错误：App Transport Security has bl

** App Transport Security has blocked a cleartext HTTP (http://) resource load since it is insecure. Temporary exceptions can be configured via your app's Info.plist file.**

解决方案：
1、在Info.plist中添加 NSAppTransportSecurity 类型 Dictionary ;
2、在 NSAppTransportSecurity 下添加 NSAllowsArbitraryLoads 类型Boolean ,值设为 YES;