在iOS 中创建自定义Delegates properties with ARC错误的解决方法

错误提示：error: Automatic Reference Counting Issue: Existing ivar 'delegate' forunsafe_unretained property 'delegate' must
be __unsafe_unretained

解决方法：

将原来的：

@interface CustomeView
: UIViewController

{

id <CustomeDelegate> delegate;

}

@property (nonatomic, assign) id <CustomeDelegate>
delegate;

修改为：

@interface CustomeView : UIViewController

{

__unsafe_unretained id <CustomeDelegate >
delegate;

}

@property (nonatomic, assign) id <CustomeDelegate>
delegate;