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;

Three20库有一个方法可以做到这一点:

  UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithTitle: @"Title" style:UIBarButtonItemStylePlain 
                                                                target:self action:@selector(foo)];

  UIColor* darkBlue = RGBCOLOR(109, 132, 162);

  TTShapeStyle* style = [TTShapeStyle styleWithShape:[TTRoundedLeftArrowShape shapeWithRadius:4.5] next:
    [TTShadowStyle styleWithColor:RGBCOLOR(255,255,255) blur:1 offset:CGSizeMake(0, 1) next:
    [TTReflectiveFillStyle styleWithColor:darkBlue next:
    [TTBevelBorderStyle styleWithHighlight:[darkBlue shadow]
                                     shadow:[darkBlue multiplyHue:1 saturation:0.5 value:0.5]
                                      width:1 lightSource:270 next:
    [TTInsetStyle styleWithInset:UIEdgeInsetsMake(0, -1, 0, -1) next:
    [TTBevelBorderStyle styleWithHighlight:nil shadow:RGBACOLOR(0,0,0,0.15)
                                        width:1 lightSource:270 next:nil]]]]]];

  TTView* view = [[[TTView alloc] initWithFrame:CGRectMake(0, 0, 80, 35)] autorelease];
  view.backgroundColor = [UIColor clearColor];
  view.style = style;
  backButton.customView = view;


  self.navigationItem.leftBarButtonItem = backButton;

I'm not sure if this would work, but you could try creating a UINavigationController with the default settings to create the button, find the button in the navigation controller's subview hierarchy, call removeFromSuperview on it, destroy the navigation controller, and then add the button as a subview of your toolbar. You may also need to retain and the button before calling removeFromSuperview (and then release it after adding it as subview of your toolbar) to avoid it being deallocated during the process.

试试这个。我相信你不需要一个后退按钮图像来创建这样一个。

UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithTitle:@"Back"
                                                               style:UIBarButtonItemStyleBordered
                                                              target:self
                                                              action:@selector(yourSelectorGoesHere:)];
self.navigationItem.backBarButtonItem = backButton;

这就是你所要做的:)

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];

警告:有报道称这将无法在iOS 6上运行。这可能只适用于较旧版本的操作系统。显然，至少有一名开发者的应用因为使用这种技巧而被拒绝。使用风险自负。使用图像(见上面的答案)可能是一个更安全的解决方案。

这可以在不添加您自己的图像文件使用sekr1t按钮类型101来获得正确的形状。对我来说，窍门是找出我可以使用initWithCustomView来创建BarButtonItem。我个人需要这个动态导航栏而不是工具栏，但我用工具栏测试了它，代码几乎是一样的:

// create button
UIButton* backButton = [UIButton buttonWithType:101]; // left-pointing shape!
[backButton addTarget:self action:@selector(backAction) forControlEvents:UIControlEventTouchUpInside];
[backButton setTitle:@"Back" forState:UIControlStateNormal];

// create button item -- possible because UIButton subclasses UIView!
UIBarButtonItem* backItem = [[UIBarButtonItem alloc] initWithCustomView:backButton];

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

如果您在工具栏上执行此操作，则必须调整设置项的方式，但这取决于您的其余代码，我将其作为读者的练习。这个样例为我工作(编译和运行)。

等等，阅读HIG，不要使用未记录的特性，等等。只有六种支持的按钮类型，这不是其中之一。