Question

我正在AppDelegate中创建一个带有标签的UIView，并显示如下：

    [window addSubview:self.roundedCornerView];

问题是当我旋转设备时，带标签的视图根本不会旋转。标签中的文字也是错误的方向。我的应用程序中的窗口有另一个子视图，它是UIViewControllers子视图，并且旋转正常。

我是否需要在AppDelegate中创建另一个UIViewController并将创建的视图附加到它，然后对其进行子类化并允许接口方向以使roundCornerView旋转？

更新好的我已经尝试通过创建新的ViewController来实现这一点，并在此处将其转换为我的AppDelegate中的代码：

    ActivityIndicatorWithLabelViewController *aiWithLabel = [[[ActivityIndicatorWithLabelViewController alloc] init] autorelease];
aiWithLabel.textOfTheLabel = text;

[window addSubview:aiWithLabel.view];

此处可以看到ActivityIndicatorWithLabelViewController类：

//
//  ActivityIndicatorWithLabelViewController.m
//  LOFT
//
//  Created by Marcin Zyga on 15.11.2011.
//  Copyright (c) 2011 __MyCompanyName__. All rights reserved.
//

#import "ActivityIndicatorWithLabelViewController.h"

@implementation ActivityIndicatorWithLabelViewController
@synthesize roundedCornerView;
@synthesize textActivityIndicatorLabel;
@synthesize textOfTheLabel;


- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)didReceiveMemoryWarning
{
    // Releases the view if it doesn't have a superview.
    [super didReceiveMemoryWarning];

    // Release any cached data, images, etc that aren't in use.
}

#pragma mark - View lifecycle

/*
// Implement loadView to create a view hierarchy programmatically, without using a nib.
- (void)loadView
{
}
*/


// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad
{
    [super viewDidLoad];

    UIActivityIndicatorView *mainApplicationActivityIndicatorView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
    mainApplicationActivityIndicatorView.frame = CGRectMake(80, 80, 40, 40);
    mainApplicationActivityIndicatorView.hidesWhenStopped = YES;


    //self.roundedCornerView = [[[UIView alloc] initWithFrame:CGRectMake(280, 400, 200, 200)] autorelease];
    self.roundedCornerView = [[[UIView alloc] initWithFrame:CGRectMake(0, 0, 200, 200)] autorelease];
    roundedCornerView.backgroundColor = [UIColor blackColor];
    roundedCornerView.alpha = 0.9f;
    roundedCornerView.layer.cornerRadius = 12.0;
    [roundedCornerView addSubview:mainApplicationActivityIndicatorView];


    [mainApplicationActivityIndicatorView startAnimating];
    //  self.roundedCornerView.autoresizingMask = UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleWidth;
    //self.roundedCornerView.autoresizesSubviews = YES;



    self.textActivityIndicatorLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 150, 200, 50)];
    self.textActivityIndicatorLabel.backgroundColor = [UIColor clearColor];
    self.textActivityIndicatorLabel.textAlignment = UITextAlignmentCenter;
    self.textActivityIndicatorLabel.textColor = [UIColor whiteColor];
    self.textActivityIndicatorLabel.font = [UIFont systemFontOfSize:22];
    self.textActivityIndicatorLabel.text = @"";
    //  self.textActivityIndicatorLabel.autoresizingMask = UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleWidth; 
    [self.roundedCornerView addSubview:textActivityIndicatorLabel]; 
    self.textActivityIndicatorLabel.text = textOfTheLabel;

    self.view.frame = CGRectMake(280, 400, 200, 200);
    [self.view addSubview:self.roundedCornerView];
    //self.view = self.roundedCornerView;

}


- (void)viewDidUnload
{
    [super viewDidUnload];
    // Release any retained subviews of the main view.
    // e.g. self.myOutlet = nil;
}



- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    // Return YES for supported orientations
    if (UIInterfaceOrientationIsLandscape(interfaceOrientation)) {
        [self.textActivityIndicatorLabel removeFromSuperview];
        [self.textActivityIndicatorLabel release];

        self.textActivityIndicatorLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 50, 50)];
        self.textActivityIndicatorLabel.backgroundColor = [UIColor clearColor];
        self.textActivityIndicatorLabel.textAlignment = UITextAlignmentCenter;
        self.textActivityIndicatorLabel.textColor = [UIColor whiteColor];
        self.textActivityIndicatorLabel.font = [UIFont systemFontOfSize:22];
        self.textActivityIndicatorLabel.text = @"Landscape";
        [self.roundedCornerView addSubview:textActivityIndicatorLabel];         

