protocol delegate 사용방법

xxx.h

@protocol delegate명;

@property(nonatomic, retain) id<delegate명> delegate;

맨 밑에

@protocol delegate명 <NSObject>

- (void)delegate_method:(returnType)variable;

@end

xxx.m

@synthesize delegate=_delegate;

[_delegate release];

- (id)initWithDelegate:(id<delegate명>)delegate {

self = [self init];

if(self) {

[self setDelegate:delegate];

}

}

delegate보낼 method 안에는

if([self.delegate respondsToSelector:@selector(delegate_method명:)]) {

[self.delegate delegate_method명:variable];

}

delegate 구현

- (void)delegate_method:(returnType)variable {

NSLog(@"%@", variable);

}