ios 当键盘就位时移动 UIScrollView
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Move UIScrollView when keyboard comes into place
提问by thenetimp
[Edit:] The problem has been solved. I did not have my delegates linked properly in UIBuilder. Code is good!
[编辑：] 问题已解决。我没有在UIBuilder. 代码很好！
I am trying to resize a scrollview when the keyboard appears. I went to the developer docs and found this information.
当键盘出现时，我试图调整滚动视图的大小。我去了开发人员文档并找到了这些信息。
On the left "Managing the keyboard".
在左侧“管理键盘”。
In the documentation it shows a bit of code to detect the size of the keyboard and then to resize a UIScrollView. I have placed an NSLogmessage in the code for function - (void)keyboardWasShown:(NSNotification*)aNotificationso I see that the function is actually being called, but when I try to to NSLogthe kbSize.height it is always valued at 0.
在文档中，它显示了一些代码来检测键盘的大小，然后调整UIScrollView. 我NSLog在函数的代码中放置了一条消息，- (void)keyboardWasShown:(NSNotification*)aNotification所以我看到该函数实际上正在被调用，但是当我尝试NSLog使用kbSize.height 时，它的值始终为 0。
Why does the code that apple provide for this purpose not work?
为什么苹果为此目的提供的代码不起作用？
- (void)keyboardWasShown:(NSNotification*)aNotification
{
NSDictionary* info = [aNotification userInfo];
CGSize kbSize = [[info objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;
UIEdgeInsets contentInsets = UIEdgeInsetsMake(0.0, 0.0, kbSize.height, 0.0);
scrollView.contentInset = contentInsets;
scrollView.scrollIndicatorInsets = contentInsets;
// If active text field is hidden by keyboard, scroll it so it's visible
// Your application might not need or want this behavior.
CGRect aRect = self.view.frame;
aRect.size.height -= kbSize.height;
if (!CGRectContainsPoint(aRect, activeField.frame.origin) ) {
CGPoint scrollPoint = CGPointMake(0.0, activeField.frame.origin.y-kbSize.height);
[scrollView setContentOffset:scrollPoint animated:YES];
}
}
回答by Reuven
You may want to try the highly recommended "TPKeyboardAvoidingScrollView", available from: https://github.com/michaeltyson/TPKeyboardAvoiding
您可能想尝试强烈推荐的“TPKeyboardAvoidingScrollView”，可从以下网址获得：https: //github.com/michaeltyson/TPKeyboardAvoiding
Works like a charm...
奇迹般有效...
回答by Mihai Fratu
Have you ever added an observer for that specific notification? Make sure that in your loadViewmethod you do this:
您是否为该特定通知添加了观察者？确保在你的loadView方法中你这样做：
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWasShown:) name:UIKeyboardDidShowNotification object:nil];
Don't forget to unregister the observer on viewDidUnloadmethod like this:
不要忘记在viewDidUnload方法上取消注册观察者，如下所示：
[[NSNotificationCenter defaultCenter] removeObserver:self];
Let me know if that works out!
让我知道这是否有效！
回答by DBD
I've done this several times with a UITableView(which is just an extended UIScrollView). You can find the code in this answer.
回答by bogen
One simple solution is to add the extension UIViewController+Keyboard.swift to your project, with a single line
一个简单的解决方案是将扩展 UIViewController+Keyboard.swift 添加到您的项目中，只需一行
setupKeyboardNotifcationListenerForScrollView(scrollView)
it will auto resize automatically when keyboard appears. No need to subclass anything, just an extension! Its availble at GitHub SingleLineKeyboardResize
当键盘出现时它会自动调整大小。不需要继承任何东西，只是一个扩展！它在 GitHub SingleLineKeyboardResize上可用
