控制台打印：Application 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.
原因是：苹果官方为了安全使用了HTPPS 作为安全访问链接，如果想继续使用http
解决办法：修改info.plist文件
在 App Transport Security Settings 添加: Allow Arbitrary Loads 设置为YES