        NSLog(@"LANDSCAPE");
    }
    NSLog(@"ENTERING SUPPORTED ORIENTATION!");
    return YES;
}

@end

如您所见，这里有一些调试代码。当我将设备从potrait旋转到横向时，我得到了支持支持方向！以及LADNSCAPE NSLog。删除标签工作正常，但是当我添加新标签时，它仍然以错误的方向呈现（文本）。我做错了什么？

Answer 1

UIWindow应该只有一个定义根UIViewController的子视图。我相信UIWindow只会将轮换事件转发到第一个子视图。

创建单个容器UIView并将子视图移动到其中。

Answer 2

窗口子视图不会自行旋转，它们通常在视图控制器的帮助下旋转。

您可以将想要旋转的视图添加到视图控制器，然后将其添加到窗口，也可以注册设备方向更改通知并自行轮换。

Answer 3

解决方案在步骤下方关注：

在subView的.m文件中，在您查看的界面上添加代码：

typedef NS_OPTIONS(NSUInteger, AGInterfaceOrientationMask) {
  AGInterfaceOrientationMaskPortrait = (1 << UIInterfaceOrientationPortrait),
  AGInterfaceOrientationMaskLandscapeLeft = (1 << UIInterfaceOrientationLandscapeLeft),
  AGInterfaceOrientationMaskLandscapeRight = (1 << UIInterfaceOrientationLandscapeRight),
  AGInterfaceOrientationMaskPortraitUpsideDown = (1 << UIInterfaceOrientationPortraitUpsideDown),
  AGInterfaceOrientationMaskLandscape = (AGInterfaceOrientationMaskLandscapeLeft | AGInterfaceOrientationMaskLandscapeRight),
  AGInterfaceOrientationMaskAll = (AGInterfaceOrientationMaskPortrait | AGInterfaceOrientationMaskLandscapeLeft | AGInterfaceOrientationMaskLandscapeRight | AGInterfaceOrientationMaskPortraitUpsideDown),
  AGInterfaceOrientationMaskAllButUpsideDown = (AGInterfaceOrientationMaskPortrait | AGInterfaceOrientationMaskLandscapeLeft | AGInterfaceOrientationMaskLandscapeRight),
}

在subView的.m文件中添加代码

#pragma mark - Orientation

- (void)statusBarFrameOrOrientationChanged:(NSNotification *)notification
{
  /*
  This notification is most likely triggered inside an animation block,
  therefore no animation is needed to perform this nice transition.
  */
  [self rotateAccordingToStatusBarOrientationAndSupportedOrientations];
}

- (void)rotateAccordingToStatusBarOrientationAndSupportedOrientations
{
    UIInterfaceOrientation orientation = [self desiredOrientation];
    CGFloat angle = [self UIInterfaceOrientationAngleOfOrientation:orientation];
    CGFloat statusBarHeight = [[self class] getStatusBarHeight];
    UIInterfaceOrientation statusBarOrientation = [UIApplication sharedApplication].statusBarOrientation;

    CGAffineTransform transform = CGAffineTransformMakeRotation(angle);
    CGRect frame = [[self class] rectInWindowBounds:self.view.window.bounds statusBarOrientation:statusBarOrientation statusBarHeight:statusBarHeight];

    [self setIfNotEqualTransform:transform frame:frame];

    CGRect rect = btnClose.frame;
    rect.origin.x = (subView.frame.origin.x+subView.frame.size.width)-(rect.size.width/2);
    rect.origin.y = subView.frame.origin.y-(rect.size.height/2);
    btnClose.frame = rect;
}

- (void)setIfNotEqualTransform:(CGAffineTransform)transform frame:(CGRect)frame
{
    if(!CGAffineTransformEqualToTransform(self.view.transform, transform))
    {
        self.view.transform = transform;
    }
    if(!CGRectEqualToRect(self.view.frame, frame))
    {
        self.view.frame = frame;
    }
}

