我试图捕捉内存泄漏和保留周期与泄漏剖析工具在仪器工具。 然而，每当我点击仪器中的记录按钮时，app看起来像是启动然后崩溃。 如果我从Xcode打开应用程序并将其传输到Instruments，在我单击任何UIbutton后，应用程序崩溃。 如果我从模拟器打开应用程序，我可以得到第二个屏幕，但随后它也崩溃了。 此外，App在内存图中没有显示任何泄漏，在正常使用时也没有崩溃。
这是崩溃日志；
异常类型:EXC_BAD_ACCESS(SIGSEGV)异常子类型:KERN_INVALID_ADDRESS位于0x00000000000018 VM区域信息:0x18不在任何区域中。 以下区域之前的字节:4377985000区域类型开始-结束[VSIZE]PRT/MAX SHRMOD区域详细信息开始时未使用的空间-->
__text 0000000104F2C000-0000000104FBC000[576K]R-X/R-X SM=Co...TI应用程序测试]
终止信号:分段错误:11终止原因:命名空间信号，代码0xB终止进程:exc处理程序[0]由线程触发:0
筛选的syslog:找不到
线程0名称: 调度队列: com.apple.main-thread线程0崩溃: 0 libswiftcore.dylib 0x000000010597b2b4 0x1058cc000+717492 1 libswiftcore.dylib
0x000000010598823c 0x1058cc000+770620 2 uifoundation
0x000000018f01fbdc attributeDictionaryHash+460 3 Foundation
0x0000000185417edc hashProbe+72 4 Foundation
0x0000000185417e7c-[NSConcreteHashTable GetItem:] +40 5
UIFoundation 0x000000018f01fd54+[NSAttributeDictionary newWithDictionary:] +136 6基础0x000000018542666C-[NSConcreteAttributedString InitWithString:Attributes:] +124 7我的应用程序测试
0x0000000104FBB894 0x104F2C000+587924 8我的应用程序测试
0x0000000104FBA588 0x104F2C000+583048 9我的应用程序测试
0x0000000104FBA494 0x104F2C000+582804 10我的应用程序测试
0x0000000104FB9964 0x104F2C000+579940 11我的应用程序测试
0x0000000104FB9830 0x104F2C000+579632 12我的应用程序测试
0x0000000104FBC608 0x104F2C000 0x0000000104F85470 0x104F2C000+365680 20我的应用程序测试0x0000000104F85688 0x104F2C000+366216 21 UIKit 0x000000018DF6B20C-[UIApplication SendAction:To:From:Forevent:]+96 22 UIKit 0x000000018DF6B18C-[UIControl SendAction:To:Forevent:]+80 23 UIKit 0x000000018DF55F4C-[UIControl_SendActions Forevents:WithEvent:]+440 24 UIKit 0x000000018DF6AA80-[UIControl opDoSources0+204 34 CoreFoundation 0x0000000184ACD738__CFRunloopRun+1048 35 CoreFoundation
0x00000001849EE2D8 CFRunloopRun Specific+436 36 GraphicsServices
0x000000018687FF84 GSEventRunModal+100 37 UIKIT
0x000000018DF9A880 UIApplicationMain+208 38我的应用程序测试
0x0000000104F97854 0x104F2C000+440404 39 libdyld.dylib
0x000000018451256C start+4
线程1:0 libsystem_kernel.dylib 0x0000000184641dbc__workq_kernreturn+8 1 libsystem_pthread.dylib 0x0000000184753144_pthread_wqthread+1288 2
libsystem_pthread.dylib 0x0000000184752c30 start_wqthread+4
线程2:0 libsystem_pthread.dylib 0x0000000184752c2c start_wqthread+0
线程3名称:com.apple.UIKit.eventfetch-线程线程3:0
libsystem_kernel.dylib 0x0000000184620bc4 mach_msg_trap+8 1 libsystem_kernel.dylib 0x0000000184620a3c mach_msg+72 2
CoreFoundation 0x0000000184acfce4 CFRunLoopServiceMachPort+196 3 CoreFoundation 0x0000000184acd8b0__cfrunlooprun+1424 4 CoreFoundation
0x00000001849ee2d8
线程4:0 libsystem_pthread.dylib 0x0000000184752c2c start_wqthread+0
线程5名称:com.apple.nsurlConnectionLoader线程5:0
libsystem_kernel.dylib 0x0000000184620bc4 mach_msg_trap+8 1 libsystem_kernel.dylib 0x0000000184620a3c mach_msg+72 2
CoreFoundation 0x0000000184acfce4 CFRunLoopServiceMachPort+196 3 CoreFoundation 0x0000000184acd8b0__cfrunlooprun+1424 4 CoreFoundation
0x00000001849ee2d8
线程0崩溃，ARM线程状态（64位）:X0:0x00000001C4227AC0 X1:0x000000018ECA2DB2 X2:0x000000016AECF908 X3:0x000000000000000000000020X5:0x0000000000000020X6:0x000000000185426654 X7:0x0000000000000000000000X9:0x00000000000000X10:0x011949010119480X11:0x000000000119480X12:0x000000000001194800X
我搜索了一个月，我不确定这是不是一个仪器错误。 我查看了下面的帖子；
Xcode Instruments:泄漏-应用程序在启动时崩溃
使用漏电仪器时仪器撞毁
导致应用程序崩溃的xcode仪器
编辑:另一个崩溃日志。 在这个例子中，我打开应用程序并将内存转移到Instruments工具，然后触摸UIView顶部，打开一个新的控制器。
日期/时间:2018-07-06 15:13:34.5980+0300发布时间:2018-07-06 15:13:19.6298+0300操作系统版本:iPhone OS 11.0(15A372)基带版本:2.00.01报告版本:104
异常类型:EXC_BAD_ACCESS(SIGSEGV)异常子类型:KERN_INVALID_ADDRESS位于0x00000000000018 VM区域信息:0x18不在任何区域中。 以下区域之前的字节:4330094568区域类型起始-结束[VSIZE]PRT/MAX SHRMOD区域详细信息起始处未使用的空间-->
__text 0000000102180000-00000001022A0000[1152k]R-X/R-X SM=COW.。。TI Filo Test]
终止信号:分段错误:11终止原因:命名空间信号，代码0xB终止进程:exc处理程序[0]由线程触发:0
筛选的syslog:找不到
线程0名称:分派队列:com.apple.main-线程线程0崩溃:0 libswiftcore.dylib 0x0000000102bdf278 0x102b30000+717432 1 libswiftcore.dylib
0x0000000102bec1b0 0x102b30000+770480 2 corefoundation
0x0000000184a3ec80-[NSDictionary Allkey]+108 3 UIKit
0x000000018e15738c-[NSDictionary+2294668(UIStringDrawingKeyCompatibility） 2 UIKit 0x000000018E5B23FC_UigestureEnvironmentUpdate+1056 13 UIKit
0x000000018E5B1F88-[UigestureEnvironment_DeliverEvent:ToGestureRecognizers:UsingBlock:]+404 14 UIKit 0x000000018E5B10E4-[UigestureEnvironment_UpdateGestureForEvent:Window:]+276 15 UIKit 0x000000018DF65A54-[UIWindow Sendevent:]+3180 16 UIKit l+100 26 UIKIT
0x000000018DF9A880 UIApplicationMain+208 27我的应用程序测试
0x00000001021FACDC 0x102180000+503004 28 libdyld.dylib
0x000000018451256C启动+4
线程1:0 libsystem_pthread.dylib 0x0000000184752c2c start_wqthread+0
线程2:0 libsystem_pthread.dylib 0x0000000184752c2c start_wqthread+0
线程3:0 libsystem_pthread.dylib 0x0000000184752c2c start_wqthread+0
线程4名称:com.apple.UIKit.eventfetch-线程线程4:0
libsystem_kernel.dylib 0x0000000184620bc4 mach_msg_trap+8 1 libsystem_kernel.dylib 0x0000000184620a3c mach_msg+72 2
CoreFoundation 0x0000000184acfce4 CFRunLoopServiceMachPort+196 3 CoreFoundation 0x0000000184acd8b0__cfrunlooprun+1424 4 CoreFoundation
0x00000001849ee2d8
线程5名称:GAIThread线程5:0 libsystem_kernel.dylib
0x0000000184620bc4 mach_msg_trap+8 1 libsystem_kernel.dylib
0x0000000184620a3c mach_msg+72 2 CoreFoundation
0x0000000184acfce4 CFRunLoopServiceMachPort+196 3
CoreFoundation 0x0000000184acd8b0__cfrunlooprun+1424 4 CoreFoundation 0x00000001849ee2d8 CFRunLoopRunSpecific+436
线程6名称:com.apple.nsurlConnectionLoader线程6:0
libsystem_kernel.dylib 0x0000000184620bc4 mach_msg_trap+8 1 libsystem_kernel.dylib 0x0000000184620a3c mach_msg+72 2
CoreFoundation 0x0000000184acfce4 CFRunLoopServiceMachPort+196 3 CoreFoundation 0x0000000184acd8b0__cfrunlooprun+1424 4 CoreFoundation
0x00000001849ee2d8
线程0由于ARM线程状态（64位）而崩溃:x0:0x00000001C4227C60 x1:0x000000018ECA2DB2 x2:0x00000000000000000000000000X3:0x00000000010637E8D0 x4:0x0000000000000020X5:0x0000000000000020X6:0x0000000001021E82E8 x7:0x00000000000000B70 x8:0x0000000000000000X9:0x0000000000000000X10:0x01446B0101446B80X11:0x000000000001446B01
编辑:在@franticrock s的回答之后。 当我删除[UINavigationBarsetTitleTextAttributes:]时，detail类可以打开，但没有显示任何项（标题，后退按钮或任何单元格）。 它们都是空的，我还在漏水。
这里是controller类，我在这里编写[UINavigationBar SetTitleTextAttributes:]
class WelcomeViewController: BaseViewController {
let bgView = UIView()
let backgroundImage = UIImageView()
let logoImage: UIImageView = {
let i = UIImageView()
i.image = UIImage(named: "full_logo")
i.contentMode = .scaleAspectFit
return i
}()
let welcomeLabel : UILabel = {
let l = UILabel()
l.font = Fonts.font.withSize(24)
l.textColor = UIColor.white
l.textAlignment = .center
l.numberOfLines = 0
l.sizeToFit()
return l
}()
let loginLbl: UILabel = {
let l = UILabel()
l.font = Fonts.font.withSize(13)
l.textColor = UIColor.white
l.textAlignment = .center
l.numberOfLines = 0
l.sizeToFit()
return l
}()
let adminBtn: UIButton = {
let b = UIButton()
b.backgroundColor = Color.Common.buttonColor
b.layer.cornerRadius = 6.0
return b
}()
let userBtn: UIButton = {
let b = UIButton()
b.backgroundColor = Color.Common.buttonColor
b.layer.cornerRadius = 6.0
return b
}()
lazy var supportedServicesView = WelcomeScreenButtonView(text: getLabelText(key: CMSKeys.CMS_LBL_SUPPORTEDSERVICES), imageName: "phone")
lazy var incidentView = WelcomeScreenButtonView(text: getLabelText(key: CMSKeys.CMS_LBL_INCIDENT), imageName: "phone")
lazy var contactUsView = WelcomeScreenButtonView(text: getLabelText(key:CMSKeys.CMS_LBL_CONTACT), imageName: "phone")
lazy var moreView = WelcomeScreenButtonView(text: getLabelText(key:CMSKeys.CMS_LBL_MORE), imageName: "wdiger")
lazy var emergencyBtn = SendButton(text: "Button")
let firstStackView = UIStackView()
let secondStackView = UIStackView()
let thirdStackView = UIStackView()
let btnStackView = UIStackView()
override func viewDidLoad() {
super.viewDidLoad()
self.setPageID()
designUI()
}
override func viewDidAppear(_ animated: Bool) {
if(AppContext.instance.comesFromURL != nil){
comesFromURL()
}
}
override func viewWillAppear(_ animated: Bool) {
if(analyticsName != nil){
self.sendDataToGA()
}
}
override func viewDidLayoutSubviews() {
bgView.anchor(self.thirdStackView.topAnchor, left: self.view.leftAnchor, bottom: self.view.bottomAnchor, right: self.view.rightAnchor, topConstant: 40, leftConstant: 0, bottomConstant: 0, rightConstant: 0, widthConstant: 0, heightConstant: 0)
let margins = view.layoutMarginsGuide
thirdStackView.leadingAnchor.constraint(equalTo: margins.leadingAnchor,constant: 5).isActive = true
thirdStackView.trailingAnchor.constraint(equalTo: margins.trailingAnchor,constant: -5).isActive = true
thirdStackView.bottomAnchor.constraint(equalTo: self.emergencyBtn.topAnchor, constant: -10).isActive = true
thirdStackView.heightAnchor.constraint(equalTo: thirdStackView.widthAnchor, multiplier: 0.77).isActive = true
emergencyBtn.anchor(nil, left: self.view.leftAnchor, bottom: self.bottomLayoutGuide.topAnchor, right: self.view.rightAnchor, topConstant: 10, leftConstant: 20, bottomConstant: 20, rightConstant: 20, widthConstant: 0, heightConstant: 48)
if #available(iOS 11.0, *) {
logoImage.anchor(self.view.safeAreaLayoutGuide.topAnchor, left: self.view.leftAnchor, bottom: nil, right: self.view.rightAnchor, topConstant: 40, leftConstant: 80, bottomConstant: 0, rightConstant: 80, widthConstant: 0, heightConstant: 0)
} else {
logoImage.anchor(self.view.topAnchor, left: self.view.leftAnchor, bottom: nil, right: self.view.rightAnchor, topConstant: 40, leftConstant: 80, bottomConstant: 0, rightConstant: 80, widthConstant: 0, heightConstant: 0)
// Fallback on earlier versions
}
logoImage.anchorCenterXToSuperview()
let welcomeLblHeight = heightForView(text: "Welcome", font: welcomeLabel.font, width: self.view.bounds.width)
let loginLblHeight = heightForView(text: "Please Log In", font: loginLbl.font, width: self.view.bounds.width)
welcomeLabel.anchor(self.logoImage.bottomAnchor, left: self.view.leftAnchor, bottom: nil, right: self.view.rightAnchor, topConstant: 0, leftConstant: 50, bottomConstant: 0, rightConstant: 50, widthConstant: 0, heightConstant: welcomeLblHeight)
loginLbl.anchor(self.welcomeLabel.bottomAnchor, left: self.view.leftAnchor, bottom: nil, right: self.view.rightAnchor, topConstant: 10, leftConstant: 50, bottomConstant: 0, rightConstant: 50, widthConstant: 0, heightConstant: loginLblHeight)
btnStackView.anchor(nil, left: self.view.leftAnchor, bottom: self.thirdStackView.topAnchor, right: self.view.rightAnchor, topConstant: 0, leftConstant: 20, bottomConstant: 20, rightConstant: 20, widthConstant: 0, heightConstant: 50)
backgroundImage.frame = CGRect(x: 0, y: 0, width: self.view.frame.width, height: self.view.frame.height - self.bgView.frame.height)
}
private func designUI(){
self.view.translatesAutoresizingMaskIntoConstraints = true
backgroundImage.image = UIImage(named: "background.png")
backgroundImage.contentMode = .scaleAspectFill
self.view.insertSubview(backgroundImage, at: 0)
bgView.backgroundColor = Color.Common.welcomeScreenBackgroundColor
self.view.insertSubview(bgView, at: 1)
view.addSubview(logoImage)
welcomeLabel.text = getLabelText(key: CMSKeys.CMS_LBL_WELCOME)
view.addSubview(welcomeLabel)
loginLbl.text = getLabelText(key: CMSKeys.CMS_LBL_LOGIN)
view.addSubview(loginLbl)
adminBtn.backgroundColor = Color.Common.adminGreen
adminBtn.setTitle(getLabelText(key: CMSKeys.CMS_BTN_ADMIN), for: .normal)
adminBtn.addTarget(self, action: #selector(adminBtnTapped(_:)), for: .touchUpInside)
userBtn.backgroundColor = Color.Common.userGreen
userBtn.setTitle(getLabelText(key: CMSKeys.CMS_BTN_USER), for: .normal)
userBtn.addTarget(self, action: #selector(userBtnTapped(_:)), for: .touchUpInside)
btnStackView.axis = UILayoutConstraintAxis.horizontal
btnStackView.distribution = UIStackViewDistribution.fillEqually
btnStackView.alignment = UIStackViewAlignment.fill
btnStackView.spacing = 10.0
btnStackView.addArrangedSubview(adminBtn)
btnStackView.addArrangedSubview(userBtn)
btnStackView.translatesAutoresizingMaskIntoConstraints = false
self.view.addSubview(btnStackView)
firstStackView.axis = UILayoutConstraintAxis.vertical
firstStackView.distribution = UIStackViewDistribution.fillEqually
firstStackView.alignment = UIStackViewAlignment.fill
firstStackView.spacing = 10.0
firstStackView.addArrangedSubview(supportedServicesView)
firstStackView.addArrangedSubview(contactUsView)
firstStackView.translatesAutoresizingMaskIntoConstraints = false
secondStackView.axis = UILayoutConstraintAxis.vertical
secondStackView.distribution = UIStackViewDistribution.fillEqually
secondStackView.alignment = UIStackViewAlignment.fill
secondStackView.spacing = 10.0
secondStackView.addArrangedSubview(incidentView)
secondStackView.addArrangedSubview(moreView)
secondStackView.translatesAutoresizingMaskIntoConstraints = false
thirdStackView.axis = UILayoutConstraintAxis.horizontal
thirdStackView.distribution = UIStackViewDistribution.fillEqually
thirdStackView.alignment = UIStackViewAlignment.fill
thirdStackView.spacing = 10.0
thirdStackView.addArrangedSubview(firstStackView)
thirdStackView.addArrangedSubview(secondStackView)
thirdStackView.translatesAutoresizingMaskIntoConstraints = false
view.addSubview(thirdStackView)
//View Tap Gestures
let tapSupportedServices = UITapGestureRecognizer(target: self, action: #selector(self.tapSupportedServices(_:)))
supportedServicesView.addGestureRecognizer(tapSupportedServices)
supportedServicesView.isUserInteractionEnabled = true
let tapIncidentView = UITapGestureRecognizer(target: self, action: #selector(self.tapIncident(_:)))
incidentView.addGestureRecognizer(tapIncidentView)
incidentView.isUserInteractionEnabled = true
let tapContactUs = UITapGestureRecognizer(target: self, action: #selector(self.tapContactUs(_:)))
contactUsView.addGestureRecognizer(tapContactUs)
contactUsView.isUserInteractionEnabled = true
let tapMoreView = UITapGestureRecognizer(target: self, action: #selector(self.tapMore(_:)))
moreView.addGestureRecognizer(tapMoreView)
moreView.isUserInteractionEnabled = true
emergencyBtn.layer.cornerRadius = 6.0
emergencyBtn.addTarget(self, action: #selector(emergenyBtnTapped(_:)), for: .touchUpInside)
self.view.addSubview(emergencyBtn)
}
@objc func tapSupportedServices(_ sender: UITapGestureRecognizer) {
let linkingVC = SupportedServicesFirstViewController()
let controller = createNavController(title: "Services", viewController: linkingVC)
self.present(controller, animated: true)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
private func heightForView(text:String, font:UIFont, width:CGFloat) -> CGFloat{
let label:UILabel = UILabel(frame: CGRect(x: 0, y: 0, width: width, height: CGFloat.greatestFiniteMagnitude))
label.numberOfLines = 0
label.lineBreakMode = NSLineBreakMode.byWordWrapping
label.font = font
label.text = text
label.sizeToFit()
return label.frame.height
}
//Gets a Title and a ViewController then returns a UINavigationController with attributes
private func createNavController(title: String, viewController: UIViewController) -> UINavigationController {
viewController.view.backgroundColor = UIColor(red:0.87, green:0.87, blue:0.87, alpha:1.0)
let navController = UINavigationController(rootViewController: viewController)
navController.navigationBar.topItem?.title = title
navController.navigationBar.barTintColor = Color.NavigationBar.tintColor
navController.navigationBar.tintColor = UIColor.white
//Fix: Leak
navController.navigationBar.titleTextAttributes = [NSAttributedStringKey.foregroundColor: Color.NavigationBar.textColor]
return navController
}
private func removeViews(){
self.emergencyBtn.removeFromSuperview()
self.incidentView.removeFromSuperview()
self.moreView.removeFromSuperview()
self.supportedServicesView.removeFromSuperview()
self.contactUsView.removeFromSuperview()
}
deinit {
print("Welcome Deinited")
removeViews()
}
}
在第一个堆栈跟踪中，有与以下内容相关的代码:[UINavigationBar SetTitleTextAttributes:]
它试图通过设置标题上的文本属性来自定义导航栏。 你在这么做吗？ 你能试着评论一下这个问题吗，看看问题会不会消失？
从技术上讲，你所得到的并不是内存泄漏。 您正在访问释放的对象。 您可以做的另一件事是在您正在运行的方案上启用僵尸对象，并查看是否可以获得关于哪个对象被释放的信息。
现在，如果上面的堆栈跟踪没有引导您找到任何您直接编写的代码，并且您说您已经使用了内存调试图工具，并且没有找到任何对正在检查泄漏的任何对象的强引用，那么我将在这里使用一种更有创造性的方法来查找问题。 我常用的方法是消除。 开始注释掉控制器的大部分，直到只剩下空壳。 每次，您都可以将代码削减一半（记录性能），并重新测试代码的哪一部分引用了释放的对象。
显然，由于正常的应用程序操作不会导致错误的访问异常，所以它可能与XCode/Instruments内部机制有关，但是上面的setTitleTextAttributes看起来很可疑，我将首先尝试缩小问题是否与导航栏有关的范围。 您是否对导航栏UI的导航层次结构或自定义做了什么奇怪的事情？
还要检查以前的导航事件/实例中的内存中是否存在同一视图控制器的其他实例。。。 这听起来像是一个UI对象正在被释放，然后由一个异步进程稍后更新。
同时覆盖您的deinit{}。 方法并在其中放入一个print语句，以检测正在释放的所有相关对象。 这将有助于缩小，哪个控制器正在释放和访问稍后。
它是发生在所有iOS版本/设备型号上，还是只发生在特定的版本/设备型号上？
这个问题提出了两个问题。 第一个问题是为什么分析会中断，第二个问题是为什么您的应用程序会出现释放后使用的问题。
@FranicRock对第二个问题提出了很大的建议。
对于分析问题，我的建议是尝试一种变通方法。 如果您的应用程序可以用Beta XCode10.0编译，那么您可以进入Edit Schema(命令-<)，并在Diagnostics选项卡中为您的运行操作单击Logging Malloc Stack with子选项All Allocation and Free history。 然后您可以:
你既可以自己研究记忆图，也可以把它放在像Pastebin这样的公共位置，让其他人提供见解。 苹果公司有一个关于这种新方法的信息丰富的视频:WWDC-2018-416-Memory-Deep-Dive
