一个不错的工具类头文件
#define ApplicationDelegate ((AppDelegate *)[[UIApplication sharedApplication] delegate])
#define UserDefaults [NSUserDefaults standardUserDefaults]
#define NavBarHeight self.navigationController.navigationBar.bounds.size.height
#define TabBarHeight self.tabBarController.tabBar.bounds.size.height
#define ScreenWidth [[UIScreen mainScreen] bounds].size.width
#define ScreenHeight [[UIScreen mainScreen] bounds].size.height
#define ViewWidth(v) v.frame.size.width
#define ViewHeight(v) v.frame.size.height
#define ViewX(v) v.frame.origin.x
#define ViewY(v) v.frame.origin.y
#define SelfViewWidth self.view.bounds.size.width
#define SelfViewHeight self.view.bounds.size.height
#define RectX(f) f.origin.x
#define RectY(f) f.origin.y
#define RectWidth(f) f.size.width
#define RectHeight(f) f.size.height
#define RectSetWidth(f, w) CGRectMake(RectX(f), RectY(f), w, RectHeight(f))
#define RectSetHeight(f, h) CGRectMake(RectX(f), RectY(f), RectWidth(f), h)
#define RectSetX(f, x) CGRectMake(x, RectY(f), RectWidth(f), RectHeight(f))
#define RectSetY(f, y) CGRectMake(RectX(f), y, RectWidth(f), RectHeight(f))
#define RectSetSize(f, w, h) CGRectMake(RectX(f), RectY(f), w, h)
#define RectSetOrigin(f, x, y) CGRectMake(x, y, RectWidth(f), RectHeight(f))
#define RGB(r, g, b) [UIColor colorWithRed:r/255.0 green:g/255.0 blue:b/255.0 alpha:1.0]
#define RGBA(r, g, b, a) [UIColor colorWithRed:r/255.0 green:g/255.0 blue:b/255.0 alpha:a]
#define HEXCOLOR(c) [UIColor colorWithRed:((c>>16)&0xFF)/255.0 green:((c>>8)&0xFF)/255.0 blue:(c&0xFF)/255.0 alpha:1.0]
#define F(string, args...) [NSString stringWithFormat:string, args]
#define ALERT(title, msg) [[[UIAlertView alloc] initWithTitle:title\
message:msg\
delegate:nil\
cancelButtonTitle:@"确定"\
otherButtonTitles:nil] show]