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copytext

h5实现一键复制到粘贴板 兼容ios

实现原理

采用document.execCommand('copy')来实现复制到粘贴板功能

复制必须是选中input框的文字内容,然后执行document.execCommand('copy')命令实现复制功能。 初步实现方案

const input = document.querySelector('#copy-input');
    if (input) {
      input.value = text;
      if (document.execCommand('copy')) {
        input.select();
        document.execCommand('copy');
        input.blur();
        alert('已复制到粘贴板');
      }
    }

兼容性问题

  1. input 输入框不能hidden或者display: none; 如果需要隐藏输入框可以使用定位脱离文档流,然后移除屏幕
#copy-input{
position: absolute;
left: -1000px;
z-index: -1000;
}

2.ios下不能执行document.execCommand('copy')

在ios设备下alert(document.execCommand('copy'))一直返回false 查阅相关资料发现ios下input不支持input.select();

因此拷贝的文字必须存在,不能为空字符串,不然也不会执行复制空字符串的功能

参考这篇博客实现了ios下复制的功能 https://blog.csdn.net/VLilyV/article/details/77523591

主要是使用textbox.createTextRange方法选中输入框的文字

// input自带的select()方法在苹果端无法进行选择,所以需要自己去写一个类似的方法
// 选择文本。createTextRange(setSelectionRange)是input方法
function selectText(textbox, startIndex, stopIndex) {
  if (textbox.createTextRange) {//ie
    const range = textbox.createTextRange();
    range.collapse(true);
    range.moveStart('character', startIndex);//起始光标
    range.moveEnd('character', stopIndex - startIndex);//结束光标
    range.select();//不兼容苹果
  } else {//firefox/chrome
    textbox.setSelectionRange(startIndex, stopIndex);
    textbox.focus();
  }
}

3.ios设备上复制会触发键盘弹出事件

给input加上readOnly只读属性

代码

踩完以上的坑,总结的代码如下 git地址 https://github.com/zhaosheng808/copytext

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