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
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];
其他回答
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。
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];
// 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];
}
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;
}
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];
}
