在ios开发中,用到多行输入时一般都会用到UITextView.常见的比如说聊天输入框,评论输入框等,当用户输入多内容时,我们希望高度能根据用户输入的内容扩大而扩大.其实实现这个功能也不是很难,只需要自定义一个类并继承UITextView,然后实现其代理UITextViewDeletage,重写textViewDidChange,只需要在这个方法中进行处理即可.下面开始撸代码: 1.先创建一个类:MyTextView class MyTextView: UITextView,UITextView…
An undirected, connected tree with N nodes labelled 0...N-1 and N-1 edges are given. The ith edge connects nodes edges[i][0]and edges[i][1] together. Return a list ans, where ans[i] is the sum of the distances between node i and all other nodes. Exam…
Given a non-empty string str and an integer k, rearrange the string such that the same characters are at least distance k from each other. All input strings are given in lowercase letters. If it is not possible to rearrange the string, return an empt…