在键盘上同步animation键盘将同时显示键盘和硬件键盘和虚拟键盘
前言
所以我有一个以聊天部分为特色的应用程序，我正在同步键盘隐藏和显示的animation以及聊天input的兴衰。
以下是我正在使用的代码：
显示：
- (void) keyboardWillShow:(NSNotification *)note { NSDictionary *keyboardAnimationDetail = [note userInfo]; UIViewAnimationCurve animationCurve = [keyboardAnimationDetail[UIKeyboardAnimationCurveUserInfoKey] integerValue]; CGFloat duration = [keyboardAnimationDetail[UIKeyboardAnimationDurationUserInfoKey] floatValue]; NSValue* keyboardFrameBegin = [keyboardAnimationDetail valueForKey:UIKeyboardFrameBeginUserInfoKey]; CGRect keyboardFrameBeginRect = [keyboardFrameBegin CGRectValue]; // working for hardware keyboard //UIViewAnimationOptions options = (UIViewAnimationOptions)animationCurve; // working for virtual keyboard UIViewAnimationOptions options = (animationCurve << 16); [UIView animateWithDuration:duration delay:0.0 options:options animations:^{ textView.frame = CGRectMake(0, self.view.bounds.size.height - keyboardFrameBeginRect.size.height, self.view.bounds.size.width, -40); } completion:nil]; } 隐藏：
- (void) keyboardWillHide:(NSNotification *)note { NSDictionary *keyboardAnimationDetail = [note userInfo]; UIViewAnimationCurve animationCurve = [keyboardAnimationDetail[UIKeyboardAnimationCurveUserInfoKey] integerValue]; CGFloat duration = [keyboardAnimationDetail[UIKeyboardAnimationDurationUserInfoKey] floatValue]; // hardware keyboard //UIViewAnimationOptions options = (UIViewAnimationOptions)animationCurve; // virtual keyboard UIViewAnimationOptions options = (animationCurve << 16); [UIView animateWithDuration:duration delay:0.0 options:options animations:^{ textView.frame = CGRectMake(0, self.view.bounds.size.height, self.view.bounds.size.width, -40); } completion:nil]; }
这对于虚拟键盘来说效果很好，但是如果keyboardWillShow：或keyboardWillHide：由于断开或连接硬件键盘而被调用，则animation会滞后。 我可以通过更改UIViewAnimationOptions来解决这个问题
更换：
// Works with virtual keyboard UIViewAnimationOptions options = (animationCurve << 16);
附：
// working for firstResponder keyboard UIViewAnimationOptions options = (UIViewAnimationOptions)animationCurve;
但是有了这个，现在virtualKeyboardanimation就落后了
我意识到，硬件键盘animation不是很常见，也许不是最重要的问题，但我喜欢一切工作！
例子
VirtualKeyboard w /（animationCurve << 16） – WORKING
VirtualKeyboard W /（UIViewAnimationOptions）animationCurve – BROKEN
HardwareKeyboard w /（animationCurve << 16） – BROKEN
HardwareKeyboard w /（UIViewAnimationOptions）animationCurve – WORKING
笔记
在模拟器cmd + shft + k中模拟硬件键盘
是的，这是可以在真实设备上复制的。
如果你想要的话，这里是我的代码的其余部分，只是为了复制的目的
添加文本视图
textView = [UITextView new]; textView.layer.borderWidth = 10; textView.layer.borderColor = [UIColor blackColor].CGColor; textView.frame = CGRectMake(0, self.view.bounds.size.height, self.view.bounds.size.width, -40); [self.view addSubview:textView]; UITapGestureRecognizer * tap = [[UITapGestureRecognizer alloc]init]; [tap addTarget:self action:@selector(handleTap:)]; [self.view addGestureRecognizer:tap]; // OBSERVE KEYBOARD [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];
手柄敲击：
- (void) handleTap:(UITapGestureRecognizer *)tap { NSLog(@"tapped"); [textView resignFirstResponder]; }
问题：
这里发生了什么事情，是否有一个好方法来获得一致的animation，无论虚拟/硬件键盘？
我意识到这是漫长的，谢谢你的阅读！
由于Apple在键盘通知中发送的animation曲线没有相应的UIViewAnimationOption位，因此您需要将其拖放到老派的非块animation并直接使用曲线：
NSTimeInterval duration = [note.userInfo[UIKeyboardAnimationDurationUserInfoKey] doubleValue]; UIViewAnimationCurve curve = [note.userInfo[UIKeyboardAnimationCurveUserInfoKey] integerValue]; [UIView beginAnimations:@"SomeAnimationID" context:NULL]; [UIView setAnimationCurve:curve]; [UIView setAnimationDuration:duration]; // Animation code [UIView commitAnimations];
keyboardWillShow：
NSDictionary *info = [notification userInfo]; CGRect keyboardFrame = [info[UIKeyboardFrameEndUserInfoKey] CGRectValue]; NSTimeInterval duration = [info[UIKeyboardAnimationDurationUserInfoKey] doubleValue]; UIViewAnimationCurve curve = [info[UIKeyboardAnimationCurveUserInfoKey] integerValue]; [self layoutIfNeeded]; [UIView animateWithDuration:duration delay:0 options:(curve << 20) animations:^{ [self.keyboardConstraint setConstant:keyboardFrame.size.height]; [self layoutIfNeeded]; } completion:nil];