在 ios 6/ios 7 兼容应用程序中更改导航返回按钮操作

Question

我有一个导航控制器应用程序，我需要为导航返回栏按钮设置自定义操作。尝试了一些变通方法，但尚未找到解决方案。

试过了

  UIBarButtonItem *backBarItem  = self.navigationItem.leftBarButtonItem;
  backBarItem.target = self;
  backBarItem.action = @selector(popToHomeViewController);

结果：没有效果。后退按钮弹出到导航堆栈中的前一个 viewController

  UIBarButtonItem *customBarItem = [[UIBarButtonItem alloc] initWithTitle:backBarItem.title style:backBarItem.style target:self action:@selector(popViewController)];
  self.navigationItem.leftBarButtonItem = customBarItem;

结果：没有效果。后退按钮弹出到导航堆栈中的前一个 viewController

  UIBarButtonItem *customBarItem = [[UIBarButtonItem alloc] initWithTitle:@"back" style:backBarItem.style target:self action:@selector(popViewController)];
  self.navigationItem.leftBarButtonItem = customBarItem;

结果：现在我的选择器被完美地调用并导航到所需的 viewController。这里的问题是后退按钮不像原生后退按钮。它没有粗体的“

有没有更好的解决方案来确保带有自定义选择器的 ios 6 和 ios 7 兼容导航返回按钮？

Answer 1

试试这个简单的例子会帮助你..

- (void)viewDidLoad {
    [super viewDidLoad];
UIImage *buttonImage = [UIImage imageNamed:@"back.png"];

UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];

[button setImage:buttonImage forState:UIControlStateNormal];


button.frame = CGRectMake(0, 0, buttonImage.size.width, buttonImage.size.height);

 [button addTarget:self action:@selector(back) forControlEvents:UIControlEventTouchUpInside];

UIBarButtonItem *customBarItem = [[UIBarButtonItem alloc] initWithCustomView:button];

self.navigationItem.leftBarButtonItem = customBarItem;
[customBarItem release];
}

-(void)back {

[self.navigationController popViewControllerAnimated:YES];
}

确保在资源文件夹中有一个导航栏后退按钮大小的按钮图像，名称为 back.png

如果需要任何其他帮助，请随时联系。

编码愉快！！！！！！

Answer 2

试试这个

viewController.navigationItem.hidesBackButton = YES;
//set custom image to button if needed
UIImage *backButtonImage = [UIImage imageNamed:@"back"];
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
[button setImage:backButtonImage forState:UIControlStateNormal];
button.frame = CGRectMake(0, 0, backButtonImage.size.width, backButtonImage.size.height);
[button addTarget:viewController action:@selector(back) forControlEvents:UIControlEventTouchUpInside];

UIView *backButtonView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, backButtonImage.size.width, backButtonImage.size.height)];
[backButtonView addSubview:button];

UIBarButtonItem *customBarItem = [[UIBarButtonItem alloc] initWithCustomView:backButtonView];
viewController.navigationItem.leftBarButtonItem = customBarItem;

在back 方法中你可以自定义

- (void)back {
    //Your code
}