app涉及到http访问时,会出现这个错误:App Transport Security has blocked a cleartext HTTP (http://) resource load since it is insecure
解决方法是:
1.打开工程的info.plist:
增加属性App Transport Security Settings;
2.在此属性下添加Allow Arbitrary Loads,并且设置为YES,就可以解决此类问题。