Extjs使用Ext.function.bind, 给句柄函数传参

showSelectImageWindow: function() {
        var me = this.getView();
        this.selectImage(Ext.Function.bind(this.updateImage, this, ‘imageUrl‘, true));
    },
    
    showSelectLogoWindow: function() {
        var me = this.getView();
        this.selectImage(Ext.Function.bind(this.updateImage, this, ‘logoUrl‘, true));
    },
    
    showSelectPhotoWindow: function() {
        var me = this.getView();
        this.selectImage(Ext.Function.bind(this.updateImage, this, ‘bzLicensePhotoUrl‘, true));
    },
    
    selectImage: function(callback) {
        if (!this.imgWindow) {
            this.imgWindow = Ext.create(‘app.ux.window.SelectImageWindow‘, {
                callback: callback
            });
        } else {
            Ext.apply(this.imgWindow, {callback: callback});
        }
        this.imgWindow.show();
    },
    
    updateImage: function(url, title, uploadId, key) {
        this.getView().getViewModel().set(key, url);
    },