[IOS]textView自动滚动到底部

UITextView text content doesn't start from the top

参考：https://stackoverflow.com/questions/26835944/uitextview-text-content-doesnt-start-from-the-top

我使用的是这种方法：

override func viewWillAppear(_ animated: Bool) {
        yourTextView.isScrollEnabled = false
        yourTextView.text = "....."
 
 
}

    override func viewDidAppear(_ animated: Bool) {
        yourTextView.isScrollEnabled = true
    }

原理：当插入大量文本，会导致页面scroll向下，所以在viewWillAppear阶段先锁定页面的scroll，然后导入文本，使其不自动向下scroll。然后在viewDidAppear阶段，再允许scroll