2019独角兽企业重金招聘Python工程师标准>>> 
saveImg: function () {
var that = this;
if ((that.data.codePic == '') || (that.data.codePic == null)) {
app.basic_dialog('图片加载失败');
return false;
}
wx.getSetting({
success: function(res) {
if (res.authSetting["scope.writePhotosAlbum"] == false) {
app.confirm_dialog('授权提醒', '您还未授权保存相册，请授权', function(res) {
if (res.confirm == true) {
wx.openSetting({
success: function(res) {
if (res.authSetting["scope.writePhotosAlbum"] == true) {
// 保存相册
that.saveImg();
} else {
app.toast_none('授权失败');
that.setData({
chat: false
});
}
}
});
}
})
} else {
// 下载这个图片
wx.downloadFile({
url: that.data.codePic,
success: function (res) {
wx.saveImageToPhotosAlbum({
filePath: res.tempFilePath,
success: function (response) {
if (response.errMsg == "saveImageToPhotosAlbum:ok") {
app.toast_none('下载成功', function () {
that.setData({
chat: false
});
});
}
}
});
},
fail: function() {
app.toast_none('下载资源失败');
}
});
}
}
});
},
第二版优化， 解决第一次点击，反应时间比较长的问题
var that = this;
if ((that.data.codePic == '') || (that.data.codePic == null)) {
app.basic_dialog('图片加载失败');
return false;
}
if (that.data.loading) {
return false;
}
that.data.loading = true;
that.setData({
loading: that.data.loading
});
// 判断用户是否授权
wx.getSetting({
success: function(res) {
if (res.authSetting["scope.writePhotosAlbum"] == false) {
app.confirm_dialog('授权提醒', '您还未授权保存相册，请授权', function(res) {
if (res.confirm == true) {
wx.openSetting({
success: function(res) {
if (res.authSetting["scope.writePhotosAlbum"] == true) {
// 保存相册
that.saveImg();
} else {
app.toast_none('授权失败');
that.setData({
chat: false
});
}
}
});
}
that.data.loading = false;
that.setData({
loading: that.data.loading
});
})
} else {
// 下载这个图片
wx.downloadFile({
url: that.data.codePic,
success: function (res) {
wx.saveImageToPhotosAlbum({
filePath: res.tempFilePath,
success: function (response) {
if (response.errMsg == "saveImageToPhotosAlbum:ok") {
app.toast_none('下载成功', function () {
that.setData({
chat: false
});
});
}
}
});
that.data.loading = false;
that.setData({
loading: that.data.loading
});
},
fail: function() {
app.toast_none('下载资源失败');
that.data.loading = false;
that.setData({
loading: that.data.loading
});
}
});
}
}
});