From: http://blog.agilecheetah.com/2011/02/24/modify-iphone-interface-by-code/
圆角的UIView
先加入QuartzCore framework, 再加上#import <QuartzCore/QuartzCore.h>
然后
view.layer.cornerRadius =6;
view.layer.masksToBounds=YES;
修改颜色 UIColor用的是百分比RGB, 定义个宏来转换最适合了
#define RGBA(r, g, b, a) [UIColor colorWithRed:r/255.0 green:g/255.0 blue:b/255.0 alpha:a];
self.backgroundColor=RGBA(118,70,17,1.0);
修改字体大小
textField.font=[textField.font fontWithSize:30];
看着有用，尚未经过测试