UITextView 相关知识点

1.得到UITextView的高度

- (CGRect)contentSizeRectForTextView:(UITextView *)textView

{

[textView.layoutManager ensureLayoutForTextContainer:textView.textContainer];

CGRect textBounds = [textView.layoutManager usedRectForTextContainer:textView.textContainer];

CGFloat width =  (CGFloat)ceil(textBounds.size.width + textView.textContainerInset.left + textView.textContainerInset.right);

CGFloat height = (CGFloat)ceil(textBounds.size.height + textView.textContainerInset.top + textView.textContainerInset.bottom);

return CGRectMake(0, 0, width, height);

}

2.