如果我可以,一个简单的问题,任何人都可以解释我在下面缺少的东西,我假设第三个与它有效吗?
@interface ...
// These work
@property(assign) SomeClass *someDelegate;
@property(assign) id someDelegate;
// This gives warning
@property(assign) id <SomeClassDelegate> someDelegate;
@implementation ...
@synthesize someDelegate;
[self setSomeDelegate:[[SomeClass alloc] init]];
[someDelegate setDelegate:self];
warning: method '-setDelegate:' not found (return type defaults to 'id')
// SomeClass.h
#import <Foundation/Foundation.h>
@class SomeClass;
@protocol SomeClassDelegate <NSObject>
@optional
-(void)didHappen:(SomeClass *)someClass;
@required
-(void)willUse:(SomeClass *)someClass withThis:(BOOL)flag;
@end
@interface SomeClass : NSObject {
id <SomeClassDelegate> delegate;
}
@property(assign) id <SomeClassDelegate> delegate;
-(void)otherActions;
@end
欢呼加里。
答案 0 :(得分:3)
Go protocols!
@protocol MyDelegateProtocol
- (NSNumber*) someFunction:(NSArray*) anArray;
@end
@interface MyClass : NSObject {
id<MyDelegateProtocol> delegate;
}
@property id<MyDelegateProtocol> delegate
@end
然后在你的@implementation中:
@synthesize delegate;
据我所知,可可方式: - )
干杯
的Nik
答案 1 :(得分:0)
除非它存在并且您没有显示它,否则您没有setDelegate
方法。不过,你有一个setSomeDelegate
方法。