如何在 UIBarbutton 项目上添加徽章？

Question

嗨，朋友们，我是 iPhone 开发新手。我正在努力在右侧的 UIBarbutton 项目上添加徽章值。我已经尝试过，但无法解决这个问题。谁能帮助我。

提前致谢！

Answer 1

我知道这篇文章已经很老了，但是在 iOS7 中，MKNumberBadgeView 的外观与选项卡栏项目徽章设计并不真正匹配。
我发现这个继承 UIBarButtonItem 并很好地完成工作的另一个组件：

https://github.com/TanguyAladenise/BBBadgeBarButtonItem

希望这可能会帮助像我这样的其他 iOS7 开发者

Answer 2

最后我找到了在 UIBarbutton 项目上添加徽章的方法。我搜索了很多但没有找到正确的答案。所以我创建了 UIButton 并将其添加为 rightbarbutton 项目上的自定义视图。添加 MKNumberBadgeView 用于显示徽章编号。下面我为您添加了我的代码。

// Initialize NKNumberBadgeView...
MKNumberBadgeView *number = [[MKNumberBadgeView alloc] initWithFrame:CGRectMake(60, 00, 30,20)];
number.value = 10;

// Allocate UIButton
UIButton *btn = [UIButton  buttonWithType:UIButtonTypeCustom];
    btn.frame = CGRectMake(0, 0, 70, 30);
    btn.layer.cornerRadius = 8;
    [btn setTitle:@"Button" forState:UIControlStateNormal];
    [btn addTarget:self action:nil forControlEvents:UIControlEventTouchUpInside];
    //[btn setBackgroundColor:[UIColor blueColor]];
    [btn setBackgroundColor:[UIColor colorWithRed:0.0 green:0.0 blue:0.1 alpha:0.2]];
    btn.font = [UIFont systemFontOfSize:13];
    //[btn setFont:[UIFont systemFontOfSize:13]];
    [btn addSubview:number]; //Add NKNumberBadgeView as a subview on UIButton

// Initialize UIBarbuttonitem...
UIBarButtonItem *proe = [[UIBarButtonItem alloc] initWithCustomView:btn];
self.navigationItem.leftBarButtonItem = proe;

谢谢。

Answer 3

phyzalis 有一个很好的答案，这里有他的解决方案的分类版本：

UIBarButtonItem+Badge

下面是如何使用它：

// Build your regular UIBarButtonItem with Custom View
UIImage *image = [UIImage imageNamed:@"someImage"];
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
button.frame = CGRectMake(0,0,image.size.width, image.size.height);
[button addTarget:self action:@selector(buttonPress:) forControlEvents:UIControlEventTouchDown];
[button setBackgroundImage:image forState:UIControlStateNormal];

// Make BarButton Item
UIBarButtonItem *navLeftButton = [[UIBarButtonItem alloc] initWithCustomView:button];
self.navigationItem.leftBarButtonItem = navLeftButton;

// this is the key entry to change the badgeValue
self.navigationItem.leftBarButtonItem.badgeValue = @"1";

Answer 4

我做了与 MaxMa 类似的操作，但我只是继续将徽章直接添加到 self.navigationController.navigationBar 中。

MKNumberBadgeView *numberBadge = [[MKNumberBadgeView alloc] initWithFrame:CGRectMake(35, 0, 40, 40)];
numberBadge.value = 1;

[self.navigationController.navigationBar addSubview:numberBadge];

只需确保在 viewWillDisappear 期间将其从子视图中删除，并在 viewDidAppear 期间将其添加回来。它看起来仍然有点 hacky，但我对这个 hack 比更改导航栏 z 顺序更舒服。

在 viewWillDisappear 期间将其删除

- (void)viewWillDisappear:(BOOL)animated
{
    [super viewWillDisappear:animated];
    [numberBadge removeFromSuperview]; 
}

Answer 5

这很简单，也是最好的方法！

MKNumberBadgeView *numberBadge = [[MKNumberBadgeView alloc] initWithFrame:CGRectMake(230, -51, 40, 40)];
numberBadge.value = 5;

self.navigationController.navigationBar.layer.zPosition = -1;
[self.view addSubview:numberBadge];

Answer 6

针对 Swift 3 进行了更新：

使用下面的简单代码在 UIBarButtonItem 上添加徽章；

// Variable Declartion

var badgeCount = Int()

// Instance Method

    func setUpBadgeCountAndBarButton() {
        // badge label
        let label = UILabel(frame: CGRect(x: 10, y: -05, width: 25, height: 25))
        label.layer.borderColor = UIColor.clear.cgColor
        label.layer.borderWidth = 2
        label.layer.cornerRadius = label.bounds.size.height / 2
        label.textAlignment = .center
        label.layer.masksToBounds = true
        label.textColor = .white
        label.font = label.font.withSize(12)
        label.backgroundColor = .red
        label.text = "\(self.badgeCount)"

        // button
        let rightButton = UIButton(frame: CGRect(x: 0, y: 0, width: 35, height: 35))
        rightButton.setBackgroundImage(UIImage(named: "notification_dash"), for: .normal)
        rightButton.addTarget(self, action: #selector(notificationBarButtonClick), for: .touchUpInside)
        rightButton.addSubview(label)

        // Bar button item
        let rightBarButtomItem = UIBarButtonItem(customView: rightButton)
        navigationItem.rightBarButtonItem = rightBarButtomItem
    }

// Call To Method

self.badgeCount = 11
self.setUpBadgeCountAndBarButton()

//注意：根据您收到的通知增加您的徽章。您必须根据您决定的逻辑编写代码，即如何在数据库中维护该徽章计数。

享受..！

Answer 7

我知道这个问题已经解决了，但为了完整起见，我想我可以将我发现的内容添加到这个答案中。

您还可以直接将 MKNumberBadgeView 添加到 UIBarButtonItem 的视图中。使用 Monotouch (C#)，这就是获取 UIBarButtonItem 视图的方法，

        //barbutton is some UIBarButtonItem. Make sure to check for view. In
        //ViewDidLoad(), the view for the barbutton might not exist yet.
        Selector sel = new Selector("view");
        var handle = Messaging.intptr_objc_msgSend(barbutton.Handle, sel.Handle);
        var view = Runtime.GetNSObject(handle) as UIView;
        var mkBadge = ...    //the badge
        view.Add(badge);
        view.Layer.ZPosition = <some large number> 

我确信将其转换为 Obj-C 很容易。您还需要调整徽章的框架，使其显示在正确的位置。

这样您就不必从导航栏中删除/添加视图。

Answer 8

在搜索了太多解决方案后，我找到了 Objective-C 的最佳解决方案

转到以下链接并下载两个文件 "UIBarButtonItem+Badge.h" 和 "UIBarButtonItem+Badge.m"并添加到您的项目中：

https://github.com/mikeMTOL/UIBarButtonItem-Badge

然后在你的类中导入：

#import "UIBarButtonItem+Badge.h"

并写下以下行来添加徽章：

self.navigationItem.rightBarButtonItem.badgeValue = @"1"; //your value 

希望它能工作！

Answer 9

这是一个简单的 Swift 4 解决方案（带有一些自定义） https://github.com/Syngmaster/BadgedBarButtonItem< /a>

只需将类拖放到您的项目中，您就可以像这样使用它：

class ViewController: UIViewController {

    let btn = BadgedButtonItem(with: UIImage(named: "your_image"))

    override func viewDidLoad() {
        super.viewDidLoad()

        btn.badgeTextColor = .black
        btn.badgeTintColor = .yellow
        btn.position = .right
        btn.hasBorder = true
        btn.borderColor = .red
        btn.badgeSize = .medium
        btn.badgeAnimation = true

        self.navigationItem.rightBarButtonItem = btn

        btn.tapAction = {
            self.btn.setBadge(with: 4)
        }

    }

}

Answer 10

添加 UIActivityIndi​​catorView 而不替换 UIBarButtonItem 的扩展。

extension UIBarButtonItem {
    
    func startLoading() {
        guard let view = self.value(forKey: "view") as? UIView else { return }
        let loading = UIActivityIndicatorView(activityIndicatorStyle: .gray)
        loading.frame = view.bounds
        loading.startAnimating()
        view.addSubview(loading)
        view.bringSubview(toFront: loading)
        let buttonView = view.subviews.first
        buttonView?.alpha = 0.1
    }
    
    func stopLoading() {
        guard let view = self.value(forKey: "view") as? UIView else { return }
        let loading = view.subviews.filter({ $0 is UIActivityIndicatorView }).first
        loading?.removeFromSuperview()
        let buttonView = view.subviews.first
        buttonView?.alpha = 1.0
    }
    
}