将自定义按钮添加到无边框导航控制器答案

【问题标题】：Add custom button to navigation controller without border将自定义按钮添加到无边框导航控制器
【发布时间】：2011-08-03 00:45:24
【问题描述】：

我将自定义按钮添加到导航控制器

UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"back.png"] 样式：UIBarButtonItemStylePlain 目标：自己动作：@selector(backAction)]; self.navigationItem.leftBarButtonItem = backButton;

它工作正常，但按钮出现边框。我该如何解决？

更新我找到了解决方案

UIButton *button = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 25, 25)]; [按钮 setImage:[UIImage imageNamed:@"back.png"] forState:UIControlStateNormal]; [button addTarget:self action:@selector(buttonFavoriteClicked) forControlEvents:UIControlEventTouchUpInside]; UIBarButtonItem *back = [[UIBarButtonItem alloc] initWithCustomView:button]; [按钮释放]；

self.navigationItem.leftBarButtonItem = back;

【问题讨论】：

标签： xcode ios uinavigationcontroller uibarbuttonitem

【解决方案1】：

试试这个。

UIButton *backButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, button_width, button_height)];
[backButton setImage:[UIImage imageNamed:@"back.png"] forState:UIControlStateNormal];
[backButton addTarget:self action:@selector(backAction) forControlEvents:UIControlEventTouchUpInside];
self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:backButton];

【讨论】：

【解决方案2】：

对于 Swift 4

let backButton = UIButton(frame: CGRect(x: 0, y: 0, width: 25, height: 25))
backButton.setImage(UIImage(named: "back.png"), for: .normal)
backButton.addTarget(self, action: #selector(backAction), for: .touchUpInside)
self.navigationItem.rightBarButtonItem = UIBarButtonItem(customView: backButton)

动作（选择器）应该如下所示：

@objc func backAction () {
        // do the magic 
}

【讨论】：

【解决方案3】：

根据需要在左右添加带标题或不带标题的按钮，

func addBarButton(image: UIImage?, isLeft: Bool = true, title: String? = nil, font: UIFont = UIFont.systemFont(ofSize: 16), tintColor: UIColor = R.color.textfieldColor() ?? .black) {
            if let navController = self.navigationController {
                let navBar = navController.navigationBar
                navBar.isHidden = false
                navBar.isTranslucent = false
                let btn = UIButton.init(type: .custom)
                if let img = image {
                    btn.setImage(img, for: UIControl.State.normal)
                }
                if let titleTxt = title {
                    btn.setTitle(titleTxt, for: .normal)
                    btn.setTitleColor(tintColor, for: .normal)
                    btn.titleLabel?.font = font
                }
                btn.frame = CGRect.init(x: 0, y: 0, width: 35, height: 35)
                btn.adjustsImageWhenHighlighted = false
                let barButton = UIBarButtonItem.init(customView: btn)
                if isLeft {
                    btn.addTarget(self, action: #selector(self.btnLeftNavigationClicked), for: UIControl.Event.touchUpInside)
                    btn.tintColor = tintColor
                    if let tabBar = self.tabBarController {
                        tabBar.navigationItem.leftBarButtonItem = nil
                        tabBar.navigationItem.leftBarButtonItem = barButton
                    } else {
                        self.navigationItem.leftBarButtonItem = nil
                        self.navigationItem.leftBarButtonItem = barButton
                    }

                } else {
                    btn.addTarget(self, action: #selector(self.btnRightNavigationClicked), for: UIControl.Event.touchUpInside)
                    btn.tintColor = tintColor
                    if let tabBar = self.tabBarController {
                        tabBar.navigationItem.rightBarButtonItem = barButton
                    } else {
                        self.navigationItem.rightBarButtonItem = barButton
                    }
                }
            }
        }

右键操作

@objc func btnRightNavigationClicked(sender: UIButton) { 
   // add your logic here         
}

左键操作

@objc func btnLeftNavigationClicked(sender: UIButton) {
        guard let navigationController = self.navigationController else {
            return
        }
        navigationController.popViewController(animated: true)
}

【讨论】：