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我無法理解爲什麼我無法設置委託。我使用UINavigationController在兩個視圖之間切換。這裏是我的代碼代表問題
SecondViewProtocol.h
#import <Foundation/Foundation.h>
@protocol SecondViewProtocol <NSObject>
@required
-(void)textFieldDidChange:(NSString *)data;
@end
SecondView.h
#import <UIKit/UIKit.h>
#import "SecondViewProtocol.h"
@interface SecondView : UIViewController
@property (nonatomic, retain) id<SecondViewProtocol>delegate;
@end
SecondView.m
@synthesize delegate = _delegate;
.......
-(IBAction)textFieldReturn:(id)sender
{
[[self delegate] textFieldDidChange:[self.textField text]];
}
.......
我在FirstView.h進口SecondViewProtocol.h
FirstView.m
....
SecondView *secondView = [[SecondView alloc]init];
secondView.delegate = self;
....
這裏我從不兼容的類型FirtView分配到的ID。
這裏有什麼問題?