Ios UINavigationBar自定义后退按钮，不带标题_Ios_User Interface_Uinavigationbar

Ios UINavigationBar自定义后退按钮，不带标题

ios user-interface

Ios UINavigationBar自定义后退按钮，不带标题,ios,user-interface,uinavigationbar,Ios,User Interface,Uinavigationbar,如何在iOS 7及以上版本中自定义导航返回按钮而不使用标题？（即仅使用箭头）我只是想知道他们是否有自私自利或像这样的 self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemBACK target:self action:@selector(b

如何在iOS 7及以上版本中自定义导航返回按钮而不使用标题？（即仅使用箭头）

我只是想知道他们是否有自私自利

或

像这样的

self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc]
                   initWithBarButtonSystemItem:UIBarButtonSystemItemBACK 
                   target:self action:@selector(back)];

您无法按所需方式访问导航backButtonItem，您需要创建自己的后退按钮，如下所示：

- (void)loadView
{
    [super loadView];
    UIButton *backButton = [[UIButton alloc] initWithFrame: CGRectMake(0, 0, 44.0f, 30.0f)];
    [backButton setImage:[UIImage imageNamed:@"back.png"]  forState:UIControlStateNormal];
    [backButton addTarget:self action:@selector(popVC) forControlEvents:UIControlEventTouchUpInside];
    self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:backButton];
}

当然还有：

- (void) popVC{
  [self.navigationController popViewControllerAnimated:YES];
}

编辑：2014-04-09：当我获得了声誉，我感到很抱歉，因为我不再使用这个把戏了。我推荐凯尔的答案。还请注意，

self.navigationItem.backBarButtonItem的self
不是显示“后退”按钮的视图控制器，而是要返回的上一个视图控制器。

如果您不需要上一个视图控制器的标题文本，只需用空白字符串填充标题即可
self.navigationItem.title = @"";
[self.navigationController pushViewController:viewController animated:YES];

这将防止在推送的视图控制器上显示带有V形标志的“后退”
- (id)initWithCoder:(NSCoder *)aDecoder
{
    self = [super initWithCoder:aDecoder];
    if (self) {
        // Custom initialization
        self.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"" style:UIBarButtonItemStylePlain target:nil action:nil];

    }
    return self; 
}

编辑：即使使用非空标题文本，在视图中设置上一个视图控制器的标题也会出现：
有效，但当视图控制器弹出时标题会闪烁。我认为“推特应用程序”似乎做了更微妙的改动来避免闪烁。
其实很简单，我的做法如下：
目标C
斯威夫特2
斯威夫特3
将此行放入正在推送到堆栈上的视图控制器（上一个视图控制器）。新按下的view controller back按钮现在将显示您为initWithTitle输入的内容，在本例中为空字符串
 来自iOS6的简单破解也适用于iOS7：
[UIBarButtonItem.appearance setBackButtonTitlePositionAdjustment:UIOffsetMake(0, -60) forBarMetrics:UIBarMetricsDefault];

编辑：
不要用这个黑客。有关详细信息，请参阅注释。iOS7有了新的接口规则，因此在推送UIView时，最好至少保留后退箭头。
以编程方式更改“back”文本非常容易。只需在推送视图之前添加此代码（如果您使用的是故事板，则为prepareForSegue）：
这将更改默认的“后退”文本，但将保持iOS7样式的后退箭头。
也可以在推送视图之前更改后退箭头的色调：
- (void)viewDidLoad{
     //NavBar background color:
     self.navigationController.navigationBar.barTintColor=[UIColor redColor];
//NavBar tint color for elements:
     self.navigationController.navigationBar.tintColor=[UIColor whiteColor];
}

希望这对你有帮助
 在第一个ViewController的prepareforsgue:method中，您将视图标题设置为@“”，因此当按下下一个视图时，它将显示上一个ViewController标题，该标题将为@“”
唯一的问题是，当您点击“上一步”按钮时，您的上一个视图将没有标题，因此您可以在“视图”上再次添加它，并显示：
-(void)viewWillAppear:(BOOL)animated{
   self.navigationItem.title = @"First View Title";
}

