The failure of the iPhone to connect to the appstore on wifi may be caused by network problems and system problems. The solutions are as follows: 1. The network connection signal is not good, so it is recommended to replace it with another network signal connection. 2, if the network is normal, there are two main reasons: DNS problems; In iPhone Settings, turn on the wireless LAN, scroll down in the Wi-Fi Network Details section, find the DNS option, and type 114.114.114.114 or 8.8.8.8 to resolve. 3, if there is a problem with the Apple server, then it is recommended to try downloading after a period of time. 4, log out of the Apple ID account, and then log in again. 5, open the Settings, enter general, then click restore, restore the network Settings to see if you can solve the problem. 6, in addition, there may be problems with the system, shut down the device and restart it, or rebrush the device system.