<view bindtouchstart="touchstart" bindtouchend="touchend">123456</view>

//touch start
touchstart: function(e) {    
    this.startTime = e.timeStamp;
    console.log(this.startTime)   
},  

//touch end 
touchend: function(e) {    
    this.endTime = e.timeStamp;   
    console.log(this.endTime)     
    console.log("endTime - startTime = " + (this.endTime-this.startTime)); 
    if (this.endTime - this.startTime>600){      
    console.log('长按')   
    }  
}