我不太喜欢这个解决方案，但它很有效，而且我没有找到其他方法来实现它。
我从iOS 5开始就一直在使用这个解决方案，没有任何问题。我在视图控制器中调用了一个实用函数。您需要在viewDidLoad中或之后的任何一点执行此操作
void updateBackButtonTextForViewController(UIViewController *viewController, NSString *text)
{
    if(! viewController.navigationItem.backBarButtonItem)
    {
        viewController.navigationItem.backBarButtonItem =
        [[UIBarButtonItem alloc] initWithTitle:text
                                         style:UIBarButtonItemStylePlain
                                        target:nil action:nil];
    }
    else
    {
        viewController.navigationItem.backBarButtonItem.title = text;
    }
}

在某些情况下，导航项可能已经存在，在其他情况下，需要创建导航项。这可以解释这两种情况，而不会影响导航项标题。它允许您通过简单地传入@“
来删除标题。这是可行的，但它将删除上一个项目的标题，即使您返回到它：
self.navigationController.navigationBar.topItem.title = @"";

只需在推送的视图控制器的viewDidLoad
上设置此属性。
您可以使用此属性。只需添加一个ui按钮
作为UIBarButtonItem
的custumview，这对我来说非常有效
- (id)initWithCoder:(NSCoder *)aDecoder
{
    self = [super initWithCoder:aDecoder];
    if (self) {
        // Custom initialization
        self.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"" style:UIBarButtonItemStylePlain target:nil action:nil];

    }
    return self; 
}

请尝试下面的代码
    self.navigationItem.leftBarButtonItem=[self backButton];


- (UIBarButtonItem *)backButton
{
    UIImage *image = [UIImage imageNamed:@"back-btn.png"];
    CGRect buttonFrame = CGRectMake(0, 0, image.size.width, image.size.height);

    UIButton *button = [[UIButton alloc] initWithFrame:buttonFrame];
    [button addTarget:self action:@selector(backButtonPressed) forControlEvents:UIControlEventTouchUpInside];
    [button setImage:image forState:UIControlStateNormal];

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

    return item;
}

我发现了一个简单的方法，使我的后退按钮与iOS单箭头
让我们假设您有一个从ViewB到ViewA的导航控制器。在IB中，选择ViewA的导航栏，您将看到以下选项：标题、提示和后退按钮
查看导航栏选项

诀窍是在previous视图控制器（视图A）的选项中选择destiny视图控制器后退按钮标题（视图B）。如果您不填写“后退按钮”选项，iOS将自动将标题“后退”，并带有上一个查看控制器的标题。因此，您需要用单个空格填充此选项
在“后退按钮”选项中填充空格

结果：
为根视图控制器创建一个带有所需标题的UILabel
，并将其分配给视图控制器的navigationItem.titleView

现在将标题设置为空字符串，您按下的下一个视图控制器将有一个没有文本的后退按钮
self.navigationItem.titleView = titleLabel; //Assuming you've created titleLabel above
self.title = @"";

我在viewDidLoad中应用了以下代码，它可以正常工作：
  // this will set the back button title
self.navigationController.navigationBar.topItem.title = @"Test";

 // this line set the back button and default icon color  

//[[self.navigationController.navigationBar.subviews lastObject] setTintColor:[UIColor blackColor]];

this line change the back default icon to your custom icon
[[self.navigationController.navigationBar.subviews lastObject] setTintColor:[UIColor colorWithPatternImage:[UIImage imageNamed:@"menuicon"]]];

只是为了更新，我使用矢量图标添加到上面，有时放置单个空格不起作用，您必须不断添加空格

当您在“导航项”下看到“Bar Button Item-”时，您就知道您成功了。这在文档大纲（编辑器->显示文档大纲）中。看到上面的图片后，您可以删除一些空格，看看它是否仍然有效。
目标：
将UINavigationBar
上的所有后退按钮自定义为白色图标
步骤：
1.在AppDelete的“didFinishLaunchingWithOptions”方法中：
UIImage *backBtnIcon = [UIImage imageNamed:@"navBackBtn"];


if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"7.0")) {
    [UINavigationBar appearance].tintColor = [UIColor whiteColor];
    [UINavigationBar appearance].backIndicatorImage = backBtnIcon;
    [UINavigationBar appearance].backIndicatorTransitionMaskImage = backBtnIcon;
}else{

    UIImage *backButtonImage = [backBtnIcon resizableImageWithCapInsets:UIEdgeInsetsMake(0, backBtnIcon.size.width - 1, 0, 0)];
    [[UIBarButtonItem appearance] setBackButtonBackgroundImage:backButtonImage  forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];

    [[UIBarButtonItem appearance] setBackButtonTitlePositionAdjustment:UIOffsetMake(0, -backButtonImage.size.height*2) forBarMetrics:UIBarMetricsDefault];
}

2.在通用超级ViewController
类的viewDidLoad
方法中：
 if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"7.0")) {
        UIBarButtonItem *backItem = [[UIBarButtonItem alloc] initWithTitle:@""
                                                                     style:UIBarButtonItemStylePlain
                                                                    target:nil
                                                                    action:nil];
        [self.navigationItem setBackBarButtonItem:backItem];
    }else{
        //do nothing
    }

虽然完全做到了这一点，但在每个视图控制器中都有这段代码是非常烦人的。我最终得到了一个简单的UINavigationItem
类别。当心，这里有龙！对不起，我的意思是，大口喝：
#import <objc/runtime.h>

@implementation UINavigationItem (ArrowBackButton)

static char kArrowBackButtonKey;

+ (void)load {
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        Method m1 = class_getInstanceMethod(self, @selector(backBarButtonItem));
        Method m2 = class_getInstanceMethod(self, @selector(arrowBackButton_backBarButtonItem));
        method_exchangeImplementations(m1, m2);
    });
}

- (UIBarButtonItem *)arrowBackButton_backBarButtonItem {
    UIBarButtonItem *item = [self arrowBackButton_backBarButtonItem];
    if (item) {
        return item;
    }

    item = objc_getAssociatedObject(self, &kArrowBackButtonKey);
    if (!item) {
        item = [[UIBarButtonItem alloc] initWithTitle:@"" style:UIBarButtonItemStyleBordered target:nil action:NULL];
        objc_setAssociatedObject(self, &kArrowBackButtonKey, item, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
    }
    return item;
}

@end

#导入
@实现UINavigationItem（箭头BackButton）
静态字符kArrowBackButtonKey；
+（空）荷载{
静态调度一次；
一次发送（一次发送）^{
方法m1=类_getInstanceMethod（self，@selector（backBarButtonItem））；
方法m2=class_getInstanceMethod（self，@selector（arrowBackButton_backBarButtonItem））；
方法交换实施（m1，m2）；
});
}
-（UIBARBUTTONIM*）箭头按钮
  // this will set the back button title
self.navigationController.navigationBar.topItem.title = @"Test";

 // this line set the back button and default icon color  

//[[self.navigationController.navigationBar.subviews lastObject] setTintColor:[UIColor blackColor]];

this line change the back default icon to your custom icon
[[self.navigationController.navigationBar.subviews lastObject] setTintColor:[UIColor colorWithPatternImage:[UIImage imageNamed:@"menuicon"]]];

UIImage *backBtnIcon = [UIImage imageNamed:@"navBackBtn"];


if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"7.0")) {
    [UINavigationBar appearance].tintColor = [UIColor whiteColor];
    [UINavigationBar appearance].backIndicatorImage = backBtnIcon;
    [UINavigationBar appearance].backIndicatorTransitionMaskImage = backBtnIcon;
}else{

    UIImage *backButtonImage = [backBtnIcon resizableImageWithCapInsets:UIEdgeInsetsMake(0, backBtnIcon.size.width - 1, 0, 0)];
    [[UIBarButtonItem appearance] setBackButtonBackgroundImage:backButtonImage  forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];

    [[UIBarButtonItem appearance] setBackButtonTitlePositionAdjustment:UIOffsetMake(0, -backButtonImage.size.height*2) forBarMetrics:UIBarMetricsDefault];
}

 if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"7.0")) {
        UIBarButtonItem *backItem = [[UIBarButtonItem alloc] initWithTitle:@""
                                                                     style:UIBarButtonItemStylePlain
                                                                    target:nil
                                                                    action:nil];
        [self.navigationItem setBackBarButtonItem:backItem];
    }else{
        //do nothing
    }

