//一、獲得當前屏幕的尺寸: CGRect rect_screen = [[UIScreen mainScreen] bounds]; CGSize size_screen = rect_screen.size; //二、得到scale:iPhone5和iPhone6是2,iPhone6Plus是3 CGFloat scale_screen = [UIScreen mainScreen].scale; NSLog(@"scale_screen:%.f", scale_screen); //3.獲取當前屏幕的分辨率 CGFloat widthResolution = size_screen.width * scale_screen; CGFloat heightResolution = size_screen.height * scale_screen;