我如何自定义导航返回按钮在iOS 7及以上没有标题?(即只使用箭头)
self.navigationItem.leftBarButtonItem = self.editButtonItem;
我只是想知道它们是否有self。backbuttonitem;
OR
像这样的东西?
self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc]
initWithBarButtonSystemItem:UIBarButtonSystemItemBACK
target:self action:@selector(back)];
当前回答
为你的根视图控制器创建一个带有标题的UILabel，并将它分配给视图控制器的navigationItem.titleView。
现在将标题设置为空字符串，你按下一个视图控制器将有一个没有文本的返回按钮。
self.navigationItem.titleView = titleLabel; //Assuming you've created titleLabel above
self.title = @"";
其他回答
设置返回按钮项目标题为空字符串。
[自我navigationController navigationBar。backItem setTitle: @“”);
在你的第一个ViewController的prepareForSegue:方法中，你设置视图标题为@""，所以当下一个视图被推送时，它将显示前一个ViewController标题为@""。
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{
self.navigationItem.title = @" ";
}
唯一的问题是，当你点击返回按钮时，你之前的视图将没有标题，所以你可以在viewWillAppear上再次添加它:
-(void)viewWillAppear:(BOOL)animated{
self.navigationItem.title = @"First View Title";
}
我不太喜欢这个解决方案，但它是可行的，我没有找到其他方法来做到这一点。
只用一张图片!
OBJ - c:
- (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;
}
斯威夫特4:
let backBTN = UIBarButtonItem(image: UIImage(named: "Back"),
style: .plain,
target: navigationController,
action: #selector(UINavigationController.popViewController(animated:)))
navigationItem.leftBarButtonItem = backBTN
navigationController?.interactivePopGestureRecognizer?.delegate = self
Icon-Back.png
Icon-Back@2x.png
Icon-Back@3x.png
我在viewDidLoad中应用了以下代码，它可以工作:
// 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"]]];
只是更新我使用矢量图标
你不能以你想要的方式访问导航backButtonItem，你需要创建自己的返回按钮，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];
}
当然了:
- (void) popVC{
[self.navigationController popViewControllerAnimated:YES];
}
