1.通用的宏定义
#ifndef define_h
#define define_h
2.获取系统对象
#define GApplication[UIApplication sharedApplication]
#define GAppWindow [UIApplication sharedApplication].delegate.window
#define GAppDelegate[AppDelegate shareAppDelegate]
#define GRootViewController[UIApplication sharedApplication].delegate.window.rootViewController
#define GUserDefaults[NSUserDefaults standardUserDefaults]
#define GNotificationCenter[NSNotificationCenter defaultCenter]
3.获取屏幕宽高
#define GScreenWidth[[UIScreen mainScreen]bounds].size.width
#define GScreenHeight[[UIScreen mainScreen]bounds].size.height
#define GScreen_Bounds[UIScreen mainScreen].bounds
4.强弱引用
#define GWeakSelf(type)__weak typeof(type)weak##type = type;
#define GStrongSelf(type)__strong typeof(type)type = weak##type;
5.DEBUG模式下打印日志,当前行
#ifdef DEBUG
#define GLog(fmt,...)NSLog((@"%s[Line %d]" fmt),__PRETTY_FUNCTION__,__LINE__,##__VA_ARGS__);
#else
#define GLog(...)
#endif
