我在键盘显示时尝试向上移动,我的方法是测试键盘的框架和文本框架的框架是否相交。
- (void)keyboardDidShow:(NSNotification *)notification
{
// Get the size of the keyboard.
CGRect keyboardFrame = [[[notification userInfo] objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue];
//Test whether the current frame of the text field is hidden by the keyboard
if (!CGRectIsNull(CGRectIntersection(keyboardFrame,self.activeField.frame))) {
NSLog(@"Key board frame intersects with the text field frame");
}
}
在上面的代码中,CGRectIsNull
始终返回null。
调试语句返回以下信息:键盘和正在选择的活动文本字段:
键盘尺寸=(宽度= 352,高度= 1024) 键盘原点=(x = -352,y = 0)
键盘架=(-352,0,352,1024) 文本字段框架=(200,15,300,30)
每个文本字段都具有相同的帧值,这意味着出错了。那么如何测试键盘是否隐藏文本字段以便我上下移动表单。感谢名单。
答案 0 :(得分:0)
我将整个内容放在全屏UIScrollView中,然后在需要时调整大小......
// This in your init somewhere
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillChange:) name:UIKeyboardWillChangeFrameNotification object:nil];
-(void) keyboardWillChange:(NSNotification*)notify {
CGRect endFrame;
float duration = [[[notify userInfo] valueForKey:UIKeyboardAnimationDurationUserInfoKey] floatValue];
[[[notify userInfo] valueForKey:UIKeyboardFrameEndUserInfoKey] getValue:&endFrame];
endFrame = [self.view convertRect:endFrame fromView:nil];
float y = (endFrame.origin.y > self.view.bounds.size.height ? self.view.bounds.size.height : endFrame.origin.y);
[UIView animateWithDuration:duration animations:^{
scrollView.frame = CGRectMake(0, 0, self.view.bounds.size.width, y);
}];
}
答案 1 :(得分:-1)
试试这个:
[[NSNotificationCenter defaultCenter] addObserverForName:UIKeyboardWillShowNotification object:nil queue:[NSOperationQueue mainQueue] usingBlock:^(NSNotification *note) {}];
并使用[note userInfo];