ios UITextView 自动高度
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UITextView Auto Height
提问by Rollo
How do I make a UITextView expand or shrink to the size of the text inside it and then make the UIScrollview Expand or shrink to fit the UITextView
如何使 UITextView 扩展或收缩到其中的文本大小，然后使 UIScrollview 扩展或收缩以适合 UITextView
回答by bryanmac
CGRect frame;
frame = textiew.frame;
frame.size.height = [textView contentSize].height;
textView.frame = frame;
One thing to note is that the correct contentSize is only available afterthe UITextView has been added to the view with addSubview and the text is assigned to it. Prior to that it is equal to frame.size
需要注意的一件事是，正确的 contentSize 仅在使用 addSubview 将 UITextView 添加到视图并为其分配文本后才可用。在此之前它等于 frame.size
