Using block to realize the traditional values between two pages

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the second view Make a statement block attribute :

@property (nonatomic, copy) void(^doTransferMsg)(NSString *_msg);

Then check in the value transmission method block Does it exist

– (IBAction)transferText:(UIButton *)sender { if (_doTransferMsg) { _doTransferMsg(@”hello there”); _doTransferMsg = nil; } [self.navigationController popViewControllerAnimated:YES]; }

Lord View in . Create a second view When . Realize this by the way block

– (IBAction)LoadDetailView:(UIButton *)sender { [ibTextLabel setText:nil]; DetailViewController *_curDetail = [[DetailViewController alloc] initWithNibName:@”DetailViewController” bundle:nil]; [_curDetail setDoTransferMsg:^(NSString *_msg) { dispatch_async(dispatch_get_main_queue(), ^{ [ibTextLabel setText:_msg]; }); }]; [self.navigationController pushViewController:_curDetail animated:YES]; [_curDetail release]; }

that’s all

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