ios - 在 Storyboard 中以模态序列传递数据？

Question

我真正的问题是我想通过 将数据从 childViewController 传递到 Storyboard 中的 parentViewController模态序列 .

代码

父 View Controller .h

@property (strong, nonatomic)NSMutableArray *address;

childViewController.m

parentViewController *parent=(parentViewController *)self.presentingViewController;
post.address=@"Hello World";

此代码抛出 异常 像

Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[MainTabbarViewController setAddress:]: unrecognized selector sent to instance 0x7fa070e6b910'

Storyboard结构

TabbarController-> NavigationController-> parentViewController-> childViewController

先感谢您。

Answer 1

正确的方法是使用委托(delegate)

在 ChildViewController.h

@protocol ChildDelegate 
- (void)postAddress:(NSString *)address;
@end 
@interface ChildViewController
@property (nonAtomic, assign) id<ChildDelegate> delegate;
@end

在 ChildViewController.m

[self.delegate postAddress:address];

在 ParentViewController.h

@interface ParentViewController <ChildDelegate>
@end

在 ParentViewController.m

// presenting childViewController
- (void)presentChildViewController {   
    ChildViewController *childViewController = [[ChildViewController alloc]init];
    childViewController.delegate = self;
    [self presentViewController:childViewController animated:YES completion:nil];
}


// delegate method
- (void)postAddress:(NSString *)address{
    // add you code here
}