Question

我有一个带底部工具栏的DetailViewController。

此工具栏包含UIButtons和UITextField对象。

为了在编辑时看到这些UITextField，我使用以下例程：

- (void) returnMainViewToInitialposition:(NSNotification*)aNotification{
    [self scrollViewForKeyboard:aNotification up:NO];
}

- (void) scrollViewForKeyboard:(NSNotification*)aNotification up:(BOOL) up{
    if (_detailItem && ( self.addressTextField.editing || self.urlTextField.editing || self.titleTextField.editing )) {
        NSDictionary* userInfo = [aNotification userInfo];

        // Get animation info from userInfo
        NSTimeInterval animationDuration;
        UIViewAnimationCurve animationCurve;
        CGRect keyboardFrame;
        [[userInfo objectForKey:UIKeyboardAnimationCurveUserInfoKey] getValue:&animationCurve];
        [[userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey] getValue:&animationDuration];
        [[userInfo objectForKey:UIKeyboardFrameEndUserInfoKey] getValue:&keyboardFrame];
        CGFloat _keyboardHeight = ([[UIDevice currentDevice] orientation] == UIDeviceOrientationPortrait || [[UIDevice currentDevice] orientation] == UIDeviceOrientationPortraitUpsideDown) ? keyboardFrame.size.height : keyboardFrame.size.width;
        // Animate up or down
        [UIView beginAnimations:nil context:nil];
        [UIView setAnimationDuration:animationDuration];
        [UIView setAnimationCurve:animationCurve];
        [self.view setFrame:CGRectMake(self.view.frame.origin.x, self.view.frame.origin.y + _keyboardHeight * (up?-1:1), self.view.frame.size.width, self.view.frame.size.height)];
        [UIView commitAnimations];
        NSLog(@"detailView bounds: %.0f, (%.0f + %.0f x %d), %3.0f, %3.0f", self.view.frame.origin.x, self.view.frame.origin.y + _keyboardHeight * (up?-1:1), _keyboardHeight, (up?-1:1), self.view.frame.size.width, self.view.frame.size.height);

    }
}

+ (CGRect) convertRect:(CGRect)rect toView:(UIView *)view {
    UIWindow *window = [view isKindOfClass:[UIWindow class]] ? (UIWindow *) view : [view window];
    return [view convertRect:[window convertRect:rect fromWindow:nil] fromView:nil];
}

它可以工作，直到我在当前视图的顶部推送另一个视图，然后将其弹出。然后我在编辑它时看不到我的UITextField。

以上是NSLog的说法：

推送（工作）之前：

detailView bounds: 0, (-704 + 352 x -1), 703, 768

弹出后（不）：

detailView bounds: 0, (352 + 352 x 1), 703, 768

所以看来我的UIViewController在推/弹之间失去了self.view.frame.origin.y ......

在IB中，两个视图（detailView和pushView）的所有大小都设置为“推断”。以下两个视图的选项也相同：

调整滚动视图插图
按下<隐藏底栏
延伸边缘：在顶栏下
“”：在底栏下
“”：在不透明的酒吧下

那么，我的观点发生了什么？谢谢你的帮助。

Answer 1

与往常一样，它是关于如何添加观察者的：它们不应该添加到viewDidLoad方法中，而应添加到viewWillAppear中。现在已经修好了。

在UI Segue之后破坏了我的视图框架

1 个答案: