获取设备屏幕的宽

[UIScreen mainScreen].bounds.size.width

获取设备屏幕的高

[UIScreen mainScreen].bounds.size.height

获取除去状态栏高度后的设备屏幕的宽

[[UIScreen mainScreen]applicationFrame].size.width;

获取除去状态栏高度后的设备屏幕的高

[[UIScreen mainScreen]applicationFrame].size.height;

获取状态栏的宽

[[UIApplication shareApplication] statusBarFrame].size.width;

获取状态栏的高

[[UIApplication shareApplication] statusBarFrame].size.height;