大佬教程收集整理的这篇文章主要介绍了根据iOS7中的内容调整UItextview的大小，大佬教程大佬觉得挺不错的，现在分享给大家，也给大家做个参考。
以下代码在iOS 6中正常工作
if (/* less than ios 7 */) { CGRect frame = _textView.frame; CGSize conSize = _textView.contentSize; CGFloat difference = conSize.height - frame.size.height; frame.size.height += difference; _textView.frame = frame; UIScrollView *parentView = (UIScrollView *)_textView.superview; // adjust views residing below this text view. // sibling view UIView *belowView = // access it somehow CGRect frame1 = belowView.frame; frame1.origin.y += difference; belowView.frame = frame1; // adjust parent scroll view,increase height. CGSize frame3 = parentView.contentSize; frame3.height += difference; parentView.contentSize = frame3; } else { // tried [_textView sizeToFit]; [_textView layoutIfNeeded]; [parentView sizeToFit]; [parentView layoutIfNeeded]; }
试图遵循iOS 7解决方案：
How do I size a UITextView to its content on iOS 7?
但不工作.
任何指针？
if (/* ios 7 */) { [_textView.layoutManager ensureLayoutForTextContainer:_textView.textContainer]; [_textView layoutIfNeeded]; } CGRect frame = _textView.frame; CGSize conSize = _textView.contentSize; CGFloat difference = conSize.height - frame.size.height; frame.size.height += difference; _textView.frame = frame; UIScrollView *parentView = (UIScrollView *)_textView.superview; // adjust views residing below this text view. // sibling view UIView *belowView = // access it somehow CGRect frame1 = belowView.frame; frame1.origin.y += difference; belowView.frame = frame1; // adjust parent scroll view,increase height. CGSize frame3 = parentView.contentSize; frame3.height += difference; parentView.contentSize = frame3;
- (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,width,height);
}
此外,似乎UITextView的setContentSize：方法是从layoutSubviews调用的.所以,在调用ensureLayoutForTextContainer之后,在一个textView(它本身调用layoutSubviews)上调用layoutIfNeeded：在其layoutManager中,应该使textView的contentSize正确.
[someTextView.layoutManager ensureLayoutForTextContainer:someTextView.textContainer]; [someTextView layoutIfNeeded]; // someTextView.contentSize should Now have correct value
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