ios中Textview高度随文字的高度的变化而变化

- (void)textViewDidChange:(UITextView *)textView
{

[textView flashScrollIndicators];
// 闪动滚动条

static CGFloat maxHeight =
130.0f;

CGRect frame = textView.frame;

CGSize constraintSize =
CGSizeMake(frame.size.width,
MAXFLOAT);

CGSize size = [textView
sizeThatFits:constraintSize];

if (size.height >= maxHeight)
{
size.height = maxHeight;
textView.scrollEnabled =
YES; // 允许滚动
}

else
{

textView.scrollEnabled =
NO;
// 不允许滚动，当textview的大小足以容纳它的text的时候，需要设置scrollEnabed为NO，否则会出现光标乱滚动的情况
}
textView.frame =
CGRectMake(frame.origin.x, frame.origin.y, frame.size.width,
size.height);
}