Question

我有一个使用UISplitViewConroller的通用应用。我正在使用故事板。

if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPad) 
{
      UISplitViewController *splitViewController = (UISplitViewController *)self.window.rootViewController;
      UINavigationController *masterNavigationController = [splitViewController.viewControllers objectAtIndex:0];
      LeftViewContrller *lcontroller = (LeftViewContrller *)masterNavigationController.topViewController;
      id<SplitViewDelegate> rightController = (id<SplitViewDelegate>)[splitViewController.viewControllers objectAtIndex:1];
      lcontroller.delegate = rightController; 
}

我有一个UISplitViewController应用程序的左右控制器。

LeftViewController有一个自定义委托，设置为RightViewController。

//Custom delegate

@protocol SplitViewDelegate <NSObject>

- (void) matchSelectionChanged:(NSString *)curSelection;

@end

//LeftViewContoller

@interface LeftViewContrller : UITableViewController {
    id<SplitViewDelegate> _delegate;
    NSMutableArray *_matches;
}
@property (strong) id<SplitViewDelegate> delegate;
@property (strong) NSMutableArray *matches;

@end

RightViewController实现此委托协议。但是，当在LeftViewController中单击单元格内部行时，委托失败。

//RightViewController
@interface RightViewController : UIViewController <SplitViewDelegate>

@property (weak,nonatomic) IBOutlet UILabel *matchLabel;

@end

//Implementation of RightViewController
- (void) matchSelectionChanged:(NSString *)curSelection {
    self.matchLabel.text = curSelection;
    //[self refresh];
}

//Did select row in LeftViewController
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    NSMutableString *s = [[NSMutableString alloc] initWithString:@"Row selected"];
    if (_delegate != nil) {
        [s appendFormat:@" %d ", indexPath.row];
        [_delegate matchSelectionChanged:s]; 
    }
}

//获取错误 CustomViewTab [1200：11303] *由于未捕获的异常'NSInvalidArgumentException'而终止应用程序，原因：' - [UINavigationController matchSelectionChanged：]：无法识别的选择器发送到实例0xda6a770' * 第一次抛出调用堆栈：（0x1559052 0x1da8d0a 0x155aced 0x14bff00 0x14bfce2 0x1204e 0x62071d 0x620952 0x25986d 0x152d966 0x152d407 0x14907c0 0x148fdb4 0x148fccb 0x2500879 0x250093e 0x590a9b 0x1df8 0x1d55）终止调用抛出异常

我看到didSelectRowAtIndex被调用但是然后RightViewController的matchSelectionChanged :( NSString *）curSelection永远不会被调用。

Answer 1

有点老问题，但我偶然发现它并且一眼就看到你有正确的代表吗？

@interface RightViewController : UIViewController <UISplitViewControllerDelegate>

我正在看iOS7所以也许它自iOS5以后就发生了变化

委托未在iOS5 StoryBoard UISplitViewController中设置

1 个答案: