废话不多说,直接写代码,兼容pc和mobile
Vue.directive('longpress', {
bind: function(el, binding, vNode) {
// 确保提供的表达式是函数
if (typeof binding.value !== 'function') {
// 获取组件名称
const compName = vNode.context.name;
// 将警告传递给控制台
let warn = `[longpress:] provided expression '${binding.expression}' is not a function, but has to be `;
if (compName) { warn += `Found in component '${compName}' `}
console.warn(warn);
}
// 定义变量
let pressTimer = null;
// 定义函数处理程序
// 创建计时器( 1秒后执行函数 )
let start = (e) => {
if (e.type === 'click' && e.button !== 0) {
return;
}
if (pressTimer === null) {
pressTimer = setTimeout(() => {
// 执行函数
handler();
}, 1000)
}
}
// 取消计时器
let cancel = (e) => {
// 检查计时器是否有值
if ( pressTimer !== null ) {
clearTimeout(pressTimer);
pressTimer = null;
}
}
// 运行函数
const handler = (e) => {
// 执行传递给指令的方法
binding.value(e)
}
// 添加事件监听器
el.addEventListener("mousedown", start);
el.addEventListener("touchstart", start);
// 取消计时器
el.addEventListener("click", cancel);
el.addEventListener("mouseout", cancel);
el.addEventListener("touchend", cancel);
el.addEventListener("touchcancel", cancel);
}
})