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
设置返回按钮项目标题为空字符串。
[自我navigationController navigationBar。backItem setTitle: @“”);
这招对我很管用
[[UIBarButtonItem appearance]
setBackButtonTitlePositionAdjustment:UIOffsetMake(-1000, -1000)
forBarMetrics:UIBarMetricsDefault];
愿一切都好！
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。
我写了一个扩展，使这更容易:
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
}
}
}
}
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!
