iOS 8键盘隐藏我的textview [英] iOS 8 keyboard hides my textview

问题描述

我有一个 UIViewController 使用 self.accountViewController.modalPresentationStyle = UIModalPresentationFormSheet; 现在在iOS 8最后 UITextView 在键盘上被隐藏，当它被推上来。如何避免？

I have a UIViewController presented using self.accountViewController.modalPresentationStyle = UIModalPresentationFormSheet; and now in iOS 8 the last UITextView is hidden from the keyboard when it will pushed up. How to avoid It?

推荐答案

@ Oleg的解决方案是好的，但它没有考虑到键盘更改的大小，显示..也，他硬编码动画持续时间和一些其他参数。请参阅下面的解决方案：

@Oleg's solution is good but it doesn't take into consideration keyboard changes in size while its already showing.. also, he hardcoded the animation duration and a few other parameters. See my solution below:

将 UIKeyboardWillChangeFrameNotification 的观察者添加到 viewDidLoad

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardFrameWillChange:) name:UIKeyboardWillChangeFrameNotification object:nil];

然后添加方法：

- (void)keyboardFrameWillChange:(NSNotification *)notification
{
    CGRect keyboardEndFrame = [[[notification userInfo] objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue];
    CGRect keyboardBeginFrame = [[[notification userInfo] objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue];
    UIViewAnimationCurve animationCurve = [[[notification userInfo] objectForKey:UIKeyboardAnimationCurveUserInfoKey] integerValue];
    NSTimeInterval animationDuration = [[[notification userInfo] objectForKey:UIKeyboardAnimationDurationUserInfoKey] integerValue];

    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:animationDuration];
    [UIView setAnimationCurve:animationCurve];

    CGRect newFrame = self.view.frame;
    CGRect keyboardFrameEnd = [self.view convertRect:keyboardEndFrame toView:nil];
    CGRect keyboardFrameBegin = [self.view convertRect:keyboardBeginFrame toView:nil];

    newFrame.origin.y -= (keyboardFrameBegin.origin.y - keyboardFrameEnd.origin.y);
    self.view.frame = newFrame;

    [UIView commitAnimations];
}

不要忘记删除viewDidUnload和Dealloc中的键盘观察器。

Don't forget to remove the keyboard observer in both viewDidUnload and in Dealloc.

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