Question

我正在尝试以编程方式确定应用程序的当前高度和宽度。我用这个：

CGRect screenRect = [[UIScreen mainScreen] bounds];

但无论设备是纵向还是横向，这都会产生320的宽度和480的高度。如何确定主屏幕的当前宽度和高度（即取决于设备方向）？

Answer 1

这是我的解决方案代码！此方法可以添加到NSObject类的Categroy，或者您可以定义Top自定义UIViewController类，并让所有其他UIViewControllers继承它。

-(CGRect)currentScreenBoundsDependOnOrientation
{  

    CGRect screenBounds = [UIScreen mainScreen].bounds ;
    CGFloat width = CGRectGetWidth(screenBounds)  ;
    CGFloat height = CGRectGetHeight(screenBounds) ;
    UIInterfaceOrientation interfaceOrientation = [UIApplication sharedApplication].statusBarOrientation;

    if(UIInterfaceOrientationIsPortrait(interfaceOrientation)){
        screenBounds.size = CGSizeMake(width, height);
    }else if(UIInterfaceOrientationIsLandscape(interfaceOrientation)){
        screenBounds.size = CGSizeMake(height, width);
    }
    return screenBounds ;
}

在IOS8之后

注意，Apple Document of UIScreen's bounds property说：

<强>讨论

此矩形在当前坐标空间中指定，该空间考虑了对设备有效的任何界面旋转。因此，当设备在纵向和横向之间旋转时，此属性的值可能会更改。

因此，为了兼顾兼容性，我们应检测IOS版本并进行如下更改：

#define IsIOS8 (NSFoundationVersionNumber > NSFoundationVersionNumber_iOS_7_1)

-(CGRect)currentScreenBoundsDependOnOrientation
{  

    CGRect screenBounds = [UIScreen mainScreen].bounds ;
    if(IsIOS8){
        return screenBounds ;
    }
    CGFloat width = CGRectGetWidth(screenBounds)  ;
    CGFloat height = CGRectGetHeight(screenBounds) ;
    UIInterfaceOrientation interfaceOrientation = [UIApplication sharedApplication].statusBarOrientation;

    if(UIInterfaceOrientationIsPortrait(interfaceOrientation)){
        screenBounds.size = CGSizeMake(width, height);
    }else if(UIInterfaceOrientationIsLandscape(interfaceOrientation)){
        screenBounds.size = CGSizeMake(height, width);
    }
    return screenBounds ;
}

Answer 2

这是一个方便的宏：

#define SCREEN_WIDTH (UIInterfaceOrientationIsPortrait([UIApplication sharedApplication].statusBarOrientation) ? [[UIScreen mainScreen] bounds].size.width : [[UIScreen mainScreen] bounds].size.height)
#define SCREEN_HEIGHT (UIInterfaceOrientationIsPortrait([UIApplication sharedApplication].statusBarOrientation) ? [[UIScreen mainScreen] bounds].size.height : [[UIScreen mainScreen] bounds].size.width)

Answer 3

在iOS 8+中，您应该使用viewWillTransitionToSize:withTransitionCoordinator方法：

-(void)viewWillTransitionToSize:(CGSize)size withTransitionCoordinator:(id<UIViewControllerTransitionCoordinator>)coordinator {
    [super viewWillTransitionToSize:size withTransitionCoordinator:coordinator];

    // You can store size in an instance variable for later
    currentSize = size;

    // This is basically an animation block
    [coordinator animateAlongsideTransition:^(id<UIViewControllerTransitionCoordinatorContext> context) {

        // Get the new orientation if you want
        UIInterfaceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];

        // Adjust your views
        [self.myView setFrame:CGRectMake(0, 0, size.width, size.height)];

    } completion:^(id<UIViewControllerTransitionCoordinatorContext> context) {
        // Anything else you need to do at the end
    }];
}

这取代了不提供有关大小信息的弃用动画方法：

-(void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)orientation duration:(NSTimeInterval)duration

Answer 4

从iOS 8开始，屏幕边界现在返回正确的当前方向。这意味着横向iPad [UIScreen mainScreen] .bounds将在iOS＆lt; = 7上返回768，在iOS 8上返回1024.

