[英]How to hide the “back” button in UINavigationController?
你知道如何隱藏UINavigationController中的“后退”按鈕嗎? 另外,如何展示它,但我想這與隱藏它非常相似......
就像郵件應用程序在查看電子郵件時點擊“編輯”一樣在iPhone上執行。
我剛剛找到答案,在控制器中使用這個:
[self.navigationItem setHidesBackButton:YES animated:YES];
並恢復它:
[self.navigationItem setHidesBackButton:NO animated:YES];
-
[UPDATE]
Swift 3.0:
self.navigationItem.setHidesBackButton(true, animated:true)
添加此代碼
[self.navigationItem setHidesBackButton:YES];
除了刪除后退按鈕(使用已推薦的方法)之外,請不要忘記用戶仍然可以在iOS 7及更高版本中使用從左到右的輕掃手勢“彈出”到上一個屏幕。
要禁用它(在適當的時候),請實現以下(例如在viewDidLoad中):
if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7.0)
self.navigationController.interactivePopGestureRecognizer.enabled = NO;
只是為了澄清現有的答案: hidesBackButton
屬性是正確的答案,但在許多答案中並不清楚self
所指的是什么。 基本上你應該在視圖控制器中設置self.navigationItem.hidesBackButton = YES
,它將被推送(或者只是被推送)到UINavigationController
。
換句話說,假設我有一個名為myNavController
的UINavigationController
。 我想在其上添加一個新視圖,當我這樣做時,我不希望后退按鈕再顯示。 我可以這樣做:
UIViewController *newVC = [[UIViewController alloc] init];
//presumably would do some stuff here to set up the new view controller
newVC.navigationItem.hidesBackButton = YES;
[myNavController pushViewController:newVC animated:YES];
代碼完成后,現在應該顯示由newVC
控制的視圖, newVC
不應顯示后退按鈕。
要有條件地隱藏和顯示“后退”按鈕,您可以使用以下代碼:
-(void)viewDidAppear:(BOOL)animated
{
if ([tempAry count]==0)
{
[self.navigationItem setHidesBackButton:YES animated:YES];
}
else
{
[self.navigationItem setHidesBackButton:NO animated:YES];
}
[super viewDidAppear:animated];
}
注意:在某些情況下,您必須將它放在viewDidAppear方法而不是viewWillAppear中,例如:當您將下一個類的數組更新為上一個類,然后將條件檢查到下一個類時,如上所述。
Swift iOS(我用過以下)
// hide back button
self.navigationItem.setHidesBackButton(true, animated: false)
// pgrm mark ----- ------
// hide the back button for this view controller
override func setEditing(editing: Bool, animated: Bool) {
super.setEditing(editing, animated: animated)
self.navigationItem.setHidesBackButton(editing, animated: animated)
}// end setEditing
由於某種原因,sethidesbackbutton不適合我
我用這種方式 - >
self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:[[UIView alloc]initWithFrame:CGRectMake(0, 0, 20, 30)]] ;
始終使用Apple文檔解決簡單問題,它們更直接,更輕便:)
以下是Swift 3.0的語法:
self.navigationItem.setHidesBackButton(true, animated:true)
參考
在我的情況下,我對當前答案幾乎沒有問題:
所以最終對我有用的解決方案是:
- (id)initWithCoder:(NSCoder *)aDecoder {
self = [super initWithCoder:aDecoder];
if (self) {
[self.navigationItem setHidesBackButton:YES animated:NO];
}
return self;
}
Zoran Simic提出的解決方案由於某些原因不適合我。
但是這段代碼確實有效:
MyController* controller = [[MyController alloc] init];
NSArray* array = [[[NSArray alloc] initWithObjects:controller, nil] autorelease];
[self.navigationController setViewControllers:array animated:NO];
[controller release];
顯然,你必須根據自己的喜好操縱NSArray才能讓它適合你。 希望能幫助別人:)
在我的UIViewController子類中,我有這個方法:
-(void)setEditing:(BOOL)editing animated:(BOOL)animated {
[super setEditing:editing animated: animated];
// hide back button in edit mode
[self.navigationItem setHidesBackButton:editing animated:YES];
}
這隱藏了后退按鈕並用Swift中的添加按鈕替換它:
override func setEditing(_ editing: Bool, animated: Bool) {
super.setEditing(editing, animated: animated)
// This hides the back button while in editing mode, which makes room for an add item button
self.navigationItem.setHidesBackButton(editing, animated: animated)
if editing {
// This adds the add item button
let addButton = UIBarButtonItem(barButtonSystemItem: .add, target: self, action: #selector(addTapped))
// Use the animated setter for the left button so that add button fades in while the back button fades out
self.navigationItem.setLeftBarButton(addButton, animated: animated)
self.enableBackGesture(enabled: false)
} else {
// This removes the add item button
self.navigationItem.setLeftBarButton(nil, animated: animated)
self.enableBackGesture(enabled: true)
}
}
func enableBackGesture(enabled: Bool) {
// In addition to removing the back button and adding the add item button while in edit mode, the user can still exit to the previous screen with a left-to-right swipe gesture in iOS 7 and later. This code disables this action while in edit mode.
if let navigationController = self.navigationController {
if let interactivePopGestureRecognizer = navigationController.interactivePopGestureRecognizer {
interactivePopGestureRecognizer.isEnabled = enabled
}
}
}
斯威夫特3。
通常,您應該在本頁面上多次使用Apple的per-ViewController API,但有時您需要立即控制“后退”按鈕。
以下代碼隱藏“后退”按鈕,並確保隱藏按鈕區域中不會發生點擊碰撞檢測。
let emptyView = UIView(frame: .zero)
self.navigationItem.leftBarButtonItem = UIBarButtonItem(customView: emptyView)
這隱藏了后退按鈕
let backBtn = UIBarButtonItem(title: "", style: UIBarButtonItemStyle.plain, target: navigationController, action: nil)
navigationItem.leftBarButtonItem = backBtn
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