Question

我已经创建了一个导航控制器类别并设置了标题，左右边栏按钮在视图中加载了此导航控制器类（此类的类别）。

- (void)viewDidAppear:(BOOL)animated
{

        NSArray *ver = [[UIDevice currentDevice].systemVersion componentsSeparatedByString:@"."];
        if ([[ver objectAtIndex:0] intValue] >= 7) {
            self.navigationBar.barTintColor = [UIColor colorWithRed:229.0f/255.0f green:114.0f/255.0f blue:89.0f/255.0f alpha:1.0f];
            self.navigationBar.translucent = NO;
        }else{
            self.navigationBar.tintColor = [UIColor colorWithRed:229.0f/255.0f green:114.0f/255.0f blue:89.0f/255.0f alpha:1.0f];
        }

        UILabel *lblTitleView=[[UILabel alloc]initWithFrame:CGRectMake(0, 0, 170, 44)];
        [lblTitleView setTextColor:[UIColor whiteColor]];
        [lblTitleView setFont:[UIFont boldSystemFontOfSize:17]];
        [lblTitleView setText:[self SetnavigationTitle:self.navigationItem.title]];
        [lblTitleView setTextAlignment:NSTextAlignmentCenter];
        [lblTitleView setBackgroundColor:[UIColor clearColor]];
        [self.navigationItem setTitleView:lblTitleView];

       // UINavigationController*navCnt = [[UINavigationController alloc] init];

      UIButton *btnLeft=[UIButton buttonWithType:UIButtonTypeCustom];
        [btnLeft setFrame:CGRectMake(0, 5, 32, 32)];
        [btnLeft setImage:[UIImage imageNamed:@"btn_back.png"] forState:UIControlStateNormal];
        [btnLeft setImage:[UIImage imageNamed:@"btn_back.png"] forState:UIControlStateHighlighted];
         [btnLeft setTitle:[NSString stringWithFormat:@"%@",[self SetleftbarbuttonTitle:self.navigationItem.leftBarButtonItem.title]] forState:UIControlStateNormal];
        [btnLeft setTintColor:[UIColor grayColor]];
        [btnLeft setBackgroundColor:[UIColor greenColor]];

        [btnLeft setTag:101];
        [btnLeft addTarget:self action:@selector(btnAction:) forControlEvents:UIControlEventTouchUpInside];
        UIBarButtonItem *leftBarButton=[[UIBarButtonItem alloc]initWithCustomView:btnLeft];
        [self.navigationItem  setLeftBarButtonItem:leftBarButton];
        self.navigationItem.hidesBackButton=YES;


       UIButton *btnRight=[UIButton buttonWithType:UIButtonTypeCustom];
        [btnRight setFrame:CGRectMake(270, 5, 32, 32)];
        [btnRight setImage:[UIImage imageNamed:@"btn_back.png"] forState:UIControlStateNormal];
        [btnRight setImage:[UIImage imageNamed:@"btn_back.png"] forState:UIControlStateHighlighted];
        [btnRight setTitle:[NSString stringWithFormat:@"%@",[self SetRightbarbuttonTitle:self.navigationItem.rightBarButtonItem.title]] forState:UIControlStateNormal];
        [btnRight setTintColor:[UIColor clearColor]];
        [btnRight setBackgroundColor:[UIColor greenColor]];


         [btnRight setTag:102];
        [btnRight addTarget:self action:@selector(btnAction:) forControlEvents:UIControlEventTouchUpInside];
        UIBarButtonItem *rightBarButton=[[UIBarButtonItem alloc]initWithCustomView:btnRight];

        [self.navigationItem setRightBarButtonItem:rightBarButton];

        [super viewDidAppear:animated];


}

当我从任何视图控制器传递标题时，它的工作正常，但每个视图控制器现在我有了在导航控制器子类中设置左右栏按钮项的代码。

但现在在视图控制器上我没有在此视图控制器上获得导航控制器的uibar按钮项。提前谢谢。

Answer 1

试试这个：

显示导航控制器的 leftBarButtonItem ：

    UIImage *faceImage = [UIImage imageNamed:@"back_arrow.png"];
    UIButton *face = [UIButton buttonWithType:UIButtonTypeCustom];
    face.bounds = CGRectMake( 10, 0, faceImage.size.width, faceImage.size.height );
    [face addTarget:self action:@selector(handleBack:) forControlEvents:UIControlEventTouchUpInside];
    [face setImage:faceImage forState:UIControlStateNormal];
    UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithCustomView:face];
    self.navigationItem.leftBarButtonItem = backButton;
    [self.navigationItem setHidesBackButton:YES animated:YES];
    [self.navigationItem setLeftBarButtonItem:nil animated:NO];
    [self.navigationItem setBackBarButtonItem:nil];

显示导航控制器的 rightBarButtonItem ：

UIImage *faceImage1= [UIImage imageNamed:@"slideshowarrow"];
UIButton *face1 = [UIButton buttonWithType:UIButtonTypeCustom];
face1.bounds = CGRectMake( 10, 0, faceImage1.size.width, faceImage1.size.height );
[face1 addTarget:self action:@selector(Goto_nextView) forControlEvents:UIControlEventTouchUpInside];
[face1 setImage:faceImage1 forState:UIControlStateNormal];
UIBarButtonItem *backButton1 = [[UIBarButtonItem alloc] initWithCustomView:face1];
self.navigationItem.rightBarButtonItem = backButton1;

Answer 2

设置按钮框架的工作原理或使用下面的代码左右按钮。它的工作原理是100％

UIImage* buttonImage = [UIImage imageNamed: @"header.navigation.back.png"]; 
UIButton *aButton = [UIButton buttonWithType:UIButtonTypeCustom];
[aButton setImage:buttonImage forState:UIControlStateNormal];
aButton.frame = CGRectMake(0.0, 0.0, buttonImage.size.width/2, 32);
UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithCustomView:aButton];
[aButton addTarget:self action:@selector(backToPriorView) forControlEvents:UIControlEventTouchUpInside];
self.navigationItem.leftBarButtonItem = backButton;

Answer 3

Swift 4.0

let btnBack = UIButton(type: .custom)
btnBack.bounds = CGRect(x: 0, y: 0, width: 44, height: 44)
btnBack.addTarget(self, action: #selector(self.backButtonAction(sender:)), for: .touchUpInside)
btnBack.setImage(#imageLiteral(resourceName: "back_image"), for: .normal)

let leftBarButton = UIBarButtonItem(customView: btnBack)
self.navigationItem.setLeftBarButton(leftBarButton, animated: true)

//后退按钮操作

@objc func backButtonAction(sender: UIButton) {
    self.navigationController?.popViewController(animated: true)
}

在导航控制器类的类别中添加左右栏按钮项

3 个答案: