Question

当我单击ViewController1上的按钮时，我出现了一个弹出式tableview（ViewController2）。然后，当我在表中选择一行时，我希望将这些值发送回ViewController1。我有一个NSDictionary设置。它在常规导航控制器中工作正常，但尝试使用dismissModalViewControllerAnimated，因此tableview下降，数据出现在第一个视图中。

我认为这与此问题类似：http://www.iphonedevsdk.com/forum/iphone-sdk-development/39995-return-data-dismissmodalviewcontrolleranimated.html

这是我的代码：

ViewController1.h：

@protocol ViewController1Delegate;
@interface ViewController1 : UIViewController <ViewController2Delegate> {
    id <ViewController1Delegate> delegate;
}
@property (nonatomic, assign) id <ViewController1Delegate> delegate;
@end
@protocol ViewController1Delegate
- (void)viewController1DidFinish:(ViewController1 *)controller;
@end

ViewController1.m：

-(void)buttonGoToViewController2 {
    ViewController2 *controller = [[ViewController2 alloc] initWithNibName:@"ViewController2" bundle:nil];

//  this controller.delegate = self causes it to crash if i have it uncommented for some reason...
//  controller.delegate = self;

    controller.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
    [self presentModalViewController:controller animated:YES];
    [controller release];
}

ViewController2.m：

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {

    if(searching) {
        // Navigation logic may go here. Create and push another view controller.
        NSDictionary *selectedCountry = [self.copyListOfItems objectAtIndex:indexPath.row];
        ViewController1 *dvController = [[ViewController1 alloc] initWithNibName:@"ViewController1" bundle:nil andDictionary: selectedCountry];
        NSLog(@"selected hit this %@",selectedCountry);
        // Pass the selected object to the new view controller.
        [self.navigationController pushViewController:dvController animated:YES];
        [dvController release];
        [self dismissModalViewControllerAnimated:YES];

    }
    else {
        // Navigation logic may go here. Create and push another view controller.
        NSDictionary *dictionary = [self.listOfItems objectAtIndex:indexPath.row];
        ViewController1 *dvController = [[ViewController1 alloc] initWithNibName:@"ViewController1" bundle:nil andDictionary: dictionary];
        NSLog(@"normal hit this %@",dictionary);
        // Pass the selected object to the new view controller.
        [self.navigationController pushViewController:dvController animated:YES];
        [dvController release];     
    }
}

Answer 1

在ViewController2代码中，您将创建一个新的ViewController1对象并为其提供NSDictionary。当您关闭ViewController2时，您将返回到原始 ViewController1，它从未到过任何地方，并且从未发送过NSDictionary。您需要为ViewController2提供对呈现它的ViewController1对象的访问权限（我建议通过委托模式进行）以便在那里设置NSDictionary。

从弹出tableview返回NSDictionary数据

1 个答案: