前言
所以我有一个应用程序的聊天部分,我正在同步的键盘的动画隐藏和显示与上升和下降的聊天输入.
这是我使用的代码：
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,-40);
} completion:nil];
}
这对虚拟键盘非常有用,但如果keyboardWillShow：或keyboardWillHide：由于断开或连接硬件键盘而被调用,则动画滞后.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;
但是这样,现在virtualKeyboard的动画滞后了
我意识到硬件键盘动画不是很常见,这可能不是最重要的问题,但我喜欢所有事情只是工作！
例子
虚拟键盘w /(animationCurve<< 16) - 工作 VirtualKeyboard w /(UIViewAnimationoptions)animationCurve – broKEN 硬件键盘/(animationCurve<< 16) - broKEN HardwareKeyboard w /(UIViewAnimationoptions)animationCurve – WORKING 笔记 模拟器中的硬件键盘cmd shft k 是的,这可以在真实设备上复制. 如果你想要它,这里是我的代码的其余部分,仅用于复制目的 添加文字视图
textView = [UITextView new];
textView.layer.borderWidth = 10;
textView.layer.borderColor = [UIColor blackColor].CGColor;
textView.frame = CGRectMake(0,-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];
手柄口袋
- (void) handleTap:(UITapGestureRecognizer *)tap {
NSLog(@"tapped");
[textView resignFirstResponder];
}
问题：
这里发生了什么,无论虚拟/硬件键盘如何,都有一个很好的方式来获得一致的动画？
我意识到这很久,谢谢你的阅读！
解决方法
由于Apple在键盘通知中发送的动画曲线没有相应的UIViewAnimationoption位,因此您需要下载到旧的非块动画并直接使用曲线：
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];