摘要： 在网上查了下，有网友说是因为有变量重名，仔细检查了下代码，UIGraphicsEndImageContext()写成uigraphicsendimagecontext()了，改过来就编译通过了。 阅读全文

摘要： 在网上看到两种解决办法：第一种：设置自动引用计数关闭You need to turn offAutomatic Reference Counting. You do this by clicking on your project in the navigator (the top item in the finder-like thing on the left), then click on your target, select"Build Settings"and turn off the option"Objective-C Automatic Refe 阅读全文