我该怎样改变UINavigationBar中UIBarButtonItem的位置?我想让我的按钮比它正常位置高大约5像素。
我该怎样改变UINavigationBar中UIBarButtonItem的位置?我想让我的按钮比它正常位置高大约5像素。
这段代码可以创建一个带有图像背景和自定义位置的UINavigationBar的后退按钮。诀窍是创建一个中间视图并修改其边界。
Swift 5
let menuBtn = UIButton(type: .custom)
let backBtnImage = UIImage(named: "menu")
menuBtn.setBackgroundImage(backBtnImage, for: .normal)
menuBtn.addTarget(self, action: #selector(showMenuTapped), for: .touchUpInside)
menuBtn.frame = CGRect(x: 0, y: 0, width: 45, height: 45)
let view = UIView(frame: CGRect(x: 0, y: 0, width: 45, height: 45))
view.bounds = view.bounds.offsetBy(dx: 10, dy: 3)
view.addSubview(menuBtn)
let backButton = UIBarButtonItem(customView: view)
navigationItem.leftBarButtonItem = backButton
Objective C
UIButton *backBtn = [UIButton buttonWithType:UIButtonTypeCustom];
UIImage *backBtnImage = [UIImage imageNamed:@"btn-back"];
UIImage *backBtnImagePressed = [UIImage imageNamed:@"btn-back-pressed"];
[backBtn setBackgroundImage:backBtnImage forState:UIControlStateNormal];
[backBtn setBackgroundImage:backBtnImagePressed forState:UIControlStateHighlighted];
[backBtn addTarget:self action:@selector(goBack) forControlEvents:UIControlEventTouchUpInside];
backBtn.frame = CGRectMake(0, 0, 63, 33);
UIView *backButtonView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 63, 33)];
backButtonView.bounds = CGRectOffset(backButtonView.bounds, -14, -7);
[backButtonView addSubview:backBtn];
UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithCustomView:backButtonView];
self.navigationItem.leftBarButtonItem = backButton;
CGRectOffset
设置UIButton
的偏移量无效。在iOS7中,UIBarButtonItem
似乎有固定的位置,移动/偏移UIButton
的x,y坐标无效。修改UIButton
的宽度和高度有效,但更改x,y坐标则没有影响。 - Saurabh HoodaUIBarButtonItem
位置的解决方案。它只会增加复杂性并引起其他问题,如点击区域。我认为这个问题应该在苹果的问题报告页面上作为一个功能或错误来公开讨论,因为很多开发者都希望改变这些坐标或对按钮有更多的控制。 - Roland我使用 transform 和自定义视图解决了问题:
(Swift)
// create the button
let suggestImage = UIImage(named: "tab-item-popcorn-on")!.imageWithRenderingMode(.AlwaysOriginal)
let suggestButton = UIButton(frame: CGRectMake(0, 0, 40, 40))
suggestButton.setBackgroundImage(suggestImage, forState: .Normal)
suggestButton.addTarget(self, action: Selector("suggesMovie:"), forControlEvents:.TouchUpInside)
// here where the magic happens, you can shift it where you like
suggestButton.transform = CGAffineTransformMakeTranslation(10, 0)
// add the button to a container, otherwise the transform will be ignored
let suggestButtonContainer = UIView(frame: suggestButton.frame)
suggestButtonContainer.addSubview(suggestButton)
let suggestButtonItem = UIBarButtonItem(customView: suggestButtonContainer)
// add button shift to the side
navigationItem.rightBarButtonItem = suggestButtonItem
没有特别好的方法来完成这个任务。如果你真的必须这样做,最好的方法是创建一个子类继承自UINavigationBar,并重写layoutSubviews
方法,在调用[super layoutSubviews]
后寻找并重新定位按钮的视图。
[[UIBarButtonItem appearanceWhenContainedIn:[UINavigationBar class], nil] setBackButtonBackgroundVerticalPositionAdjustment:-3 forBarMetrics:UIBarMetricsDefault];
- barndog对于那些正在开发适用于iOS 5的应用程序并且看到这篇文章而感到沮丧的人们...尝试像这样做:
float my_offset_plus_or_minus = 3.0f;
UIBarButtonItem * item = [[UIBarButtonItem alloc] initWithTitle:@"title"
style:UIBarButtonItemStyleDone
target:someObject action:@selector(someMessage)];
[item setBackgroundVerticalPositionAdjustment:my_offset_plus_or_minus forBarMetrics:UIBarMetricsDefault];
最好的方法是按照此处所述来为您的UINavigationBar创建子类:https://dev59.com/-ljUa4cB1Zd3GeqPVd8z#17434530
这是我的示例:
#define NAVIGATION_BTN_MARGIN 5
@implementation NewNavigationBar
- (void)layoutSubviews {
[super layoutSubviews];
UINavigationItem *navigationItem = [self topItem];
UIView *subview = [[navigationItem rightBarButtonItem] customView];
