H5一键复制 兼容iOS

navigator.clipboard.writeText('需要复制的文本').then(() => {
    console.log('文本已复制到剪贴板');
}).catch(err => {
    // 如果用户拒绝剪贴板权限，则可能发生这种情况
    console.error('无法复制文本: ', err);
});

navigator.clipboard.readText().then(text => {
    console.log('粘贴的内容: ', text);
}).catch(err => {
    console.error('无法读取剪贴板内容: ', err);
});

document.addEventListener('paste', event => {
    event.preventDefault();
    navigator.clipboard.getText().then(text => {
        console.log('Pasted text: ', text);
    });
});

// 复制
onCopy(val) {
    if (navigator.clipboard) {
        return navigator.clipboard.writeText(val).then(text => {
            Toast.success("复制成功");
        }).catch(err => {
            this.onExecCommand(val);
        });;
    } else {
        this.onExecCommand(val);
    }
},
onExecCommand(val) {
    let input = document.createElement('input');
    input.setAttribute('readonly', 'readonly');
    input.setAttribute('value', val);
    input.style.position = "absolute";
    input.style.opacity = 0;
    input.style.left = "-999999px";
    input.style.top = "-999999px";
    document.body.appendChild(input);
    input.focus();
    input.select();
    input.setSelectionRange(0, 9999);
    if (document.execCommand('copy')) {
        document.execCommand('copy');
        Toast.success("复制成功");
    }
    document.body.removeChild(input);
}