iOS delegate 传值步骤

iOS  delegate 传值步骤

 A.h

@protocol  MyDelegate
- (void )mjFuncWithString:(NSString*)str;

@end

@interface MyViewController :
UIViewController

@property (assign)
id<MyDelegate> delegate;

@end

A.m

 [self.delegate
mjFuncWithString:self.t.text];

B.h

@interface ViewController :
UIViewController<MyDelegate>

B.m

 MyViewController * svc=[[MyViewController
alloc]initWithNibName:@"MyViewController"
bundle:[NSBundle
mainBundle]];
    svc.delegate=self;

    [self
presentViewController:svc animated:YES
completion:nil];

//实现方法

-(void)mjFuncWithString:(NSString*)str{
      
}