ios如果獲取應用程序可用區域

講白了，就是調用主屏幕的applicationFrame

    //applicationFrame
    CGRect rect2 = [[UIScreen mainScreen] applicationFrame];
    NSLog(@"寬：%f",rect2.size.width);
    NSLog(@"高：%f",rect2.size.height);
    
    NSLog(@"x：%f",rect2.origin.x);
    NSLog(@"y：%f",rect2.origin.y);