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
你可以用这个。这对我来说是完美的，只是添加一个UIButton作为UIBarButtonItem的定制视图。
试试下面的代码
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;
}
其他回答
iOS7有新的界面规则，所以当你推送一个UIView时，最好至少保留后退箭头。 通过编程方式更改“返回”文本非常容易。只需要在推送视图之前添加这段代码(如果你使用的是StoryBoards，可以使用prepareForSegue):
-(void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{
self.navigationItem.backBarButtonItem=[[UIBarButtonItem alloc] initWithTitle:@"NEW TITLE" style:UIBarButtonItemStylePlain target:nil action:nil];
}
这将改变默认的“后退”文本，但将保持iOS7风格的后退箭头。 你也可以在推送视图之前改变后退箭头的颜色:
- (void)viewDidLoad{
//NavBar background color:
self.navigationController.navigationBar.barTintColor=[UIColor redColor];
//NavBar tint color for elements:
self.navigationController.navigationBar.tintColor=[UIColor whiteColor];
}
希望这对你有所帮助!
iOS6的简单破解也适用于iOS7:
[UIBarButtonItem.appearance setBackButtonTitlePositionAdjustment:UIOffsetMake(0, -60) forBarMetrics:UIBarMetricsDefault];
编辑: 不要使用这种方法。详情见评论。
// 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];
}
这在iOS6和ios7上都很有效
Xamarin (c#)选项
var buttonStyleItems = UIBarButtonItem.AppearanceWhenContainedIn(typeof(SettingsNavigationController));
buttonStyleItems.SetBackButtonTitlePositionAdjustment(new UIOffset(-1000, -1000), UIBarMetrics.Default);
objective - c选项
[[UIBarButtonItem外观]setBackButtonTitlePositionAdjustment:UIOffsetMake(-1000， -1000) forBarMetrics:UIBarMetricsDefault];
如果你有两个ViewController(FirstVC, seconddvc)嵌入在导航控制器中，你想在seconddvc中只有后退箭头。
你可以试试这个 在FirstVC的ViewDidLoad中
override func viewDidLoad() {
super.viewDidLoad()
self.navigationItem.backBarButtonItem = UIBarButtonItem(title: "", style: .Plain, target: nil, action: nil)
}
然后当你推到seconddvc，你会看到只有后退箭头
