如何在UINavigationBar中编辑左，右UIBarButtonItem的空格[iOS 7]

Question

我之前使用的是iOS 6.1，但现在我已经转移到iOS 7.除了其他问题之外，我观察到在我的导航栏中，左侧栏按钮项的左侧空间和右侧按钮栏项的右侧空白区域相当IOS 7比iOS 6更多。

我需要知道有没有办法可以减少导航栏中左，右栏按钮项的空格？

提前致谢。

Answer 1

我也遇到了这个问题。我也有感觉在iOS 7中有更多的空间。而且我发现这大约多了10分。当我想让LeftBarItemButton从边缘开始时，我通常使用负空格。这对你也很有用。

UIBarButtonItem *negativeSpacer = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil];

negativeSpacer.width = -16; // it was -6 in iOS 6

[self.navigationItem setLeftBarButtonItems:@[negativeSpacer, requiredButton]; /* this will be the button which you actually need */] animated:NO];

Answer 2

Swift 3.1

给左栏按钮项目负空间：

    let backButton = UIButton.init(type: .custom)
    backButton.frame = CGRect.init(x: 0, y: 0, width: 40, height: 40)
    // negative space
    backButton.contentEdgeInsets = UIEdgeInsets(top: 0, left: -44.0, bottom: 0, right: 0)
    backButton.setImage(Ionicons.iosArrowBack.image(30, color: UIColor(hex: 0xFD6250)), for: .normal)
    backButton.addTarget(self, action: #selector(InviteVC.goBack), for: .touchUpInside)   
    // set back button
    self.navigationItem.leftBarButtonIteUIBarButtonItem.init(customView: backButton) 

---

Answer 3

负面空间不适用于iOS 11

override func viewWillLayoutSubviews() {
    super.viewWillLayoutSubviews()
    // to remove navigation bar extra margin
    for view in (self.navigationController?.navigationBar.subviews)! {
        view.layoutMargins = UIEdgeInsets.zero
    }
}

上面的代码将从leftBarButtonItem和RightBarButtonItem两侧删除边距。如果您需要添加额外的保证金（删除保证金后），请添加以下代码

    let rightButton = UIButton(frame: CGRect(x: 0, y: 0, width: 17, height: 20))
    rightButton.setImage(UIImage(named: "ic_cart"), for: .normal)

    let rightBarButtomItem = UIBarButtonItem(customView: rightButton)

    let spacer = UIBarButtonItem(barButtonSystemItem: UIBarButtonItem.SystemItem.fixedSpace, target: nil, action: nil)
    spacer.width = 28 //This will add extra margin on right side
    navigationItem.rightBarButtonItems = [spacer,rightBarButtomItem]

Answer 4

我相信您需要使用带有UIButton子类的自定义按钮，并在您的子类中重写-alignmentRectInsets。我忘了你是否需要正确值或负值才能让它正确移动，但如果一个不起作用，请尝试另一个。

Answer 5

为我工作

rightBarButton.customView？.transform = CGAffineTransform（translationX：10，y：0）

Answer 6

很好的决定，非常感谢！我只需要在导航标题的左侧添加两个元素。这是我的解决方案：

  // Settings Button
  // This trick correct spacing between two left buttons
  UIBarButtonItem *settingsButtonItem = [[UIBarButtonItem alloc] init];
  UIView *settingsButtonItemView = [[UIView alloc] initWithFrame:CGRectMake(0.0, 0.0, 22.0, 22.0)];
  settingsButtonItem.customView = settingsButtonItemView;
  UIButton *settingsButton = [UIButton buttonWithType:UIButtonTypeSystem];
  settingsButton.frame = settingsButtonItemView.frame;
  [settingsButton setImage:[UIImage imageNamed:@"settings"] forState:UIControlStateNormal];
  settingsButton.tintColor = [[[[UIApplication sharedApplication] delegate] window] tintColor];
  [settingsButton addTarget:self action:@selector(showSettings:) forControlEvents:UIControlEventTouchDown];
  [settingsButtonItemView addSubview:settingsButton];

  // Star Button
  UIBarButtonItem *starButtonItem = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"star_gray"] style:UIBarButtonItemStyleBordered target:self action:@selector(showStarred)];
  starButtonItem.width = 22.0;
  NSLog(@"%f", starButtonItem.width);

  // Negative Spacer
  // It shifts star button to the left
  UIBarButtonItem *negativeSpacer = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil];
  negativeSpacer.width = -10.0;

  NSArray *leftNavigtaionBarButtonItems = @[negativeSpacer, starButtonItem, settingsButtonItem];
  [self.navigationItem setLeftBarButtonItems:leftNavigtaionBarButtonItems];

Answer 7

基于@C_X他的回答我创建了一个类别，它根据当前设备的iOS版本添加和定位UIBarButtonItem。

// UINavigationItem+Additions.h
@interface UINavigationItem (Additions)
- (void)addLeftBarButtonItem:(UIBarButtonItem *)leftBarButtonItem;
- (void)addRightBarButtonItem:(UIBarButtonItem *)rightBarButtonItem;
@end

// UINavigationItem+Additions.m
@implementation UINavigationItem (Additions)

- (void)addLeftBarButtonItem:(UIBarButtonItem *)leftBarButtonItem
{
    if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7.0) {
        // Add a negative spacer on iOS >= 7.0
        UIBarButtonItem *negativeSpacer = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace
                              target:nil action:nil];
        negativeSpacer.width = -10;
        [self setLeftBarButtonItems:[NSArray arrayWithObjects:negativeSpacer, leftBarButtonItem, nil]];
    } else {
        // Just set the UIBarButtonItem as you would normally
        [self setLeftBarButtonItem:leftBarButtonItem];
    }
}

- (void)addRightBarButtonItem:(UIBarButtonItem *)rightBarButtonItem
{
    if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7.0) {
        // Add a negative spacer on iOS >= 7.0
        UIBarButtonItem *negativeSpacer = [[UIBarButtonItem alloc]
                                       initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace
                                       target:nil action:nil];
        negativeSpacer.width = -10;
        [self setRightBarButtonItems:[NSArray arrayWithObjects:negativeSpacer, rightBarButtonItem, nil]];
    } else {
        // Just set the UIBarButtonItem as you would normally
        [self setRightBarButtonItem:rightBarButtonItem];
    }
}

@end

在视图控制器中，您现在可以使用[self.navigationItem addLeftBarButtonItem:leftBarButtonItem];和[self.navigationItem addRightBarButtonItem:rightBarButtonItem];

我也尝试了子类化UIButton并覆盖-alignmentRectInsets，但这给了我视图之间转换的问题。

Answer 8

对于Swift 2.0，这是我获得以下效果的解决方案......

（实际值可能会有所不同，具体取决于您的具体情况）

let captureButton = UIButton()
captureButton.setTitle("CAPTURE DETAILS", forState: .Normal)
captureButton.frame = CGRectMake(0, 0, 200, 95)
captureButton.addTarget(self, action: Selector("showCaptureDetailsForm:"), forControlEvents: .TouchUpInside) // *** See update below for Swift 2.2 syntax
captureButton.setBackgroundImage(UIImage(named: "blueTopRight"), forState: .Normal)

let rightBarButton = UIBarButtonItem()
rightBarButton.customView = captureButton        

let negativeSpacer = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.FixedSpace, target: nil, action: nil)
negativeSpacer.width = -25;

self.navigationItem.setRightBarButtonItems([negativeSpacer, rightBarButton ], animated: false)

Swift 2.2更新：

对于Swift 2.2，action: Selector方法已更改，应按以下方式键入

captureButton.addTarget(self, action: #selector(YourViewController.showCaptureDetailsForm(_:)), forControlEvents: .TouchUpInside)

Answer 9

为了修复这个bug，你必须继承UIButton，以便你可以覆盖alignmentRectInsets。根据我的测试，你需要返回一个带有正向右偏移或正向左偏移的UIEdgeInsets，具体取决于按钮位置。这些数字对我来说毫无意义（根据常识，其中至少有一个应该是否定的），但这实际上是有效的：

- (UIEdgeInsets)alignmentRectInsets {
    UIEdgeInsets insets;
    if (IF_ITS_A_LEFT_BUTTON) {
        insets = UIEdgeInsetsMake(0, 9.0f, 0, 0);
    } 
    else { // IF_ITS_A_RIGHT_BUTTON
        insets = UIEdgeInsetsMake(0, 0, 0, 9.0f);
    }
    return insets;
}

特别感谢@zev建议我尝试调整alignmentRectInsets。

Answer 10

在smek's lead之后，我做了一个类别，但修改它以提供向后兼容性而不是向前。我在iOS 7中设置了我想要的一切，然后如果用户运行的东西更低，我开始捣乱。

@interface UINavigationItem (BarButtonItemSpacingSupport)

- (void)addLeftBarButtonItem:(UIBarButtonItem *)leftBarButtonItem;
- (void)addRightBarButtonItem:(UIBarButtonItem *)rightBarButtonItem;

@end

@implementation UINavigationItem (BarButtonItemSpacingSupport)

- (void)addLeftBarButtonItem:(UIBarButtonItem *)leftBarButtonItem
{
    if (SYSTEM_VERSION_LESS_THAN(@"7.0")) {
        // Add a spacer on when running lower than iOS 7.0
        UIBarButtonItem *negativeSpacer = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace
                                                                                        target:nil action:nil];
        negativeSpacer.width = 10;
        [self setLeftBarButtonItems:[NSArray arrayWithObjects:negativeSpacer, leftBarButtonItem, nil]];
    } else {
        // Just set the UIBarButtonItem as you would normally
        [self setLeftBarButtonItem:leftBarButtonItem];
    }
}

- (void)addRightBarButtonItem:(UIBarButtonItem *)rightBarButtonItem
{
    if (SYSTEM_VERSION_LESS_THAN(@"7.0")) {
        // Add a spacer on when running lower than iOS 7.0
        UIBarButtonItem *negativeSpacer = [[UIBarButtonItem alloc]
                                           initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace
                                           target:nil action:nil];
        negativeSpacer.width = 10;
        [self setRightBarButtonItems:[NSArray arrayWithObjects:negativeSpacer, rightBarButtonItem, nil]];
    } else {
        // Just set the UIBarButtonItem as you would normally
        [self setRightBarButtonItem:rightBarButtonItem];
    }
}

@end

然后为了全局化，我有一个瘦的UIViewController子类，我的所有视图控制器都继承了它。

@interface INFViewController : UIViewController

@end

@implementation INFViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    if (SYSTEM_VERSION_LESS_THAN(@"7.0")) {
        [self setupNavBarForPreIOS7Support];
    }
}

- (void)setupNavBarForPreIOS7Support {
    if (self.navigationController) {
        UINavigationItem *navigationItem = self.navigationItem;
        UIBarButtonItem *leftItem = navigationItem.leftBarButtonItem;
        UIBarButtonItem *rightItem = navigationItem.rightBarButtonItem;

        if (leftItem) {
            [navigationItem addLeftBarButtonItem:leftItem];
        }

        if (rightItem) {
            [navigationItem addRightBarButtonItem:rightItem];
        }
    }
}

@end

我意识到我正在检查操作系统版本两次（一次在INFViewController并再次在类别中），我把它留在类别中，我想在项目的任何地方使用它作为一次性。

Answer 11

对于swift你可以做到这一点

var negativeSpace:UIBarButtonItem = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.FixedSpace, target: nil, action: nil)
negativeSpace.width = -17.0
self.navigationItem.rightBarButtonItems = [negativeSpace, requiredButton /* this will be the button which you actually need */]

Answer 12

这是我对Swift 3.0的解决方案：

rightBtn.imageInsets = UIEdgeInsets(top: 0, left: -13.0, bottom: 0, right: 13.0) self.navigationItem.rightBarButtonItem = rightBtn

Answer 13

斯威夫特3：

let negativeSpacer:UIBarButtonItem = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.fixedSpace, target: nil, action: nil)
        negativeSpacer.width = -10
self.navigationItem.leftBarButtonItems = [negativeSpacer, yourBarButtonItem]

Answer 14

As of iOS 11 wont accept negative space width, in order to align the bar button items to the margin, I have used the below code.

 override func viewWillLayoutSubviews() {
                super.viewWillLayoutSubviews()
                for view in (self.navigationController?.navigationBar.subviews)! {
                    view.layoutMargins = UIEdgeInsets.zero
                }
            }