iphone - UIBarButtonItem 操作不起作用。为什么？

Question

谢谢大家。我找到了真正有效的代码。它看起来像:

- (void)viewDidLoad {
    [super viewDidLoad];

     UIButton* infoButton = [UIButton buttonWithType: UIButtonTypeInfoLight];
     [infoButton addTarget:self action:@selector(settingsClick) forControlEvents:UIControlEventTouchDown];

     UIBarButtonItem* theSettingsButton =[[UIBarButtonItem alloc]initWithCustomView:infoButton];

     [self.toolbar setItems:[NSArray arrayWithObjects:theSettingsButton,nil]];

     [theSettingsButton release];
}

Answer 1

这有效:

- (void)viewDidLoad {
    [super viewDidLoad];

    UIBarButtonItem *theSettingsButton = [[[UIBarButtonItem alloc]
                                           initWithTitle:@"Settings" style:UIBarButtonItemStyleBordered
                                           target:self action:@selector(settingsClick)] autorelease];

}

-(void)settingsClick
{    
    NSLog(@"Hello");
}

您尚未关闭 viewDidLoad 方法。