The react - native ios HTTP request Network request failed-CodePudding

Has been in the demo/ios/demo/Info. The plist add

 
 NSAllowsArbitraryLoads

Why or not?
This is the error message:

 
 TypeError: Network request failed 
At the fetch. Umd. Js: 535 
The at JSTimers. Js: 231 
At _callTimer (JSTimers. Js: 123) 
At the Object. CallTimers (JSTimers. Js: 379) 
The at MessageQueue. __callFunction (MessageQueue. Js: 414) 
The at MessageQueue. Js: 113 
The at MessageQueue. __guard (MessageQueue. Js: 365) 
The at MessageQueue. CallFunctionReturnFlushedQueue (MessageQueue. Js: 112) 
The at debuggerWorker. Aca173c4. Js: 4

12 the ios simulator version for the iphone: 14.4

Please teach bosses farther ~ ~ ~