我想知道是否有可能在一条线路中绑定骨干网中的多个事件类型。
请考虑以下事项:
var MyView = Backbone.View.extend({
id: 'foo',
events: {
'click .bar': 'doSomething',
'touchstart .bar': 'doSomething'
},
doSomething: function(e) {
console.log(e.type);
}
});
基本上我想知道的是,是否可以将'click'和'touchstart'的事件绑定组合成一行 - 沿着以下几行:
events: { 'click,touchstart .bar': 'doSomething' }
任何建议都将不胜感激。
答案 0 :(得分:18)
视图jQuery事件是不可能的,它们通过delegateEvents
绑定。不过它是possible for backbone events:
book.on("change:title change:author", ...);
答案 1 :(得分:15)
对于任何感兴趣的人,我最终在Backbone.View中覆盖了delegateEvents
。
只有少数修改过的行才能获得所需的功能。
您可以在commit on github
中看到差异以下是delegateEvents
处于修改状态:
delegateEvents: function(events) {
if (!(events || (events = getValue(this, 'events')))) return;
this.undelegateEvents();
for (var key in events) {
var method = events[key];
if (!_.isFunction(method)) method = this[events[key]];
if (!method) throw new Error('Method "' + events[key] + '" does not exist');
var match = key.match(delegateEventSplitter);
var eventTypes = match[1].split(','), selector = match[2];
method = _.bind(method, this);
var self = this;
_(eventTypes).each(function(eventName) {
eventName += '.delegateEvents' + self.cid;
if (selector === '') {
self.$el.bind(eventName, method);
} else {
self.$el.delegate(selector, eventName, method);
}
});
}
}
答案 2 :(得分:1)
我们也可以这样做。 具有管理每个事件之间空间的优势。
直接在Backbone中添加它:
delegateEvents: function(events) {
events || (events = _.result(this, 'events'));
if (!events) return this;
this.undelegateEvents();
for (var key in events) {
var method = events[key];
if (!_.isFunction(method)) method = this[method];
if (!method) continue;
var match = key.match(delegateEventSplitter);
this.delegate(match[1], match[2], _.bind(method, this));
}
return this;
}
覆盖delegateEvents方法:
Backbone.View.prototype.originalDelegateEvents = Backbone.View.prototype.delegateEvents;
Backbone.View.prototype.delegateEvents = function(events) {
events || (events = _.result(this, 'events'));
if (!events) return this;
this.undelegateEvents();
for (var key in events) {
var method = events[key], combinedEvents = key.split(',');
if (!_.isFunction(method)) method = this[method];
if (!method) continue;
for(var i = 0, match = null; i < combinedEvents.length; ++i) {
match = combinedEvents[i].trim().match(/^(\S+)\s*(.*)$/);
this.delegate(match[1], match[2], _.bind(method, this));
}
}
return this;
};
我们现在可以在一行中管理事件:
events: {
'click a[data-anchor], wheel, keydown': 'scroll'
}