iOS 12.1上的UITabBar项目向后跳跃导航
我有一个iOS应用程序,主屏幕上有iOS 12.1上的UITabBar项目向后跳跃导航,ios,swift,uitabbar,Ios,Swift,Uitabbar,我有一个iOS应用程序,主屏幕上有UITabBarController,导航到一个细节屏幕,隐藏UITabBarController,设置为hidesBottomBarWhenPushed=true 返回主屏幕时,UITabBarController会执行一个奇怪的“跳转”,如图所示: 只有在iOS 12.1上才会发生这种情况,而不是在12.0或11.x上 看起来像是iOS 12.1的bug,因为我注意到其他应用程序,比如FB Messenger,也有这种行为,但我想知道,有什么解决办法吗?我
UITabBarController
,导航到一个细节屏幕,隐藏UITabBarController
,设置为hidesBottomBarWhenPushed=true
返回主屏幕时,UITabBarController
会执行一个奇怪的“跳转”,如图所示:
只有在iOS 12.1上才会发生这种情况,而不是在12.0或11.x上
看起来像是iOS 12.1的bug,因为我注意到其他应用程序,比如FB Messenger,也有这种行为,但我想知道,有什么解决办法吗?我想这是苹果的bug
但您可以尝试将其作为热修复程序:只需使用以下代码为tabBar创建一个类:
import UIKit
class FixedTabBar: UITabBar {
var itemFrames = [CGRect]()
var tabBarItems = [UIView]()
override func layoutSubviews() {
super.layoutSubviews()
if itemFrames.isEmpty, let UITabBarButtonClass = NSClassFromString("UITabBarButton") as? NSObject.Type {
tabBarItems = subviews.filter({$0.isKind(of: UITabBarButtonClass)})
tabBarItems.forEach({itemFrames.append($0.frame)})
}
if !itemFrames.isEmpty, !tabBarItems.isEmpty, itemFrames.count == items?.count {
tabBarItems.enumerated().forEach({$0.element.frame = itemFrames[$0.offset]})
}
}
}
导入UIKit
阿巴尔延伸{
打开覆盖函数布局子视图(){
super.layoutSubviews()
如果让UITabBarButtonClass=NSClassFromString(“UITabBarButton”)作为?NSObject.Type{
let subItems=self.subviews.filter({return$0.isKind(of:UITabBarButtonClass)})
如果subItems.count>0{
让tmpWidth=UIScreen.main.bounds.width/CGFloat(subItems.count)
对于子项中的(索引,项)。枚举(){
item.frame=CGRect(x:CGFloat(索引)*tmpWidth,y:0,宽度:tmpWidth,高度:item.bounds.height)
}
}
}
}
打开覆盖函数hitTest(uPoint:CGPoint,带有事件:UIEvent?->UIView{
如果让视图:uitabar=super.hitTest(点,带:事件)作为?uitabar{
对于视图中的项。子视图{
如果point.x>=item.frame.origin.x&&point.x有两种方法可以解决此问题,
首先,在UITabBarController中,设置isTranslucent=false,如下所示:
[[UITabBar appearance] setTranslucent:NO];
第二,如果第一个解决方案无法解决您的问题,请尝试以下方法:
这是Objective-C代码
// .h
@interface CYLTabBar : UITabBar
@end
// .m
#import "CYLTabBar.h"
CG_INLINE BOOL
OverrideImplementation(Class targetClass, SEL targetSelector, id (^implementationBlock)(Class originClass, SEL originCMD, IMP originIMP)) {
Method originMethod = class_getInstanceMethod(targetClass, targetSelector);
if (!originMethod) {
return NO;
}
IMP originIMP = method_getImplementation(originMethod);
method_setImplementation(originMethod, imp_implementationWithBlock(implementationBlock(targetClass, targetSelector, originIMP)));
return YES;
}
@implementation CYLTabBar
+ (void)load {
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
if (@available(iOS 12.1, *)) {
OverrideImplementation(NSClassFromString(@"UITabBarButton"), @selector(setFrame:), ^id(__unsafe_unretained Class originClass, SEL originCMD, IMP originIMP) {
return ^(UIView *selfObject, CGRect firstArgv) {
if ([selfObject isKindOfClass:originClass]) {
if (!CGRectIsEmpty(selfObject.frame) && CGRectIsEmpty(firstArgv)) {
return;
}
}
// call super
void (*originSelectorIMP)(id, SEL, CGRect);
originSelectorIMP = (void (*)(id, SEL, CGRect))originIMP;
originSelectorIMP(selfObject, originCMD, firstArgv);
};
});
}
});
}
@end
更多信息:这里有一个解决方案,可以处理添加或删除的旋转和选项卡栏项:
class FixedTabBar: UITabBar {
var buttonFrames: [CGRect] = []
var size: CGSize = .zero
override func layoutSubviews() {
super.layoutSubviews()
if UIDevice.current.systemVersion >= "12.1" {
let buttons = subviews.filter {
String(describing: type(of: $0)).hasSuffix("Button")
}
if buttonFrames.count == buttons.count, size == bounds.size {
zip(buttons, buttonFrames).forEach { $0.0.frame = $0.1 }
} else {
buttonFrames = buttons.map { $0.frame }
size = bounds.size
}
}
}
}
谢谢你的想法,
我刚刚将c内联函数改为OC static方法,因为我不会过多地使用这个重写实现
static CGFloat const kIPhoneXTabbarButtonErrorHeight = 33;
static CGFloat const kIPhoneXTabbarButtonHeight = 48;
@implementation FixedTabBar
typedef void(^NewTabBarButtonFrameSetter)(UIView *, CGRect);
typedef NewTabBarButtonFrameSetter (^ImpBlock)(Class originClass, SEL originCMD, IMP originIMP);
+ (BOOL)overrideImplementationWithTargetClass:(Class)targetClass targetSelector:(SEL)targetSelector implementBlock:(ImpBlock)implementationBlock {
Method originMethod = class_getInstanceMethod(targetClass, targetSelector);
if (!originMethod) {
return NO;
}
IMP originIMP = method_getImplementation(originMethod);
method_setImplementation(originMethod, imp_implementationWithBlock(implementationBlock(targetClass, targetSelector, originIMP)));
return YES;
}
+ (void)load {
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
if (@available(iOS 12.1, *)) {
[self overrideImplementationWithTargetClass:NSClassFromString(@"UITabBarButton")
targetSelector:@selector(setFrame:)
implementBlock:^NewTabBarButtonFrameSetter(__unsafe_unretained Class originClass, SEL originCMD, IMP originIMP) {
return ^(UIView *selfObject, CGRect firstArgv) {
if ([selfObject isKindOfClass:originClass]) {
if (!CGRectIsEmpty(selfObject.frame) && CGRectIsEmpty(firstArgv)) {
return;
}
if (firstArgv.size.height == kIPhoneXTabbarButtonErrorHeight) {
firstArgv.size.height = kIPhoneXTabbarButtonHeight;
}
}
void (*originSelectorIMP)(id, SEL, CGRect);
originSelectorIMP = (void (*)(id, SEL, CGRect))originIMP;
originSelectorIMP(selfObject, originCMD, firstArgv);
};
}];
}
});
}
@end
在您的UITabBarController
中,设置isTranslucent=false
以下是swift代码
extension UIApplication {
open override var next: UIResponder? {
// Called before applicationDidFinishLaunching
SwizzlingHelper.enableInjection()
return super.next
}
}
类SwizzlingHelper{
static func enableInjection() {
DispatchQueue.once(token: "com.SwizzlingInjection") {
//what to need inject
UITabbarButtonInjection.inject()
}
}
更多信息我面临着完全相同的问题,应用程序的架构是每个选项卡一个导航控制器。我发现解决这个问题的最简单的非黑客方法是将uitabarcontroller
放在UINavigationController
内,然后移除单个UINavigationController
s
之前:
-> UINavigationController -> UIViewController
-> UINavigationController -> UIViewController
UITabBarController -> UINavigationController -> UIViewController
-> UINavigationController -> UIViewController
-> UINavigationController -> UIViewController
-> UIViewController
-> UIViewController
UINavigationController -> UITabBarController -> UIViewController
-> UIViewController
-> UIViewController
之后:
-> UINavigationController -> UIViewController
-> UINavigationController -> UIViewController
UITabBarController -> UINavigationController -> UIViewController
-> UINavigationController -> UIViewController
-> UINavigationController -> UIViewController
-> UIViewController
-> UIViewController
UINavigationController -> UITabBarController -> UIViewController
-> UIViewController
-> UIViewController
通过使用外部UINavigationController
,将视图控制器推到导航堆栈上时,不需要隐藏uitabar
注意事项:
-> UINavigationController -> UIViewController
-> UINavigationController -> UIViewController
UITabBarController -> UINavigationController -> UIViewController
-> UINavigationController -> UIViewController
-> UINavigationController -> UIViewController
-> UIViewController
-> UIViewController
UINavigationController -> UITabBarController -> UIViewController
-> UIViewController
-> UIViewController
到目前为止,我发现的唯一问题是,在每个UIViewController
上设置标题或右/左栏按钮项没有相同的效果。为了解决这个问题,我在可见的UIViewController
发生更改时,通过uiabbarcontrollerdelegate
应用了更改
func tabBarController(_ tabBarController: UITabBarController, didSelect viewController: UIViewController) {
guard let topItem = self.navigationController?.navigationBar.topItem else { return }
precondition(self.navigationController == viewController.navigationController, "Navigation controllers do not match. The following changes might result in unexpected behaviour.")
topItem.title = viewController.title
topItem.titleView = viewController.navigationItem.titleView
topItem.leftBarButtonItem = viewController.navigationItem.leftBarButtonItem
topItem.rightBarButtonItem = viewController.navigationItem.rightBarButtonItem
}
请注意,我添加了一个预处理失败
,以捕获导航架构被修改时出现的任何情况苹果现在已经在iOS 12.1.1中修复了这一问题如果您仍然想保持选项卡栏半透明,则需要从UITabBar
中进行子类化,并覆盖属性安全区域插入
class MyTabBar: UITabBar {
private var safeInsets = UIEdgeInsets.zero
@available(iOS 11.0, *)
override var safeAreaInsets: UIEdgeInsets {
set {
if newValue != UIEdgeInsets.zero {
safeInsets = newValue
}
}
get {
return safeInsets
}
}
}
这样做的目的是不允许系统将插入设置为零,这样选项卡栏就不会跳转。您可以通过以下方式覆盖-(UIEdgeInsets)安全区域插入方法,用于一些iOS 12子版本:
- (UIEdgeInsets)safeAreaInsets {
UIEdgeInsets insets = [super safeAreaInsets];
CGFloat h = CGRectGetHeight(self.frame);
if (insets.bottom >= h) {
insets.bottom = [self.window safeAreaInsets].bottom;
}
return insets;
}
在我的例子(iOS 12.1.4)中,我发现这种奇怪的glitchy行为是由使用.modalPresentationStyle=.fullScreen
在将他们的presentationStyle更新为。全屏
后,故障消失了。我想知道为什么还没有发布(或者可能我错过了!)。它甚至出现在whatsApp上。新的iOS 12.1.1(目前作为测试版发布)已经解决了这一问题好主意,我想尝试一下,但使用自定义的UITabBar
和UITabBarController
并不是那么容易…现在尝试一下,似乎很有希望,只是无法处理方向change@IgorKulman我没有用不同的方向测试它…我会试着在weekend@user10589608我收回它,在6S上工作,但在XS Max上不工作,在XS Max上,UI看起来非常不亮,在将设备旋转到景观时也会不亮。您应该提到,您的代码引用自UITabBarController中的『github.com/QMUI/QMUI_iOS/issues/410』,[self.tabBar setTranslucent:NO]
很有效!谢谢。如果您想保持选项卡栏半透明,这很难解决问题。这很有效,但如果您想保持选项卡半透明,请尝试我的解决方案:为什么会发生这种情况,以及为什么要将选项卡栏设置为半透明来解决它?现在我遇到了tableView底部插入的问题:(这只是iOS 12中的一个bug,还是以前也存在过?我在12.1.0中遇到过这个bug,然后将我的iPhone更新为12.1.2,所以这个bug现在消失了。但是我想知道我应该从所有以前的iOS版本中限制它,还是只限于12.1.0版本。thanx!@SerjRubens这个bug是在iOS 12中引入的,在iOS 12.1.1中修复的。我不知道该怎么办。)你的意思是限制以前iOS版本的bug啊,好吧,这就是我想知道的,谢谢:)p.s.限制mb不是一个好词,但我添加了如下条件以避免以前版本的bug:tabBar.isTranslucent=ProcessInfo().IsoperatingSystemMatleast(OperatingSystemVersion(majorVersion:12,minorVersion:1,patchVersion:1))。所以现在我可以更改它,只要你说它在版本中还可以