+ (CGFloat)getStatusBarHeight
{
    UIInterfaceOrientation orientation = [UIApplication sharedApplication].statusBarOrientation;
    if(UIInterfaceOrientationIsLandscape(orientation))
    {
        return [UIApplication sharedApplication].statusBarFrame.size.width;
    }
    else
    {
        return [UIApplication sharedApplication].statusBarFrame.size.height;
    }
}

static BOOL IS_BELOW_IOS_7()
{
    static BOOL answer;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        answer = [[[UIDevice currentDevice] systemVersion] floatValue] < 7.0;
    });
    return answer;
}

+ (CGRect)rectInWindowBounds:(CGRect)windowBounds statusBarOrientation:(UIInterfaceOrientation)statusBarOrientation statusBarHeight:(CGFloat)statusBarHeight
{
    CGRect frame = windowBounds;

    if(IS_BELOW_IOS_7())
    {
        frame.origin.x += statusBarOrientation == UIInterfaceOrientationLandscapeLeft ? statusBarHeight : 0;
        frame.origin.y += statusBarOrientation == UIInterfaceOrientationPortrait ? statusBarHeight : 0;
        frame.size.width -= UIInterfaceOrientationIsLandscape(statusBarOrientation) ? statusBarHeight : 0;
        frame.size.height -= UIInterfaceOrientationIsPortrait(statusBarOrientation) ? statusBarHeight : 0;
    }
    return frame;
}

- (UIInterfaceOrientation)desiredOrientation
{
    UIInterfaceOrientation statusBarOrientation = [[UIApplication sharedApplication] statusBarOrientation];
    AGInterfaceOrientationMask statusBarOrientationAsMask = [self AGInterfaceOrientationMaskFromOrientation:statusBarOrientation];
    if(self.supportedInterfaceOrientations & statusBarOrientationAsMask)
    {
        return statusBarOrientation;
    }
    else
    {
        if(self.supportedInterfaceOrientations & AGInterfaceOrientationMaskPortrait)
        {
            return UIInterfaceOrientationPortrait;
        }
        else if(self.supportedInterfaceOrientations & AGInterfaceOrientationMaskLandscapeLeft)
        {
            return UIInterfaceOrientationLandscapeLeft;
        }
        else if(self.supportedInterfaceOrientations & AGInterfaceOrientationMaskLandscapeRight)
        {
            return UIInterfaceOrientationLandscapeRight;
        }
        else
        {
            return UIInterfaceOrientationPortraitUpsideDown;
        }
    }
}

-(CGFloat)UIInterfaceOrientationAngleOfOrientation:(UIInterfaceOrientation)orientation
{
    CGFloat angle;

    switch (orientation)
    {
        case UIInterfaceOrientationPortraitUpsideDown:
            angle = M_PI;
            break;
        case UIInterfaceOrientationLandscapeLeft:
            angle = -M_PI_2;
            break;
        case UIInterfaceOrientationLandscapeRight:
            angle = M_PI_2;
            break;
        default:
            angle = 0.0;
            break;
    }

    return angle;
}

-(AGInterfaceOrientationMask)AGInterfaceOrientationMaskFromOrientation:(UIInterfaceOrientation)orientation
{
    return 1 << orientation;
}

//If dealloc is a duplicate method then remove this dealloc method and add the unregisterFromNotifications method in dealloc.
- (void)dealloc {
    [self unregisterFromNotifications];
}

-(void)unregisterFromNotifications
{
    //for orientation
    [[NSNotificationCenter defaultCenter] removeObserver:self name:UIApplicationDidChangeStatusBarOrientationNotification object:nil];
    [[NSNotificationCenter defaultCenter] removeObserver:self name:UIApplicationDidChangeStatusBarFrameNotification object:nil];
}

此外，在subView的.h文件中添加此行。

- (void)rotateAccordingToStatusBarOrientationAndSupportedOrientations;

现在可以在子视图中使用以上添加的代码进行方向更改。

在窗口或self.view中添加子视图，如下所示：

[objAppDelegate.window addSubview:objViewController.view];

//added this method to rotate subview according to orientation when added
[objViewController rotateAccordingToStatusBarOrientationAndSupportedOrientations];

参考取自AGWindowView

窗口子视图在设备方向改变后不旋转

3 个答案: