finishCanvas(){

var self=this

ctx.draw(true,function (e) {

console.log(‘draw callback’)

wx.canvasToTempFilePath({

x: 0,

y: 0,

width: 680,

height: 570,

destWidth: 100,

destHeight: 100,

canvasId: ‘myCanvas’,

success: function (res) {

self.setData({

pic: res.tempFilePath

})

console.log(self.data.pic)

wx.navigateTo({

url: ‘/pages/pay/pay?pic=’ + self.data.pic + ‘&pic_title=’ + self.data.pic_title

})

},

fail:function(res){

console.log(“保存图片返回路径调用失败”)

}

},this)

})

},