#import <objc/runtime.h>

@implementation UINavigationItem (ArrowBackButton)

static char kArrowBackButtonKey;

+ (void)load {
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        Method m1 = class_getInstanceMethod(self, @selector(backBarButtonItem));
        Method m2 = class_getInstanceMethod(self, @selector(arrowBackButton_backBarButtonItem));
        method_exchangeImplementations(m1, m2);
    });
}

- (UIBarButtonItem *)arrowBackButton_backBarButtonItem {
    UIBarButtonItem *item = [self arrowBackButton_backBarButtonItem];
    if (item) {
        return item;
    }

    item = objc_getAssociatedObject(self, &kArrowBackButtonKey);
    if (!item) {
        item = [[UIBarButtonItem alloc] initWithTitle:@"" style:UIBarButtonItemStyleBordered target:nil action:NULL];
        objc_setAssociatedObject(self, &kArrowBackButtonKey, item, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
    }
    return item;
}

@end

 // add left bar button item

try this code:

- (void)viewDidLoad
{ 
    [super viewDidLoad];

   UIImage* image_back = [UIImage imageNamed:@"your_leftarrowImage.png"];
    CGRect backframe = CGRectMake(250, 9, 15,21);
    UIButton *backbutton = [[UIButton alloc] initWithFrame:backframe];
    [backbutton setBackgroundImage:image_back forState:UIControlStateNormal];
    [backbutton addTarget:self action:@selector(Btn_back:)
         forControlEvents:UIControlEventTouchUpInside];
    [backbutton setShowsTouchWhenHighlighted:YES];
    UIBarButtonItem *backbarbutton =[[UIBarButtonItem alloc] initWithCustomView:backbutton];
    self.navigationItem.leftBarButtonItem=backbarbutton;
    [backbutton release];

}
-(IBAction)Btn_back:(id)sender
{
    [self.navigationController popViewControllerAnimated:YES];

}

@interface Custom_NavigationController : UINavigationController <UINavigationControllerDelegate>

@end

@implementation Custom_NavigationController

- (void)viewDidLoad
{
    [super viewDidLoad];

    self.delegate = self;
}

#pragma mark - UINavigationControllerDelegate

- (void)navigationController:(UINavigationController *)navigationController     willShowViewController:(UIViewController *)viewController animated:(BOOL)animated
{
    viewController.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"" style:UIBarButtonItemStylePlain target:nil action:nil];
}

@end

- (void)viewDidLoad {
     [super viewDidLoad];
     UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"Icon-Back"]
                                                                                        style:UIBarButtonItemStylePlain
                                                                                       target:self.navigationController
                                                                                       action:@selector(popViewControllerAnimated:)];
     self.navigationItem.leftBarButtonItem = backButton;
}

let backBTN = UIBarButtonItem(image: UIImage(named: "Back"), 
                              style: .plain, 
                              target: navigationController, 
                              action: #selector(UINavigationController.popViewController(animated:)))
navigationItem.leftBarButtonItem = backBTN
navigationController?.interactivePopGestureRecognizer?.delegate = self

- (id)initWithCoder:(NSCoder *)aDecoder
{
    self = [super initWithCoder:aDecoder];
    if (self) {
        // Custom initialization
        self.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"" style:UIBarButtonItemStylePlain target:nil action:nil];

    }
    return self; 
}

import UIKit

extension UINavigationItem {
    public override class func initialize() {

    struct Static {
        static var token: dispatch_once_t = 0
    }

    // make sure this isn't a subclass
    if self !== UINavigationItem.self {
        return
    }

    dispatch_once(&Static.token) {
        let originalSelector = Selector("backBarButtonItem")
        let swizzledSelector = #selector(UINavigationItem.noTitleBackBarButtonItem)

        let originalMethod = class_getInstanceMethod(self, originalSelector)
        let swizzledMethod = class_getInstanceMethod(self, swizzledSelector)

        let didAddMethod = class_addMethod(self, originalSelector, method_getImplementation(swizzledMethod), method_getTypeEncoding(swizzledMethod))

        if didAddMethod {
            class_replaceMethod(self, swizzledSelector, method_getImplementation(originalMethod), method_getTypeEncoding(originalMethod))
        } else {
            method_exchangeImplementations(originalMethod, swizzledMethod)
        }
    }
}

// MARK: - Method Swizzling

struct AssociatedKeys {
    static var ArrowBackButtonKey = "noTitleArrowBackButtonKey"
}

func noTitleBackBarButtonItem() -> UIBarButtonItem? {
    if let item = self.noTitleBackBarButtonItem() {
        return item
    }

    if let item = objc_getAssociatedObject(self, &AssociatedKeys.ArrowBackButtonKey) as? UIBarButtonItem {
        return item
    } else {
        let newItem = UIBarButtonItem(title: " ", style: UIBarButtonItemStyle.Plain, target: nil, action: nil)
        objc_setAssociatedObject(self, &AssociatedKeys.ArrowBackButtonKey, newItem as UIBarButtonItem?, .OBJC_ASSOCIATION_RETAIN_NONATOMIC)
        return newItem
    }
}
}

UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithTitle:@""  style:UIBarButtonItemStyleDone target:self action:@selector(handleBack:)];
[backButton setTintColor:Color_WHITE];
[self.navigationItem setBackBarButtonItem:backButton];

 UIImage *backImg = [[UIImage imageNamed:@"ic_back_white"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
[UINavigationBar appearance].backIndicatorImage = backImg;
[UINavigationBar appearance].backIndicatorTransitionMaskImage = backImg;

navigationController?.navigationBar.backItem?.title = ""

navigationController?.navigationBar.topItem?.title = ""

override func viewDidLoad() {
    super.viewDidLoad()
    self.navigationItem.backBarButtonItem = UIBarButtonItem(title: "", style: .Plain, target: nil, action: nil)
}

UINavigationItem *navItem = [[UINavigationItem alloc] init];
   navBar.tintColor = self.tintColor;

   UIImage *myImage = [UIImage imageNamed:@"left_arrow.png"];
     myImage = [myImage              imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate];

     UIBarButtonItem *leftButton = [[UIBarButtonItem alloc] initWithImage:myImage style:UIBarButtonItemStylePlain target:self action:@selector(cancelButtonFunction:)];
     navItem.leftBarButtonItem = leftButton;

    navBar.items = @[ navItem ];

if let topItem = self.navigationController?.navigationBar.topItem {
   topItem.backBarButtonItem = UIBarButtonItem(title: "", style: .plain, target: nil, action: nil)
}

title = " "

extension UIViewController {

    /// Convenience for setting the back button, which will be used on any view controller that this one pushes onto the stack
    @objc var backButtonTitle: String? {
        get {
            return navigationItem.backBarButtonItem?.title
        }
        set {
            if let existingBackBarButtonItem = navigationItem.backBarButtonItem {
                existingBackBarButtonItem.title = newValue
            }
            else {
                let newNavigationItem = UIBarButtonItem(title: newValue, style:.plain, target: nil, action: nil)
                navigationItem.backBarButtonItem = newNavigationItem
            }
        }
    }

}

-(void) viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
    self.title = @"Previous Title";
}

-(void) viewWillDisappear:(BOOL)animated {
    [super viewWillDisappear:animated];
    self.title = @"";
}

self.navigationController?.navigationBar.backIndicatorImage = UIImage(named: "close")
self.navigationController?.navigationBar.backIndicatorTransitionMaskImage = UIImage(named: "close")
self.navigationItem?.backBarButtonItem = UIBarButtonItem(title: "", style: .plain, target: nil, action: nil)

func addCustomizedBackBtn(navigationController: UINavigationController?, navigationItem: UINavigationItem?) {
    navigationController?.navigationBar.backIndicatorImage = UIImage(named: "close")
    navigationController?.navigationBar.backIndicatorTransitionMaskImage = UIImage(named: "close")
    navigationItem?.backBarButtonItem = UIBarButtonItem(title: "", style: .plain, target: nil, action: nil)
}

addCustomizedBackBtn(navigationController: self.navigationController, navigationItem: self.navigationItem)