带有自定义视图选择器的UIBarButtonItem init无法正常工作

Question

我花了几个小时的时间试图让左按钮正常工作，并模仿后退按钮。

我的代码创建按钮：

UIBarButtonItem *backButton = [self customBarButton:@"back_button" imageHiglighted:@"settings_button_highlighted" x:20 y:0 widthDivider:2.6 heightDivider:2.6];
backButton.target = self;
backButton.action = @selector(buttonPressed:);
self.navigationItem.leftBarButtonItem = backButton;

这里调用的方法来创建自定义按钮：

- (UIBarButtonItem *)customBarButton:(NSString *)imageDefault imageHiglighted:(NSString *)imageHighlighted x:(float)x y:(float)y widthDivider:(float)widthDivider heightDivider:(float)heightDivider {
UIImage *customImageDefault = [UIImage imageNamed:imageDefault];
UIImage *customImageHighlighted = [UIImage imageNamed:imageHighlighted];
CGRect frameCustomButton = CGRectMake(x, y, customImageDefault.size.width/widthDivider, customImageDefault.size.height/heightDivider);
UIButton *customButton = [[UIButton alloc] initWithFrame:frameCustomButton];
[customButton setBackgroundImage:customImageDefault forState:UIControlStateNormal];
[customButton setBackgroundImage:customImageHighlighted forState:UIControlStateHighlighted];
UIBarButtonItem *barCustomButton =[[UIBarButtonItem alloc] initWithCustomView:customButton];
return barCustomButton;
}

行动：

-(void)buttonPressed:(id) sender{
    NSLog(@"Entered");
    SearchViewController *ViewController = [[SearchViewController alloc] init];
    [self.navigationController pushViewController:ViewController animated:YES];
}

所以我可以用一个简单的UIButton，但不能用UIButtonBarItem，我真的不知道它发生了什么

如果你能帮助我，我将不胜感激。

谢谢。

Answer 1

将selector添加到自定义button，因为它是bar的view，而不是

[customButton addTarget:self action:@selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside];

编辑：注意：UIBarButtonItem的target和action适用于custom views。

Answer 2

UIButton *button =  [UIButton buttonWithType:UIButtonTypeCustom];
[button setImage:[UIImage imageNamed:@"goback.png"] forState:UIControlStateNormal];
[button addTarget:self action:@selector(//HERE ! i don't know put what thing !) forControlEvents:UIControlEventTouchUpInside];
[button setFrame:CGRectMake(0, 0, 32, 32)];
self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:button];

Answer 3

尝试此

self.navigationItem.leftBarButtonItem=[[UIBarButtonItem alloc] initWithCustomView:[GlobalMethods buttonWithImage:@"top-nav-back" heighlightImageName:nil buttonFrame:CGRectMake(102, 1, 50, 30) selectorName:@selector(btnBackClicked:) target:self]];

+ (UIButton*)buttonWithImage:(NSString*)normalImageName heighlightImageName:(NSString*)heighlightImageName buttonFrame:(CGRect)buttonFrame selectorName:(SEL)selectorName target:(id)target
{
    UIButton *objButton = [UIButton buttonWithType:UIButtonTypeCustom];
    [objButton setFrame:buttonFrame];
    [objButton addTarget:target action:selectorName forControlEvents:UIControlEventTouchUpInside];
    [objButton setImage:[GlobalMethods getImageFromResourceBundle:normalImageName] forState:UIControlStateNormal];
    if(heighlightImageName)
        [objButton setImage:[GlobalMethods getImageFromResourceBundle:heighlightImageName] forState:UIControlStateDisabled];
    if(heighlightImageName)
        [objButton setImage:[GlobalMethods getImageFromResourceBundle:heighlightImageName] forState:UIControlStateSelected];
    return objButton;
}

Answer 4

试试这个。。

[customButton addTarget:self action:@selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside];

在您的customBarButton方法中。。我的意思是说把选择器给你的按钮，而不是条形按钮项目。。

检查并回复。。

Answer 5

只需将这一行放在代码中即可。。

[backButton addTarget:self action:@selector(backBtnPressed:) forControlEvents:UIControlEventTouchUpInside];

Answer 6

这对我有效

UIButton * tmpButton = [self generateButtonwithImageName:@"Back.png" andSize:CGRectMake(0, 0, 55, 30)];
UIBarButtonItem * backButton = [[UIBarButtonItem alloc] initWithCustomView:tmpButton];
[tmpButton addTarget:self action:@selector(reload) forControlEvents:UIControlEventTouchUpInside];
self.navigationItem.leftBarButtonItem=backButton;

-(UIButton*)generateButtonwithImageName :(NSString*)imageName andSize:(CGRect)rect{
  UIButton * button = [UIButton buttonWithType:UIButtonTypeCustom];
  button.frame=rect;
  [button setBackgroundImage:[UIImage imageNamed:imageName] forState:UIControlStateNormal];
  return button;
}

Answer 7

//为我工作

if([version floatValue] < 7.0)
{
    [self.navigationController.navigationBar setBackgroundImage:[UIImage imageNamed:@"navi-bar.png"] forBarMetrics:UIBarMetricsDefault];
    self.navigationController.navigationBar.opaque = YES;
    closeButton = [[UIButton alloc]initWithFrame:CGRectMake(0, 0, 35, 30)];
    [closeButton setImage:[UIImage imageNamed:@"btn_end.png"] forState:UIControlStateNormal];
    [closeButton setImage:[UIImage imageNamed:@"btn_end_on.png"] forState:UIControlStateHighlighted];
    [closeButton addTarget:self action:@selector(actionClose) forControlEvents:UIControlEventTouchUpInside];

    self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc]initWithCustomView:closeButton];
}
else{

    /*add button back to navigation*//*add buttom back to navigation*/
    UIBarButtonItem *itemBack = [[UIBarButtonItem alloc]initWithTitle:@"完了" style:UIBarButtonItemStylePlain target:self action:@selector(actionClose)];
    self.navigationItem.rightBarButtonItem = itemBack;
}