斯威夫特

// create button
    var backButton = UIButton(type: 101)

    // left-pointing shape!
    backButton.addTarget(self, action: #selector(self.backAction), for: .touchUpInside)
    backButton.setTitle("Back", for: .normal)

    // create button item -- possible because UIButton subclasses UIView!
    var backItem = UIBarButtonItem(customView: backButton)

    // add to toolbar, or to a navbar (you should only have one of these!)
    toolbar.items = [backItem]
    navItem.leftBarButtonItem = backItem

以下是我在搜索了所有这些解决方案和其他解决方案后最终所做的事情。它使用了一个可拉伸的png的提取UIKit库存图像。通过这种方式，您可以将文本设置为您喜欢的任何内容

// Generate the background images
UIImage *stretchableBackButton = [[UIImage imageNamed:@"UINavigationBarDefaultBack.png"] stretchableImageWithLeftCapWidth:14 topCapHeight:0];
UIImage *stretchableBackButtonPressed = [[UIImage imageNamed:@"UINavigationBarDefaultBackPressed.png"] stretchableImageWithLeftCapWidth:13 topCapHeight:0];
// Setup the UIButton
UIButton *backButton = [UIButton buttonWithType:UIButtonTypeCustom];
[backButton setBackgroundImage:stretchableBackButton forState:UIControlStateNormal];
[backButton setBackgroundImage:stretchableBackButtonPressed forState:UIControlStateSelected];
NSString *buttonTitle = NSLocalizedString(@"Back", @"Back");
[backButton setTitle:buttonTitle forState:UIControlStateNormal];
[backButton setTitle:buttonTitle forState:UIControlStateSelected];
backButton.titleEdgeInsets = UIEdgeInsetsMake(0, 5, 2, 1); // Tweak the text position
NSInteger width = ([backButton.titleLabel.text sizeWithFont:backButton.titleLabel.font].width + backButton.titleEdgeInsets.right +backButton.titleEdgeInsets.left);
[backButton setFrame:CGRectMake(0, 0, width, 29)];
backButton.titleLabel.font = [UIFont boldSystemFontOfSize:13.0f];
[backButton addTarget:self action:@selector(yourSelector:) forControlEvents:UIControlEventTouchDown];
// Now add the button as a custom UIBarButtonItem
UIBarButtonItem *backButtonItem = [[[UIBarButtonItem alloc] initWithCustomView:backButton] autorelease];
self.navigationItem.leftBarButtonItem = backButtonItem;

我使用了以下从http://www.teehanlax.com/blog/?p=447派生的psd

http://www.chrisandtennille.com/pictures/backbutton.psd

然后我只是创建了一个自定义的UIView，我在工具栏项的customView属性中使用。

很适合我。

编辑:正如prariehippo所指出的，maralbjo发现使用以下，简单的代码做到了这一点(需要自定义图像在捆绑)应该与这个答案相结合。这里是额外的代码:

// Creates a back button instead of default behaviour (displaying title of previous screen)
UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"back_arrow.png"]
                                                               style:UIBarButtonItemStyleBordered
                                                              target:self
                                                              action:@selector(backAction)];

tipsDetailViewController.navigationItem.leftBarButtonItem = backButton;
[backButton release];

Swift 5.2 Xcode 11.4

苹果标志雪佛龙。左边现在允许一个更优雅的解决方案，使一个自定义按钮。我已经尽可能地匹配了大小和间距。

import UIKit

class CustomBackButton: UIBarButtonItem {

    convenience init(target: Any, selector: Selector) {

        // Create UIButton
        let button = UIButton(frame: .zero)

        // Customise Title
        button.setTitle("Back", for: .normal)
        button.setTitleColor(.systemBlue, for: .normal)
        button.titleLabel?.font = UIFont.systemFont(ofSize: 17)

        // Customise Image
        let config = UIImage.SymbolConfiguration(pointSize: 19.0, weight: .semibold, scale: .large)
        let image = UIImage(systemName: "chevron.left", withConfiguration: config)
        button.setImage(image, for: .normal)

        // Add Target
        button.addTarget(target, action: selector, for: .touchUpInside)

        // Customise Spacing to match system Back button
        button.imageEdgeInsets = UIEdgeInsets(top: 0.0, left: -18.0, bottom: 0.0, right: 0.0)
        button.titleEdgeInsets = UIEdgeInsets(top: 0.0, left: -12.0, bottom: 0.0, right: 0.0)

        self.init(customView: button)
    }
}

这可以实现为一个UIToolbarItem，或UINavigationItem

override func viewDidLoad() {
    super.viewDidLoad()

    // UIToolbar Item
    let barBackButton = CustomBackButton(target: self, selector: #selector(backButtonTapped))
    let flexSpace = UIBarButtonItem(barButtonSystemItem: .flexibleSpace, target: nil, action: nil)
    navigationController?.setToolbarHidden(false, animated: false)
    toolbarItems = [barBackButton, flexSpace]

    // Navigation Item
    let navBackButton = CustomBackButton(target: self, selector: #selector(backButtonTapped))
    navigationItem.leftBarButtonItem = navBackButton
}

@objc func backButtonTapped() {
    print("Back tapped")
}

如果你想翻转按钮，让箭头指向右侧:

使用命名为“chevron.right”的苹果符号

将以下代码添加到CustomBackButton类:

    // Put the image of the right side of the button
    button.transform = CGAffineTransform(scaleX: -1.0, y: 1.0)
    button.titleLabel?.transform = CGAffineTransform(scaleX: -1.0, y: 1.0)
    button.imageView?.transform = CGAffineTransform(scaleX: -1.0, y: 1.0)

我试图做同样的事情，但我希望后退按钮在导航栏。(我实际上需要一个返回按钮，这将做的不仅仅是返回，所以我必须使用leftBarButtonItem属性)。我尝试了AndrewS建议的，但在导航栏中，它不会看起来像它应该的样子，因为UIButton有点被强制转换为UIBarButtonItem。

但我找到了一个解决办法。我只是在UIButton下面放了一个UIView并为UIBarButtonItem设置了customView。下面是代码，如果有人需要的话:

// initialize button and button view
UIButton *backButton = [UIButton buttonWithType:101];
UIView *backButtonView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, backButton.frame.size.width, backButton.frame.size.height)];

[backButton addTarget:self action:@selector(backButtonTouched:) forControlEvents:UIControlEventTouchUpInside];
[backButton setTitle:@"Back" forState:UIControlStateNormal];
[backButtonView addSubview:backButton];

// set buttonview as custom view for bar button item
UIBarButtonItem *backButtonItem = [[UIBarButtonItem alloc] initWithCustomView:backButtonView];
self.navigationItem.leftBarButtonItem = backButtonItem;

// push item to navigationbar items
[self.navigationController.navigationBar setItems:[NSArray arrayWithObject:backButtonItem]];

我发现使用以下，简单的代码做到了这一点(需要在bundle中自定义图像):

// Creates a back button instead of default behaviour (displaying title of previous screen)
    UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"back_arrow.png"]
                                                                   style:UIBarButtonItemStyleBordered
                                                                  target:self
                                                                  action:@selector(backAction)];

    tipsDetailViewController.navigationItem.leftBarButtonItem = backButton;
    [backButton release];