当我更改iOS 8中inputAccessoryView的高度时,inputAccessoryView不会转到正确的位置,而是覆盖键盘.
以下是一些代码段：
在表视图控制器中
- (UIView *)inputAccessoryView {
if (!_commentInputView) {
_commentInputView = [[CommentInputView alloc] initWithFrame:CGRectMake(0,[self width],41)];
[_commentInputView setPlaceholder:NSLocalizedString(@"Comment",nil) andButtonTitle:NSLocalizedString(@"Send",nil)];
[_commentInputView setBackgroundColor:[UIColor whiteColor]];
_commentInputView.hidden = YES;
_commentInputView.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleBottomMargin;
}
return _commentInputView;
}
在CommentInputView中
#when the textview change height
- (void)growingTextView:(HPGrowingTextView *)growingTextView willChangeHeight:(float)height {
if (height > _textView_height) {
[self setHeight:(CGRectGetHeight(self.frame) + height - _textView_height)];
[self reloadInputViews];
}
}
在UIView类别从ios-helpers
- (void)setHeight: (CGFloat)heigth {
CGRect frame = self.frame;
frame.size.height = heigth;
self.frame = frame;
}
解决方法
最后,我找到了答案.在ios8中,apple将一个NSContentSizeLayoutConstraints添加到inputAccessoryView并设置一个常数为44.不能删除这个constaint,因为ios8用它来计算inputAccessoryView的高度.所以,唯一的解决办法是改变这个常数的价值.
例
在ViewDidAppear
- (void)viewDidAppear:(BOOL)animated {
if ([self.inputAccessoryView constraints].count > 0) {
NSLayoutConstraint *constraint = [[self.inputAccessoryView constraints] objectAtIndex:0];
constraint.constant = CommentInputViewBeginHeight;
}
}
当textview高度改变时,更改inputAccessoryView的高度
- (void)growingTextView:(HPGrowingTextView *)growingTextView willChangeHeight:(float)height {
NSLayoutConstraint *constraint = [[self constraints] objectAtIndex:0];
float new_height = height + _textView_vertical_gap*2;
[UIView animateWithDuration:0.2 animations:^{
constraint.constant = new_height;
} completion:^(BOOL finished) {
[self setHeight:new_height];
[self reloadInputViews];
}];
}
那是.