if (subview) {
CGRect subviewFrame = subview.frame;
subviewFrame.origin.x = self.frame.size.width - subview.frame.size.width - NAVIGATION_BTN_MARGIN;
subviewFrame.origin.y = (self.frame.size.height - subview.frame.size.height) / 2;
[subview setFrame:subviewFrame];
}
subview = [[navigationItem leftBarButtonItem] customView];
if (subview) {
CGRect subviewFrame = subview.frame;
subviewFrame.origin.x = NAVIGATION_BTN_MARGIN;
subviewFrame.origin.y = (self.frame.size.height - subview.frame.size.height) / 2;
[subview setFrame:subviewFrame];
}
}
@end
希望能够有所帮助。
[[navigationItem leftBarButtonItem] customView]
或者[[navigationItem rightBarButtonItem] customView]
,然后直接设置这些框架即可。 - Rostyslav Druzhchenko我需要将我的按钮向右移动一些。以下是我使用Swift中的UIAppearance进行操作的方法。那里还有一个垂直位置属性,所以我想你可以在任何方向上进行调整。
UIBarButtonItem.appearance().setTitlePositionAdjustment(UIOffset.init(horizontal: 15, vertical: 0), forBarMetrics: UIBarMetrics.Default)
UIBarButtonItem *button = [[UIBarButtonItem alloc] initWithTitle:@"Logout" style:UIBarButtonItemStyleDone target:self action:nil];
[button setBackgroundVerticalPositionAdjustment:-20.0f forBarMetrics:UIBarMetricsDefault];
[[self navigationItem] setRightBarButtonItem:button];
这段代码用于改变'y'位置。根据您的需求更改'y'值(这里是-20.0f)。如果该值为正数,则会向下移动按钮位置。如果该值为负数,则会向上移动按钮位置。
使用改变左侧栏位置和图像边缘插入的导航栏
Swift 4
let leftBarButtonItem = UIBarButtonItem.init(image: UIImage(named:"ic_nav-bar_back.png"), landscapeImagePhone: nil, style: .plain, target: viewController, action: #selector(viewController.buttonClick(_:)))
leftBarButtonItem.imageInsets = UIEdgeInsets(top: 0, left: -15, bottom: 0, right: 0)
leftBarButtonItem.tintColor = UIColor(hex: 0xED6E19)
viewController.navigationItem.setLeftBarButton(leftBarButtonItem, animated: true)
如果您只是使用图像而不是默认的Chrome,则可以使用负图像插入(在“大小检查器”中设置)在UIBarButtonItem内部移动您的图像(非常方便,因为默认情况下,水平填充可能导致图像位于您想要的位置之内)。您还可以使用图像插入将图像定位在UIBarButtonItem的范围之外,而且左侧按钮区域周围的整个区域都可以点击,因此您无需担心其定位是否靠近触摸目标。 (至少,在合理范围内。)
更改barbuttonItem的框架以自定义间距
动态添加、删除barButtonItems。
通过tableview的contentOffset.y更改色调颜色。
如果您的最低目标是iOS 11,则可以在viewDidLayoutSubviews中更改barButton框架。
override func viewDidLayoutSubviews() {
super.viewDidLayoutSubviews()
// Change the navigationBar item frames
if let customView = wishButton.customView?.superview {
customView.transform = CGAffineTransform(translationX: 7.0, y: 0)
}
if let customView = gourmetCountButton.customView?.superview {
customView.transform = CGAffineTransform(translationX: 9.0, y: 0)
}
}
但是,它只适用于iOS 11。
我也尝试使用fixedSpace。但在多个navigationBarButton项目中它无效。
let space = UIBarButtonItem(barButtonSystemItem: .fixedSpace, target: nil, action: nil)
space.width = -10
因此,我将customView的宽度更改为调整水平空间。
这是我的barButtonItem类之一。
final class DetailShareBarButtonItem: UIBarButtonItem {
// MARK: - Value
// MARK: Public
***// Change the width to adjust space***
let button = UIButton(frame: CGRect(x: 0, y: 0, width: 32.0, height: 30.0))
override var tintColor: UIColor? {
didSet {
button.tintColor = tintColor
}
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
setButton()
}
required override init() {
super.init()
setButton()
}
// MARK: - Function
// MARK: Private
private func setButton() {
// Button
button.setImage( #imageLiteral(resourceName: "navibarIcShare02White").withRenderingMode(.alwaysTemplate), for: .normal)
button.tintColor = .white
button.imageEdgeInsets = UIEdgeInsetsMake(0, 1.0, 1.0, 0)
button.imageView?.contentMode = .scaleAspectFill
let containerView = UIView(frame: button.bounds)
containerView.backgroundColor = .clear
containerView.addSubview(button)
customView = containerView
}
}
这是结果。
我在iOS 9 ~ 11(Swift 4)上进行了测试。