
define isPad (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)
//判断设备的操做系统是不是ios7
define IOS7 ([[[UIDevice currentDevice].systemVersion doubleValue] >= 7.0]
//判断设备的操做系统是不是ios8
define IOS8 ([[[UIDevice currentDevice].systemVersion doubleValue] >= 8.0]
//判断设备的操做系统是不是ios9
define IOS9 ([[[UIDevice currentDevice].systemVersion doubleValue] >= 9.0]
//判断当前设备是不是iPhone4或者4s
define IPHONE4S (([[UIScreen mainScreen] bounds].size.height)==480)
//判断当前设备是不是iPhone5
define IPHONE5 (([[UIScreen mainScreen] bounds].size.height)==568)
//判断当前设备是不是iPhone6
define IPHONE6 (([[UIScreen mainScreen] bounds].size.height)==667)
//判断当前设备是不是iPhone6Plus
define IPHONE6_PLUS (([[UIScreen mainScreen] bounds].size.height)>=736)
//获取当前屏幕的高度
define kMainScreenHeight ([UIScreen mainScreen].applicationFrame.size.height)
//获取当前屏幕的宽度
define kMainScreenWidth ([UIScreen mainScreen].applicationFrame.size.width)
//判断是真机还是模拟器
if TARGET_OS_IPHONE
//iPhone Device
endif
if TARGET_IPHONE_SIMULATOR
//iPhone Simulator
endif
//带有RGBA的颜色设置
define COLOR(R, G, B, A) [UIColor colorWithRed:R/255.0 green:G/255.0 blue:B/255.0 alpha:A]
// 获取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)
define THE_THEME_COLORA(a) RGBA(6,187,106,a)
//方正黑体简体字体定义
define FONT(F) [UIFont fontWithName:@"FZHTJW--GB1-0" size:F]
//G－C－D
define BACK(block) dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), block)
define MAIN(block) dispatch_async(dispatch_get_main_queue(),block)
//由角度获取弧度 有弧度获取角度
define degreesToRadian(x) (M_PI * (x) / 180.0)
define radianToDegrees(radian) (radian*180.0)/(M_PI)
//打印当前方法的名称
define ITTDPRINTMETHODNAME() ITTDPRINT(@"%s", PRETTY_FUNCTION)
</code>
再来个GCD的
<code class='hljs'>
//G－C－D
define BACK(block) dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), block)
//G-C-D主线程
define MAIN(block) dispatch_async(dispatch_get_main_queue(),block)
//延迟GCD时间
define DisTime(time) dispatch_time(DISPATCH_TIME_NOW, time * NSEC_PER_SEC)
//延迟GCD
define DisBACK(disTime,block) dispatch_after(disTime, dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^(void){dispatch_async(dispatch_get_main_queue(), block);});
</code>
延迟时间的用法如下
<code class='hljs'>
//GCD延迟0.5秒执行执行
DisBACK(DisTime(0.5f),^
{
//这里的代码延迟在主线程中执行
});
</code>
引用楼下大神的回复再加一段：
<code class='hljs'>
#ifdef DEBUG
#define HLog(...) NSLog(__VA_ARGS__)
#else
#define HLog(...)
#endif
用16进制的方式获取颜色：
//RGB Color macro
#define UIColorFromRGB(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]
//RGB color macro with alpha
#define UIColorFromRGBWithAlpha(rgbValue,a) [UIColor \
colorWithRed:((float)((rgbValue & 0xFF0000) >> 16))/255.0 \
green:((float)((rgbValue & 0xFF00) >> 8))/255.0 \
blue:((float)(rgbValue & 0xFF))/255.0 alpha:a]
</code>
</pre>
>是不是感觉有了这些东西后，效率变得更高了~~~