1、xcode7/ios 访问网络报错：The resource could not be loaded because the App Transport Security policy requires the use of a secure connection.

解决方案:

iOS9引入了新特性ATS，要求App内的访问网络必须使用HTTPS协议！

2、使用NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:fileURL] options:0 error:&error];

不显示图片的可能原因也是上面的原因

The resource could not be loaded because the App Transport Security policy requires the use of a secure connection.

原文：http://www.cnblogs.com/yinyanlyy/p/5439857.html