https://developers.weixin.qq.com/miniprogram/dev/api/location/wx.getLocation.html

如下为核心代码。当用户未开启系统定位时，这段代码的第一个getLocation会阻塞第二个getLocation，进而阻塞chooseImage。

wx.getLocation({
    success() {
        console.log('getLocation success');
    },
    fail() {
        console.log('getLocation fail');
    },
});
wx.getLocation({
    success() {
        console.log('getLocation success');
    },
    fail() {
        console.log('getLocation fail');
    },
});
wx.chooseImage({
    complete() {
        console.log('getLocalImgData start');
        wx.getLocalImgData({
            complete() {
                console.log('getLocalImgData end');
            },
        });
    },
});