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，我观察到在我的导航栏中，左侧栏按钮项目的左侧空间和右侧按钮栏的右侧空白区域项目在 iOS 7 中比在 iOS 6 中要多。
我想知道有没有办法可以减少导航栏中左右栏按钮项的空白？？
提前致谢。
【问题讨论】：
标签： ios iphone ios7 uinavigationbar uibarbuttonitem
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
【讨论】：
为我工作
rightBarButton.customView?.transform = CGAffineTransform(translationX: 10, y: 0)
【讨论】：
负空间不适用于 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边距（删除边距后）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]
【讨论】：
我也遇到过这个问题。我也觉得在 iOS 7 中有更多的空间。我发现这大约多出 10 个点。当我想让LeftBarItemButton 从边缘开始时，我通常使用负空格。这对您也很有用。
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];
【讨论】：
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
}
}
【讨论】：
斯威夫特 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)
【讨论】：
斯威夫特 3：
let negativeSpacer:UIBarButtonItem = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.fixedSpace, target: nil, action: nil)
negativeSpacer.width = -10
self.navigationItem.leftBarButtonItems = [negativeSpacer, yourBarButtonItem]
【讨论】：
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，视您的情况而定）
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，应按如下方式键入
captureButton.addTarget(self, action: #selector(YourViewController.showCaptureDetailsForm(_:)), forControlEvents: .TouchUpInside)
【讨论】：
你可以这样做
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 */]
【讨论】：
为了修复这个错误，你必须继承UIButton，这样你就可以覆盖alignmentRectInsets。根据我的测试，您需要返回一个UIEdgeInsets，其右偏移量为正值，左偏移量为正值，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，至少其中一个应该是负数），但实际上是这样的：
- (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。
【讨论】：
不错的决定，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];
【讨论】：
在smek's lead 之后，我创建了一个类别，但对其进行了修改以提供向后兼容性而不是向前兼容性。我在 iOS 7 中设置了一切以按照我想要的方式工作，然后如果用户运行的东西较低，我就开始处理事情。
@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
然后为了在全局范围内获得它，我有一个薄的 UIViewController 子类，我的所有视图控制器都继承自该子类。
@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 中，然后在类别中），我将其留在类别中，以防我想在项目中的任何地方一次性使用它。
【讨论】：
根据@C_X 他的回答，我创建了一个类别，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
在您的视图控制器中，您现在可以使用 [self.navigationItem addLeftBarButtonItem:leftBarButtonItem]; 和 [self.navigationItem addRightBarButtonItem:rightBarButtonItem];
我也尝试子类化 UIButton 并覆盖 -alignmentRectInsets 但这给了我视图之间的转换问题。
【讨论】：
我相信您需要使用带有UIButton 子类的自定义按钮，并在您的子类中覆盖-alignmentRectInsets。我忘记了适当的边缘是否需要正值或负值才能使其正确移动，但如果一个不起作用，请尝试另一个。
【讨论】：