以下内容将在发布的所有版本中返回正确的高度和宽度。

-(CGRect)currentScreenBoundsDependOnOrientation
{
    NSString *reqSysVer = @"8.0";
    NSString *currSysVer = [[UIDevice currentDevice] systemVersion];
    if ([currSysVer compare:reqSysVer options:NSNumericSearch] != NSOrderedAscending)
        return [UIScreen mainScreen].bounds;

    CGRect screenBounds = [UIScreen mainScreen].bounds ;
    CGFloat width = CGRectGetWidth(screenBounds)  ;
    CGFloat height = CGRectGetHeight(screenBounds) ;
    UIInterfaceOrientation interfaceOrientation = [UIApplication sharedApplication].statusBarOrientation;

    if(UIInterfaceOrientationIsPortrait(interfaceOrientation)){
        screenBounds.size = CGSizeMake(width, height);
        NSLog(@"Portrait Height: %f", screenBounds.size.height);
    }else if(UIInterfaceOrientationIsLandscape(interfaceOrientation)){
        screenBounds.size = CGSizeMake(height, width);
        NSLog(@"Landscape Height: %f", screenBounds.size.height);
    }

    return screenBounds ;
}

Answer 5

如果您想要与方向相关的尺寸并且您有视图，则可以使用：

view.bounds.size

Answer 6

我为UIScreen编写了类别，适用于所有iOS版本，因此您可以像这样使用它：
[[UIScreen mainScreen] currentScreenSize]。

@implementation UIScreen (ScreenSize)

- (CGSize)currentScreenSize {
    CGRect screenBounds = [[UIScreen mainScreen] bounds];
    CGSize screenSize = screenBounds.size;

    if ( NSFoundationVersionNumber <= NSFoundationVersionNumber_iOS_7_1 ) {  
        UIInterfaceOrientation interfaceOrientation = [[UIApplication sharedApplication] statusBarOrientation];
        if ( UIInterfaceOrientationIsLandscape(interfaceOrientation) ) {
            screenSize = CGSizeMake(screenSize.height, screenSize.width);
        }
    }

    return screenSize;
}

@end

Answer 7

float msWidth = [[UIScreen mainScreen] bounds].size.width*(IS_RETINA?2.0f:1.0f);
float msHeight = [[UIScreen mainScreen] bounds].size.height*(IS_RETINA?2.0f:1.0f);
if ( UIInterfaceOrientationIsPortrait(self.interfaceOrientation) ) {
    os->setWidth(MIN(msWidth, msHeight));
    os->setHeight(MAX(msWidth, msHeight));
} else {
    os->setWidth(MAX(msWidth, msHeight));
    os->setHeight(MIN(msWidth, msHeight));
}

NSLog(@"screen_w %f", os->getWidth());
NSLog(@"screen_h %f", os->getHeight());

Answer 8

但是，在iOS 8.0.2上：

+ (NSUInteger)currentWindowWidth
{
    NSInteger width = 0;
    UIInterfaceOrientation orientation = [UIApplication sharedApplication].statusBarOrientation;
    CGSize size = [UIScreen mainScreen].bounds.size;
   // if (UIInterfaceOrientationIsLandscape(orientation)) {
   //     width = size.height;
   // } else {
        width = size.width;
  //  }

    return width;
}

Answer 9

对要调整大小的视图使用-> setNeedsDisplay（）。

Answer 10

对此处提供的答案进行了一些改进，在 Swift 中：

    let interfaceOrientation = UIApplication.shared.statusBarOrientation // (< iOS 13)
    let screenSize = UIScreen.main.bounds.size
    let screenWidth = interfaceOrientation.isPortrait ? screenSize.width : screenSize.height
    let screenHeight = interfaceOrientation.isPortrait ? screenSize.height : screenSize.width

如何获得与方向相关的屏幕高度和宽度？

11 个答案: