简单的问题,如何删除标签栏项目文字并仅显示图片?
我想在Instagram应用中喜欢这些酒吧项目:
在xcode 6中的检查器中,我删除标题并选择@ 2x(50px)和@ 3x(75px)图像。但是,图像不使用已删除文本的可用空间。任何想法如何实现相同的标签栏项目图像,如在Instagram应用程序?
答案 0 :(得分:122)
您应该使用imageInsets
UITabBarItem
属性。以下是示例代码:
let tabBarItem = UITabBarItem(title: nil, image: UIImage(named: "more")
tabBarItem.imageInsets = UIEdgeInsets(top: 9, left: 0, bottom: -9, right: 0)
UIEdgeInsets
内的值取决于您的图片大小。以下是我的应用中代码的结果:
答案 1 :(得分:71)
// Remove the titles and adjust the inset to account for missing title
for(UITabBarItem * tabBarItem in self.tabBar.items){
tabBarItem.title = @"";
tabBarItem.imageInsets = UIEdgeInsetsMake(6, 0, -6, 0);
}
答案 2 :(得分:66)
以下是如何在故事板中执行此操作。
清除标题文字,并设置图像插图,如下面的屏幕截图
请记住,图标大小应遵循apple design guideline
这意味着你应该有@ 1x的25px x 25px,@ 2x的50px x 50px,@ 3x的75px x 75px
答案 3 :(得分:34)
使用方法将每个UITabBarItem
s title
属性设置为""
如果在视图控制器imageInsets
中设置,则更新self.title
无法正常工作。例如,如果self.viewControllers
中嵌入了UINavigationController
的UITabBarController,则需要在导航栏上显示标题。在这种情况下,使用UINavigationItem
直接设置self.navigationItem.title
标题,而不是self.title
。
答案 4 :(得分:24)
与iOS 11兼容
在设置viewController的标题后,在viewControllers的每个第一个子节点的viewDidLoad中调用此函数
最佳实践:
可选择@daspianist在评论中建议
创建类此类BaseTabBarController的子类: UITabBarController,UITabBarControllerDelegate并放置此函数 在子类的viewDidLoad
中
func removeTabbarItemsText() {
var offset: CGFloat = 6.0
if #available(iOS 11.0, *), traitCollection.horizontalSizeClass == .regular {
offset = 0.0
}
if let items = tabBar.items {
for item in items {
item.title = ""
item.imageInsets = UIEdgeInsetsMake(offset, 0, -offset, 0);
}
}
}
答案 5 :(得分:22)
如果你正在使用故事板,这将是你最好的选择。它遍历所有标签栏项目,并且每个项目标题都设置为空,并使图像全屏显示。 (您必须在故事板中添加图像)
for tabBarItem in tabBar.items!
{
tabBarItem.title = ""
tabBarItem.imageInsets = UIEdgeInsetsMake(6, 0, -6, 0)
}
答案 6 :(得分:13)
iOS 11在许多解决方案中引起了争论,所以我只是通过继承UITabBar并覆盖layoutSubviews来解决我在iOS 11上的问题。
class MainTabBar: UITabBar {
override func layoutSubviews() {
super.layoutSubviews()
// iOS 11: puts the titles to the right of image for horizontal size class regular. Only want offset when compact.
// iOS 9 & 10: always puts titles under the image. Always want offset.
var verticalOffset: CGFloat = 6.0
if #available(iOS 11.0, *), traitCollection.horizontalSizeClass == .regular {
verticalOffset = 0.0
}
let imageInset = UIEdgeInsets(
top: verticalOffset,
left: 0.0,
bottom: -verticalOffset,
right: 0.0
)
for tabBarItem in items ?? [] {
tabBarItem.title = ""
tabBarItem.imageInsets = imageInset
}
}
}
答案 7 :(得分:11)
我在BaseTabBarController的viewDidLoad中使用了以下代码。 请注意,在我的示例中,我有5个选项卡,所选图像将始终为base_image +" _selected"。
// Get tab bar and set base styles
let tabBar = self.tabBar;
tabBar.backgroundColor = UIColor.whiteColor()
// Without this, images can extend off top of tab bar
tabBar.clipsToBounds = true
// For each tab item..
let tabBarItems = tabBar.items?.count ?? 0
for i in 0 ..< tabBarItems {
let tabBarItem = tabBar.items?[i] as UITabBarItem
// Adjust tab images (Like mstysf says, these values will vary)
tabBarItem.imageInsets = UIEdgeInsetsMake(5, 0, -6, 0);
// Let's find and set the icon's default and selected states
// (use your own image names here)
var imageName = ""
switch (i) {
case 0: imageName = "tab_item_feature_1"
case 1: imageName = "tab_item_feature_2"
case 2: imageName = "tab_item_feature_3"
case 3: imageName = "tab_item_feature_4"
case 4: imageName = "tab_item_feature_5"
default: break
}
tabBarItem.image = UIImage(named:imageName)!.imageWithRenderingMode(.AlwaysOriginal)
tabBarItem.selectedImage = UIImage(named:imageName + "_selected")!.imageWithRenderingMode(.AlwaysOriginal)
}
答案 8 :(得分:10)
Swift 4方法
我能够通过实现一个带TabBarItem并对其进行格式化的函数来完成这个技巧。
向下移动图像以使其更加居中,并隐藏标签栏的文本。 比将其标题设置为空字符串更好,因为当你有一个NavigationBar时,TabBar在选中后重新获得viewController的标题
func formatTabBarItem(tabBarItem: UITabBarItem){
tabBarItem.imageInsets = UIEdgeInsets(top: 6, left: 0, bottom: -6, right: 0)
tabBarItem.setTitleTextAttributes([NSAttributedStringKey.foregroundColor:UIColor.clear], for: .selected)
tabBarItem.setTitleTextAttributes([NSAttributedStringKey.foregroundColor:UIColor.clear], for: .normal)
}
最新语法
extension UITabBarItem {
func setImageOnly(){
imageInsets = UIEdgeInsets(top: 6, left: 0, bottom: -6, right: 0)
setTitleTextAttributes([NSAttributedString.Key.foregroundColor:UIColor.clear], for: .selected)
setTitleTextAttributes([NSAttributedString.Key.foregroundColor:UIColor.clear], for: .normal)
}
}
只需在tabBar中使用它:
tabBarItem.setImageOnly()
答案 9 :(得分:5)
Swift 中的最小,安全的UITabBarController扩展(基于@ korgx9答案):
extension UITabBarController {
func removeTabbarItemsText() {
tabBar.items?.forEach {
$0.title = ""
$0.imageInsets = UIEdgeInsets(top: 6, left: 0, bottom: -6, right: 0)
}
}
}
答案 10 :(得分:4)
除了最佳答案之外,这是一种更好,更简单的方法:
[[UITabBarItem appearance] setTitleTextAttributes:@{NSForegroundColorAttributeName: [UIColor clearColor]}
forState:UIControlStateNormal];
[[UITabBarItem appearance] setTitleTextAttributes:@{NSForegroundColorAttributeName: [UIColor clearColor]}
forState:UIControlStateHighlighted];
将它放在AppDelegate.didFinishLaunchingWithOptions
中,以便在应用程序的整个生命周期中影响所有标签栏按钮。
答案 11 :(得分:2)
基于answer of ddiego,在 Swift 4.2 中:
extension UITabBarController {
func cleanTitles() {
guard let items = self.tabBar.items else {
return
}
for item in items {
item.title = ""
item.imageInsets = UIEdgeInsets(top: 6, left: 0, bottom: -6, right: 0)
}
}
}
您只需要在视图控制器中调用self.tabBarController?.cleanTitles()
。
答案 12 :(得分:0)
答案 13 :(得分:0)
最简单且始终有效的方法:
class TabBar: UITabBar {
override func layoutSubviews() {
super.layoutSubviews()
subviews.forEach { subview in
if subview is UIControl {
subview.subviews.forEach {
if $0 is UILabel {
$0.isHidden = true
subview.frame.origin.y = $0.frame.height / 2.0
}
}
}
}
}
}
答案 14 :(得分:0)
基于此页面上所有的出色答案,我制定了另一种解决方案,该解决方案还允许您再次显示标题。我没有删除标题的内容,而只是将字体颜色更改为透明。
extension UITabBarItem {
func setTitleColorFor(normalState: UIColor, selectedState: UIColor) {
self.setTitleTextAttributes([NSAttributedString.Key.foregroundColor: normalState], for: .normal)
self.setTitleTextAttributes([NSAttributedString.Key.foregroundColor: selectedState], for: .selected)
}
}
extension UITabBarController {
func hideItemsTitle() {
guard let items = self.tabBar.items else {
return
}
for item in items {
item.setTitleColorFor(normalState: UIColor(white: 0, alpha: 0), selectedState: UIColor(white: 0, alpha: 0))
item.imageInsets = UIEdgeInsets(top: 6, left: 0, bottom: -6, right: 0)
}
}
func showItemsTitle() {
guard let items = self.tabBar.items else {
return
}
for item in items {
item.setTitleColorFor(normalState: .black, selectedState: .yellow)
item.imageInsets = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 0)
}
}
}
答案 15 :(得分:0)
就我而言,在TabBar和其他导航流程中使用了相同的ViewController。在ViewController的内部,我设置了self.title = "Some Title"
,它出现在TabBar中,而与将标题nil
设置为空白还是在将其添加到标签栏时为空白无关。我还设置了imageInsets
如下:
item.imageInsets = UIEdgeInsets(top: 6, left: 0, bottom: -6, right: 0)
因此在ViewController中,我已按以下方式处理导航标题:
if isFromTabBar {
// Title for NavigationBar when ViewController is added in TabBar
// NOTE: Do not set self.title = "Some Title" here as it will set title of tabBarItem
self.navigationItem.title = "Some Title"
} else {
// Title for NavigationBar when ViewController is opened from navigation flow
self.title = "Some Title"
}
答案 16 :(得分:0)
创建UITabBarController的子类并将其分配给tabBar,然后在viewDidLoad方法中放置以下代码行:
tabBar.items?.forEach({ (item) in
item.imageInsets = UIEdgeInsets.init(top: 8, left: 0, bottom: -8, right: 0)
})
答案 17 :(得分:0)
自定义TabBar-iOS 13,Swift 5,XCode 11
基于故事板。也可以通过编程轻松实现。仅需遵循4个步骤:
标签栏图标必须为3种黑色大小。通常,我从fa2png.io下载-尺寸:25x25、50x50、75x75。 PDF图像文件不起作用!
在Storyboard中的选项卡栏项中,设置要通过Attributes Inspector使用的图标。 (请参见屏幕截图)
UITabBarController类
RoundedTabBarViewController类:UITabBarController {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
// Custom tab bar view
customizeTabBarView()
}
private func customizeTabBarView() {
let tabBarHeight = tabBar.frame.size.height
self.tabBar.layer.masksToBounds = true
self.tabBar.isTranslucent = true
self.tabBar.barStyle = .default
self.tabBar.layer.cornerRadius = tabBarHeight/2
self.tabBar.layer.maskedCorners = [.layerMaxXMaxYCorner, .layerMaxXMinYCorner, .layerMinXMaxYCorner, .layerMinXMinYCorner]
}
override func viewDidLayoutSubviews() {
super.viewDidLayoutSubviews()
let viewWidth = self.view.bounds.width
let leadingTrailingSpace = viewWidth * 0.05
tabBar.frame = CGRect(x: leadingTrailingSpace, y: 200, width: viewWidth - (2 * leadingTrailingSpace), height: 49)
}
}
答案 18 :(得分:0)
如果您希望在不使用魔术数字的情况下将标签居中/更改图像插图,则以下方法对我有用(在Swift 5.2.2中):
在 UITabBarController 子类中,可以在设置视图控制器之后添加添加图像插图。
override var viewControllers: [UIViewController]? {
didSet {
addImageInsets()
}
}
func addImageInsets() {
let tabBarHeight = tabBar.frame.height
for item in tabBar.items ?? [] where item.image != nil {
let imageHeight = item.image?.size.height ?? 0
let inset = CGFloat(Int((tabBarHeight - imageHeight) / 4))
item.imageInsets = UIEdgeInsets(top: inset,
left: 0,
bottom: -inset,
right: 0)
}
}
上面的几个选项列出了用于隐藏文本的解决方案。