Ios 当UIView中捕获UIDeviceOrientationIDChangeNotification时，UIInterfaceOrientation尚未更新

我正在开发一个开源库，以提供类似于iMessage的文本输入视图——与问题相关。视图将像inputAccessoryView一样附着在键盘上，并随着文本的增长而增长，但不会在键盘消失时消失

我最近在旋转这个自定义UIView时遇到了一个令人恼火的问题，该视图只有通过initWithFrame实例化后才会出现。基本上，当通过initWithFrame实例化视图时，捕获到UIDeviceOrientationIDChangeNotification通知时，UIInterfaceOrientation和frame尚未更新。这里有两种实例化方法

加载名为：

initWithFrame：

当通过loadNibNamed初始化并旋转到横向时，在收到UIDeviceOrientationIDChangeNotification通知时：

UIDeviceOrientation=[[notification object]orientation]=UIInterfaceOrientation和scapeLeft UIInterfaceOrientation=[UIApplication sharedApplication].statusBarOrientation=UIDeviceOrientation和SCAPERight self.frame.size=宽度=480，高度=90 这里需要注意的重要一点是，界面和设备方向都是横向的，宽度已经在iPhone 6.1模拟器上更改为横向宽度测试。现在执行相同的测试，但使用initWithFrame：

UIDeviceOrientation=[[notification object]orientation]=UIDeviceOrientation和scapeRight UIInterfaceOrientation=[UIApplication sharedApplication].statusBarOrientation=UIInterfaceOrientation纵向 self.frame.size=宽度=320，高度=54 这一次请注意，界面方向仍然是纵向的，并且帧宽度没有更改为横向宽度。如果我在setFrame:CGRectframe方法中设置断点，我可以看到在捕获并处理UIDeviceOrientationIDChangeNotification之后，该帧被设置为横向帧

两种init方法的设置几乎相同：

- (id)initWithFrame:(CGRect)frame {
    self = [super initWithFrame:frame];
    if (self) {
        // Initialization code
        self.frame = frame;
        self.sendButton = [[UIButton alloc] initWithFrame:CGRectZero];
        self.messageTextView = [[UITextView alloc] initWithFrame:CGRectZero];
        [self setup];
        [self addSubview:self.sendButton];
        [self addSubview:self.messageTextView];

    }
    return self;
}

- (void)awakeFromNib {
    [super awakeFromNib];
    [self setup];
}

通过安装程序进行必要的视图调整：

- (void)setup {
    self.backgroundColor = [UIColor lightGrayColor];
    self.autoresizesSubviews = YES;
    self.autoresizingMask = UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleBottomMargin | UIViewAutoresizingFlexibleWidth;
    self.userInteractionEnabled = YES;
    self.multipleTouchEnabled = NO;

    CGRect sendButtonFrame = self.bounds;
    sendButtonFrame.size.width = 50;
    sendButtonFrame.size.height = 34;
    sendButtonFrame.origin.x = self.frame.size.width - kComposerBackgroundRightPadding - sendButtonFrame.size.width;
    sendButtonFrame.origin.y = kComposerBackgroundRightPadding;
    self.sendButton.frame = sendButtonFrame;
    self.sendButton.autoresizingMask = UIViewAutoresizingFlexibleBottomMargin | UIViewAutoresizingFlexibleLeftMargin;
    self.sendButton.layer.cornerRadius = 5;
    [self.sendButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
    [self.sendButton setTitleColor:[UIColor colorWithRed:210/255.0 green:210/255.0 blue:210/255.0 alpha:1.0] forState:UIControlStateHighlighted];
    [self.sendButton setTitleColor:[UIColor grayColor] forState:UIControlStateSelected];
    [self.sendButton setBackgroundColor:[UIColor orangeColor]];
    [self.sendButton setTitle:@"Send" forState:UIControlStateNormal];
    self.sendButton.titleLabel.font = [UIFont boldSystemFontOfSize:14];


    CGRect messageTextViewFrame = self.bounds;
    messageTextViewFrame.origin.x = kComposerBackgroundLeftPadding;
    messageTextViewFrame.origin.y = kComposerBackgroundTopPadding;
    messageTextViewFrame.size.width = self.frame.size.width - kComposerBackgroundLeftPadding - kComposerTextViewButtonBetweenPadding - sendButtonFrame.size.width - kComposerBackgroundRightPadding;
    messageTextViewFrame.size.height = 34;
    self.messageTextView.frame = messageTextViewFrame;
    self.messageTextView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleBottomMargin;
    self.messageTextView.showsHorizontalScrollIndicator = NO;
    self.messageTextView.layer.cornerRadius = 5;
    self.messageTextView.font = [UIFont systemFontOfSize:14];
    self.messageTextView.delegate = self;

    [self addNotifications];
    [self resizeTextViewForText:@"" animated:NO];
}

所以我的问题是，为什么我的自定义UIView init通过initWithFrame仍然具有纵向框架和接口方向，以及接收UIDeviceOrientationIDChangeNotification的时间。我使用此通知进行帧调整，需要宽度已更新为横向宽度

---

我希望有某种自转属性，我在程序设置中丢失了，它埋在XIB的某个地方，但就是找不到。我可能已经浏览了十几篇UIDeviceOrientationIDChangeNotification stackoverflow帖子，但没有找到解决方案。

MessageComposer视图看起来不错，谢谢分享

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您应该实现LayoutSubview，而不是侦听UIDeviceOrientationIDChangeNotification。调用它是为了响应旋转和系统需要UIView重新定位其子视图的任何其他操作。在那里，您可以相对于UIView的框架定位子视图，并且可以确保框架是正确的。

MessageComposer视图看起来很整洁，谢谢分享

---

您应该实现LayoutSubview，而不是侦听UIDeviceOrientationIDChangeNotification。调用它是为了响应旋转和系统需要UIView重新定位其子视图的任何其他操作。在那里，您可以相对于UIView的框架定位子视图，并且可以确保框架是正确的。

您可以删除self.frame=frame；在初始化代码中输入一行。对super的调用应该已经完成了。您可以删除self.frame=frame；在初始化代码中输入一行。打电话给super应该已经做到了。我非常感谢你。我一直非常专注于解决当捕获到UIDeviceOrientationIDChangeNotification时为什么框架还没有调整大小，以至于我完全忽略了在其他地方重新配置的可能性。我仍然很好奇为什么会出现这个问题，但从我在UIDeviceOrientation更改的确切时刻期待UIInterfaceOrientation更改这一事实来看，我认为我的方法从一开始就是有缺陷的。我非常感谢你。我一直非常专注于解决当捕获到UIDeviceOrientationIDChangeNotification时为什么框架还没有调整大小，以至于我完全忽略了在其他地方重新配置的可能性。我仍然很好奇为什么会出现这个问题，但从我在UIDeviceOrientation更改的确切时刻期待UIInterfaceOrientation更改这一事实来看，我认为我的方法从一开始就是有缺陷的。

- (id)initWithFrame:(CGRect)frame {
    self = [super initWithFrame:frame];
    if (self) {
        // Initialization code
        self.frame = frame;
        self.sendButton = [[UIButton alloc] initWithFrame:CGRectZero];
        self.messageTextView = [[UITextView alloc] initWithFrame:CGRectZero];
        [self setup];
        [self addSubview:self.sendButton];
        [self addSubview:self.messageTextView];

    }
    return self;
}

- (void)awakeFromNib {
    [super awakeFromNib];
    [self setup];
}

- (void)setup {
    self.backgroundColor = [UIColor lightGrayColor];
    self.autoresizesSubviews = YES;
    self.autoresizingMask = UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleBottomMargin | UIViewAutoresizingFlexibleWidth;
    self.userInteractionEnabled = YES;
    self.multipleTouchEnabled = NO;

    CGRect sendButtonFrame = self.bounds;
    sendButtonFrame.size.width = 50;
    sendButtonFrame.size.height = 34;
    sendButtonFrame.origin.x = self.frame.size.width - kComposerBackgroundRightPadding - sendButtonFrame.size.width;
    sendButtonFrame.origin.y = kComposerBackgroundRightPadding;
    self.sendButton.frame = sendButtonFrame;
    self.sendButton.autoresizingMask = UIViewAutoresizingFlexibleBottomMargin | UIViewAutoresizingFlexibleLeftMargin;
    self.sendButton.layer.cornerRadius = 5;
    [self.sendButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
    [self.sendButton setTitleColor:[UIColor colorWithRed:210/255.0 green:210/255.0 blue:210/255.0 alpha:1.0] forState:UIControlStateHighlighted];
    [self.sendButton setTitleColor:[UIColor grayColor] forState:UIControlStateSelected];
    [self.sendButton setBackgroundColor:[UIColor orangeColor]];
    [self.sendButton setTitle:@"Send" forState:UIControlStateNormal];
    self.sendButton.titleLabel.font = [UIFont boldSystemFontOfSize:14];


    CGRect messageTextViewFrame = self.bounds;
    messageTextViewFrame.origin.x = kComposerBackgroundLeftPadding;
    messageTextViewFrame.origin.y = kComposerBackgroundTopPadding;
    messageTextViewFrame.size.width = self.frame.size.width - kComposerBackgroundLeftPadding - kComposerTextViewButtonBetweenPadding - sendButtonFrame.size.width - kComposerBackgroundRightPadding;
    messageTextViewFrame.size.height = 34;
    self.messageTextView.frame = messageTextViewFrame;
    self.messageTextView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleBottomMargin;
    self.messageTextView.showsHorizontalScrollIndicator = NO;
    self.messageTextView.layer.cornerRadius = 5;
    self.messageTextView.font = [UIFont systemFontOfSize:14];
    self.messageTextView.delegate = self;

    [self addNotifications];
    [self resizeTextViewForText:@"" animated:NO];
}