Question

我有UINavigationBar个按钮，而不是使用自定义视图创建的按钮。我为每个按钮添加了一个带选择器的目标，但是按钮没有响应选择器。你能帮助我吗？

- (void)viewDidLoad
{
    [super viewDidLoad];
    [self.navigationItem setTitle:@"Title"];

    // create custom view
    container = [[UIView alloc] init];
    [container setUserInteractionEnabled:TRUE];

    NSString *path;
    // create 2 buttons and put in a custom view
    buttonList = [[UIButton alloc] init];
    path = [[NSBundle mainBundle] pathForResource:@"dotActive" ofType:@"png"];
    UIImage *imgList = [[[UIImage alloc] initWithContentsOfFile:path] autorelease];
    path = [[NSBundle mainBundle] pathForResource:@"dotInactive" ofType:@"png"];
    UIImage *imgListPrs = [[[UIImage alloc] initWithContentsOfFile:path] autorelease];
    [buttonList setImage:imgListPrs forState:UIControlStateSelected];
    [buttonList setSelected:TRUE];
    [buttonList setFrame:CGRectMake(-30, 0, imgList.size.width, imgList.size.height)];
    [buttonList setImage:imgList forState:UIControlStateNormal];
    [container addSubview:buttonList];
    [buttonList addTarget:self action:@selector(changeType:) forControlEvents:UIControlEventTouchUpInside];
    [buttonList setUserInteractionEnabled:TRUE];


    buttonPic = [[UIButton alloc] init];
    path = [[NSBundle mainBundle] pathForResource:@"dotActive" ofType:@"png"];
    UIImage *imgPic = [[[UIImage alloc] initWithContentsOfFile:path] autorelease];
    path = [[NSBundle mainBundle] pathForResource:@"dotInactive" ofType:@"png"];
    UIImage *imgPicPrs = [[[UIImage alloc] initWithContentsOfFile:path] autorelease];
    [buttonPic setImage:imgPicPrs forState:UIControlStateSelected];
    [buttonPic setFrame:CGRectMake(-10, 0, imgPic.size.width, imgPic.size.height)];
    [buttonPic setImage:imgPic forState:UIControlStateNormal];
    [container addSubview:buttonPic];
    [buttonPic addTarget:self action:@selector(changeType:) forControlEvents:UIControlEventTouchUpInside];
    [buttonPic setUserInteractionEnabled:TRUE];

    // create UIBarButtonItem with a custom view
    UIBarButtonItem *item = [[UIBarButtonItem alloc] initWithCustomView:container];

    // put item on navigation bar
    [self.navigationItem setRightBarButtonItem:item];
}

Answer 1

抱歉Sveta，

我没有看到你的完整代码。请查看它。它会为你工作。

- (void)viewDidLoad{

[super viewDidLoad];

[self.navigationItem setTitle:@"Title"];

    // create custom view
UIView *container = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 250, 30)];
[container setUserInteractionEnabled:TRUE];

    // create 2 buttons and put in a custom view
UIButton *buttonList = [[UIButton alloc] init];
[buttonList setSelected:TRUE];
[buttonList setBackgroundColor:[UIColor redColor]];

[buttonList setFrame:CGRectMake(0, 0, 30.0, 30.0)];
[container addSubview:buttonList];
[buttonList addTarget:self action:@selector(changeType:) forControlEvents:UIControlEventTouchUpInside];
[buttonList setUserInteractionEnabled:TRUE];
[buttonList release];


UIButton *buttonPic = [[UIButton alloc] init];
[buttonPic setFrame:CGRectMake(40.0, 0, 30.0, 30.0)];
[buttonPic setBackgroundColor:[UIColor blueColor]];
[container addSubview:buttonPic];
[buttonPic addTarget:self action:@selector(changeType:) forControlEvents:UIControlEventTouchUpInside];
[buttonPic setUserInteractionEnabled:TRUE];
[buttonPic release];

    // create UIBarButtonItem with a custom view
UIBarButtonItem *item = [[UIBarButtonItem alloc] initWithCustomView:container];

    // put item on navigation bar
[self.navigationItem setRightBarButtonItem:item];
}

- (void)changeType:(id)sender
{
     NSLog(@"Change Type");
}

在Appdelegate中添加此代码

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
// Override point for customization after application launch.

    UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:self.viewController]; 
    self.window.rootViewController = navController;
    [self.window makeKeyAndVisible];
    [navController release]; 
    return YES;
}

Answer 2

我从来没有以编程方式做过。

你可以发布你的changeType吗？

可能看起来像

-(void)changeType:(id)sender {
// doing something here
}

并且应该在接口部分声明;

你也可以在它上面放一个断点来查看它是否完全被调用。并查看变量的值。请检查是否打电话。

编辑：

在我的代码下面，您可以插入默认创建的基于导航的应用程序：

在RootViewController.m上：

- (void)viewDidLoad
{
    [super viewDidLoad];

    UIButton *infoButton = [UIButton buttonWithType:UIButtonTypeInfoLight];
    [infoButton addTarget:self action:@selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside];
    UIBarButtonItem *tmpInfoButton = [[UIBarButtonItem alloc] initWithCustomView:infoButton];
    self.navigationItem.rightBarButtonItem = tmpInfoButton;
    [tmpInfoButton release];

}

-(void)buttonPressed:(id)sender {
    NSLog(@"Button pressed...");
}

在RootViewController.h：

-(void)buttonPressed:(id)sender;

按钮不起作用

2 个答案: