使用Hammer.js是否可以识别对角线滑动?
我已经阅读了他们的文档,但没有找到关于对角线滑动或平移等内容的说明...
eventObject.angle
属性是你要找的东西。它的值在-180到180之间(0表示RIGHT,-90表示UP,90表示DOWN,180表示LEFT)。var hammertime = new Hammer(domElement);
hammertime.get("swipe").set({ direction: Hammer.DIRECTION_ALL });
hammertime.on("swipe", function(eventObject) {
if(eventObject.angle < -90) {
//UP-LEFT SWIPE...
} else if(eventObject.angle < 0) {
//UP-RIGHT SWIPE...
} else if(eventObject.angle < 90) {
//DOWN-RIGHT SWIPE...
} else {
//DOWN-LEFT SWIPE...
}
});
var hammertime = new Hammer(domElement);
hammertime.get("swipe").set({ direction: Hammer.DIRECTION_ALL });
hammertime.on("swipe", function(e) {
let jResult = '';
switch(true) {
// LEFT
case (e.angle < -157.5 || e.angle > 157.5):
jResult = 'left';
break;
// RIGHT
case (e.angle > -22.5 && e.angle < 22.5):
jResult = 'right';
break;
// UP
case (e.angle < -67.5 && e.angle > -112.5):
jResult = 'up';
break;
// Down
case (e.angle > 67.5 && e.angle < 112.5):
jResult = 'down';
break;
// LEFT-Up
case (e.angle < -112.5 && e.angle > -157.5):
jResult = 'left-Up';
break;
// LEFT-Down
case (e.angle > 112.5 && e.angle < 157.5):
jResult = 'left-Down';
break;
// RIGHT-Up
case (-22.5 > e.angle && e.angle > -67.5):
jResult = 'right-Up';
break;
// RIGHT-Down
case (e.angle > 22.5 && e.angle < 67.5):
jResult = 'right-Down';
break;
default:
// code block
jResult = 'unknown'; // UNKNOWN - what happened?
}
console.log('--00--> Swipe: ' + e.direction + ' -- Dir is: ' + jResult);
this.lastSwipe = jResult;
});
输出结果显示在控制台上... 实际效果可能有所不同。