1:获取程序包内部的根目录

NSLog(@"bundlePath:%@",[[NSBundle mainBundle] bundlePath]);

2:获取某App的系统配置文件的所有值存入 NSDictionary 键值对中

NSDictionary *dicAppInfo = [[NSBundle mainBundle] infoDictionary];

------------------------------------------------------------------------------NSBundle------------------------------------------------------------------------------

------------------------------------------------------------------------------UIScreen------------------------------------------------------------------------------

1:整个屏幕的大小 {{0, 0}, {320, 480}}

CGRect bounds = [UIScreen mainScreen].bounds;
NSLog(@"UIScreen bounds: %@", NSStringFromCGRect(bounds));

2:应用程序窗口大小 {{0, 20}, {320, 460}}

CGRect applicationFrame = [UIScreen mainScreen].applicationFrame;
NSLog(@"UIScreen applicationFrame: %@", NSStringFromCGRect(applicationFrame));