zoukankan      html  css  js  c++  java
  • iosiOStextView实现文字高度自适应

    跟为textView设置提示性文字一样   需要在textView的代理方法中实现如下

    如有偏差  请谅解

    定义UITextView,实现UITextViewDelegate:

    -(UITextView *)textView{
        if (!_textView) {
            //http://www.cnblogs.com/xiaofeixiang/
            _textView=[[UITextView alloc]initWithFrame:CGRectMake(30, 200, CGRectGetWidth([[UIScreen mainScreen] bounds])-60, 30)];
            [_textView setTextColor:[UIColor redColor]];
            [_textView.layer setBorderColor:[[UIColor blackColor] CGColor]];
            [_textView setFont:[UIFont systemFontOfSize:15]];
            [_textView.layer setBorderWidth:1.0f];
            [_textView setDelegate:self];
        }
        return _textView;
    }
     
    -(void)textViewDidChange:(UITextView *)textView{
        //博客园-FlyElephant
        static CGFloat maxHeight =60.0f;
        CGRect frame = textView.frame;
        CGSize constraintSize = CGSizeMake(frame.size.width, MAXFLOAT);
        CGSize size = [textView sizeThatFits:constraintSize];
        if (size.height<=frame.size.height) {
            size.height=frame.size.height;
        }else{
            if (size.height >= maxHeight)
            {
                size.height = maxHeight;
                textView.scrollEnabled = YES;   // 允许滚动
            }
            else
            {
                textView.scrollEnabled = NO;    // 不允许滚动
            }
        }
        textView.frame = CGRectMake(frame.origin.x, frame.origin.y, frame.size.width, size.height);
    }
  • 相关阅读:
    Ubuntu 查看网关地址方法
    cf451C-Predict Outcome of the Game
    C语言运算符优先级
    文件的概念以及VC里的一些文件操作API简介
    关于空指针NULL、野指针、通用指针
    由字符串常量引发的思考
    数字三角形问题
    cdoj第13th校赛初赛F
    cdoj第13th校赛初赛H
    cdoj第13th校赛初赛L
  • 原文地址:https://www.cnblogs.com/sunfuyou/p/6182136.html
Copyright © 2011-2022 走看看