在导航控制器类的类别中添加左右栏按钮项

Posted 2023-02-26

【中文标题】在导航控制器类的类别中添加左右栏按钮项

【英文标题】：Add left and right bar button item in category of navigation controller class

【发布时间】：2014-01-06 12:15:20

【问题描述】：

我已经创建了一个导航控制器类别并在视图中设置标题和左右栏按钮确实加载了这个导航控制器类（这个类的类别）。

- (void)viewDidAppear:(BOOL)animated


        NSArray *ver = [[UIDevice currentDevice].systemVersion componentsSeparatedByString:@"."];
        if ([[ver objectAtIndex:0] intValue] >= 7) 
            self.navigationBar.barTintColor = [UIColor colorWithRed:229.0f/255.0f green:114.0f/255.0f blue:89.0f/255.0f alpha:1.0f];
            self.navigationBar.translucent = NO;
        else
            self.navigationBar.tintColor = [UIColor colorWithRed:229.0f/255.0f green:114.0f/255.0f blue:89.0f/255.0f alpha:1.0f];
        

        UILabel *lblTitleView=[[UILabel alloc]initWithFrame:CGRectMake(0, 0, 170, 44)];
        [lblTitleView setTextColor:[UIColor whiteColor]];
        [lblTitleView setFont:[UIFont boldSystemFontOfSize:17]];
        [lblTitleView setText:[self SetnavigationTitle:self.navigationItem.title]];
        [lblTitleView setTextAlignment:NSTextAlignmentCenter];
        [lblTitleView setBackgroundColor:[UIColor clearColor]];
        [self.navigationItem setTitleView:lblTitleView];

       // UINavigationController*navCnt = [[UINavigationController alloc] init];

      UIButton *btnLeft=[UIButton buttonWithType:UIButtonTypeCustom];
        [btnLeft setFrame:CGRectMake(0, 5, 32, 32)];
        [btnLeft setImage:[UIImage imageNamed:@"btn_back.png"] forState:UIControlStateNormal];
        [btnLeft setImage:[UIImage imageNamed:@"btn_back.png"] forState:UIControlStateHighlighted];
         [btnLeft setTitle:[NSString stringWithFormat:@"%@",[self SetleftbarbuttonTitle:self.navigationItem.leftBarButtonItem.title]] forState:UIControlStateNormal];
        [btnLeft setTintColor:[UIColor grayColor]];
        [btnLeft setBackgroundColor:[UIColor greenColor]];

        [btnLeft setTag:101];
        [btnLeft addTarget:self action:@selector(btnAction:) forControlEvents:UIControlEventTouchUpInside];
        UIBarButtonItem *leftBarButton=[[UIBarButtonItem alloc]initWithCustomView:btnLeft];
        [self.navigationItem  setLeftBarButtonItem:leftBarButton];
        self.navigationItem.hidesBackButton=YES;


       UIButton *btnRight=[UIButton buttonWithType:UIButtonTypeCustom];
        [btnRight setFrame:CGRectMake(270, 5, 32, 32)];
        [btnRight setImage:[UIImage imageNamed:@"btn_back.png"] forState:UIControlStateNormal];
        [btnRight setImage:[UIImage imageNamed:@"btn_back.png"] forState:UIControlStateHighlighted];
        [btnRight setTitle:[NSString stringWithFormat:@"%@",[self SetRightbarbuttonTitle:self.navigationItem.rightBarButtonItem.title]] forState:UIControlStateNormal];
        [btnRight setTintColor:[UIColor clearColor]];
        [btnRight setBackgroundColor:[UIColor greenColor]];


         [btnRight setTag:102];
        [btnRight addTarget:self action:@selector(btnAction:) forControlEvents:UIControlEventTouchUpInside];
        UIBarButtonItem *rightBarButton=[[UIBarButtonItem alloc]initWithCustomView:btnRight];

        [self.navigationItem setRightBarButtonItem:rightBarButton];

        [super viewDidAppear:animated];

当我只是从任何视图控制器传递标题时，它对每个视图控制器都可以正常工作，但是 现在我有了在导航控制器子类中设置左右栏按钮项的代码。

但现在在视图控制器上，我没有在该视图控制器上获得导航控制器的 uibar 按钮项。 提前致谢。

【参考方案1】：

试试这个：

显示导航控制器的leftBarButtonItem：

    UIImage *faceImage = [UIImage imageNamed:@"back_arrow.png"];
    UIButton *face = [UIButton buttonWithType:UIButtonTypeCustom];
    face.bounds = CGRectMake( 10, 0, faceImage.size.width, faceImage.size.height );
    [face addTarget:self action:@selector(handleBack:) forControlEvents:UIControlEventTouchUpInside];
    [face setImage:faceImage forState:UIControlStateNormal];
    UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithCustomView:face];
    self.navigationItem.leftBarButtonItem = backButton;
    [self.navigationItem setHidesBackButton:YES animated:YES];
    [self.navigationItem setLeftBarButtonItem:nil animated:NO];
    [self.navigationItem setBackBarButtonItem:nil];

显示导航控制器的rightBarButtonItem：

UIImage *faceImage1= [UIImage imageNamed:@"slideshowarrow"];
UIButton *face1 = [UIButton buttonWithType:UIButtonTypeCustom];
face1.bounds = CGRectMake( 10, 0, faceImage1.size.width, faceImage1.size.height );
[face1 addTarget:self action:@selector(Goto_nextView) forControlEvents:UIControlEventTouchUpInside];
[face1 setImage:faceImage1 forState:UIControlStateNormal];
UIBarButtonItem *backButton1 = [[UIBarButtonItem alloc] initWithCustomView:face1];
self.navigationItem.rightBarButtonItem = backButton1;

【参考方案2】：

设置按钮框架其工作或使用下面的代码左右按钮。它的作品 100%

UIImage* buttonImage = [UIImage imageNamed: @"header.navigation.back.png"]; 
UIButton *aButton = [UIButton buttonWithType:UIButtonTypeCustom];
[aButton setImage:buttonImage forState:UIControlStateNormal];
aButton.frame = CGRectMake(0.0, 0.0, buttonImage.size.width/2, 32);
UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithCustomView:aButton];
[aButton addTarget:self action:@selector(backToPriorView) forControlEvents:UIControlEventTouchUpInside];
self.navigationItem.leftBarButtonItem = backButton;

【讨论】：

我在基于 uinavigationcontoller 的类别类的类别的 viewdidload 中调用了此代码。所以这不会反映在任何视图控制器类上。有可能吗

发布您的屏幕截图

【参考方案3】：

斯威夫特 4.0

let btnBack = UIButton(type: .custom)
btnBack.bounds = CGRect(x: 0, y: 0, width: 44, height: 44)
btnBack.addTarget(self, action: #selector(self.backButtonAction(sender:)), for: .touchUpInside)
btnBack.setImage(#imageLiteral(resourceName: "back_image"), for: .normal)

let leftBarButton = UIBarButtonItem(customView: btnBack)
self.navigationItem.setLeftBarButton(leftBarButton, animated: true)

// 后退按钮动作

@objc func backButtonAction(sender: UIButton) 
    self.navigationController?.popViewController(animated: true)