Why is there a bunch of garbled code in the appstore of iphone6s?

First, open the "Settings" application on the main screen of Apple's mobile phone.

Click the Wireless LAN bar at the top of the settings list.

Then click the exclamation point icon to the right of the currently accessed wireless network.

In the WLAN parameters list, click the DNS column.

Then delete the original DNS address, enter the new address of 8.8.8.8, and click "WLAN" in the upper left corner to return.

Next, please open the background multitasking management interface of Apple's mobile phone and close the App Store from the background. Here, take the iOS7 system as an example, and drag the App Store from the background.

Finally, reopen the App Store, and you should be able to access it normally.