Ios 当我使用UIWebView时，主线程被阻塞

今天我在我的应用程序中发现了一个与UIWebView相关的bug，有两种情况，我请求的url是

https://estore-cn.pandora.net/Bracelets-1/

当我使用UIWebView显示网页并退出该网页时，会调用webView的dealoc，但UI线程被阻止，几分钟后它会恢复

这是我在Xcode中按下

暂停程序执行

按钮时的线程堆栈

*线程#1:tid=0x580710，0x0000000180da3f6c libsystem_kernel.dylib`\u psynch_mutexwait+8，队列='com.apple.main thread'，停止原因=信号SIGSTOP
*帧0:0x0000000180da3f6c libsystem\u kernel.dylib`\u psynch\u mutexwait+8
帧#1:0x0000000180e7239c libsystem_pthread.dylib`_pthread_mutex_lock_wait+96
帧2:0x0000000180e7257c libsystem_pthread.dylib`_pthread_mutex_lock_slow+296
帧#3:0x00000001850dc3b0 WebCore`\u WebTryThreadLock（bool）+52
帧#4:0x00000001850dcb3c WebCore`WebThreadLock+108
帧#5:0x00000001865abfc0 UIKit`-[UIWebView解除锁定]+36
帧#6:0x000000010032ba64 QDaily`-[QDWebView dealloc]（self=0x00000001575f3980，_cmd=“dealloc”）+148位于QDWebView.m:63
帧#7:0x0000000180889ae8 libobjc.A.dylib`（匿名命名空间）：:AutoreleasePoolPage:：pop（void*）+508
帧#8:0x00000001810e89fc CoreFoundation`\u CFAutoreleasePoolPop+28
帧#9:0x00000001811bebc0 CoreFoundation`u CFRunLoopRun+1636
帧#10:0x00000001810e8c50 CoreFoundation`CFRunLoopRunSpecific+384
帧#11:0x00000001829d0088 GraphicsServices`GSEventRunModal+180
帧#12:0x00000001863d6088 UIKit`UIApplicationMain+204
帧#13:0x000000010037490cqdaily`main（argc=1，argv=0x000000016fd03af0）+172位于main处。m:16
帧#14:0x0000000180c868b8 libdyld.dylib`start+4

• 第二种情况是，当我开始跳转到webView页面时，同样的情况也发生了

线程1:tid=0x5801dc，0x0000000180da3f6c libsystem\u kernel.dylib`\u psynch\u mutexwait+8，队列='com.apple.main thread'，停止原因=信号SIGSTOP
帧0:0x0000000180da3f6c libsystem\u kernel.dylib`\u psynch\u mutexwait+8
帧#1:0x0000000180e7239c libsystem_pthread.dylib`_pthread_mutex_lock_wait+96
帧2:0x0000000180e7257c libsystem_pthread.dylib`_pthread_mutex_lock_slow+296
帧#3:0x00000001850dc3b0 WebCore`\u WebTryThreadLock（bool）+52
帧#4:0x00000001850dcb3c WebCore`WebThreadLock+108
框架#5:0x00000001867f3dc4 UIKit`-[UIWebView\u WebView CommonInitWithWebView:scalesPageToFit:+128
帧#6:0x00000001865a83ec UIKit`-[UIWebView initWithFrame:+80
帧#7:0x00000001002abb60 QDaily`-[QDWebView initWithFrame:（self=0x0000000000000000，_cmd=“initWithFrame:，frame=（原点=（x=0，y=20），大小=（宽度=414，高度=666））+120在QDWebView处。m:71
帧#8:0x0000000100212244 QDaily`-[QDSimpleWebViewController viewDidLoad]（self=0x000000013125070，_cmd=“viewDidLoad”）+796位于QDSimpleWebViewController.m:57
帧#9:0x000000018636cc40 UIKit`-[UIViewController loadViewIfRequired]+996
帧#10:0x00000001863850d0 UIKit`-[UIViewController uU VIEW将出现：][132
帧#11:0x000000018651fe5c UIKit`-[UINavigationController(U startCustomTransition:+1052
帧#12:0x000000018642be40 UIKit`-[UINavigationController(如果需要的话)启动DeferredTransition:+688
帧#13:0x000000018642bb1c UIKit`-[UINavigationController uu视图将布局子视图]+60
帧#14:0x000000018642ba84 UIKit`-[UILayoutContainerView布局子视图]+208
帧#15:0x00000001863681e4 UIKit`-[UIView（CALayerDelegate）布局层的子层：][656
帧#16:0x0000000183cf698c QuartzCore`-[CALayer layoutSublayers]+148
帧#17:0x0000000183cf15c8 QuartzCore`CA:：Layer:：layout(如果需要)（CA:：Transaction*）+292
帧#18:0x0000000183cf1488 QuartzCore`CA:：Layer:：layout_和_display_（如果需要）（CA:：Transaction*）+32
帧#19:0x0000000183cf0ab8 QuartzCore`CA:：Context:：commit#U事务（CA:：transaction*）+252
帧20:0x0000000183cf0818 QuartzCore`CA:：Transaction:：commit（）+500
帧#21:0x000000018636aff4 UIKit`\u UIApplicationHandleEventQueue+4980
帧#22:0x00000001811c109c CoreFoundation`\uuu CFRUNLOOP\u正在调用\u OUT\u以执行\u源0\u函数\uu+24
帧#23:0x00000001811c0b30 CoreFoundation`\uU CFRunLoopDoSources0+540
帧#24:0x00000001811be830 CoreFoundation`u CFRunLoopRun+724
帧#25:0x00000001810e8c50 CoreFoundation`CFRunLoopRunSpecific+384
帧#26:0x00000001829d0088 GraphicsServices`GSEventRunModal+180
帧#27:0x00000001863d6088 UIKit`UIApplicationMain+204
帧#28:0x00000001002f490c QDaily`main（argc=1，argv=0x000000016fd83af0）+172位于main处。m:16
帧#29:0x0000000180c868b8 libdyld.dylib`start+4

我不知道如何解决它

添加：这是发生死锁时的webThread

*线程#19:tid=0x58076c，0x00000001854180f0 WebCore`WTF:：HashMap:：remove（unsigned long const&）+164，name='WebThread'
*帧#0:0x00000001854180f0 WebCore`WTF:：HashMap:：remove（无符号长常量&）+164
帧#1:0x0000000185126e54 WebCore`WebCore:：DocumentLoader:：removeSubresourceLoader（WebCore:：ResourceLoader*）+40
帧#2:0x00000001851292a0 WebCore`WebCore:：ResourceLoader:：cancel（WebCore:：ResourceError const&）+492
帧#3:0x0000000185087764 WebCore`WebCore:：ResourceLoader:：init（WebCore:：ResourceRequest const&）+404
帧#4:0x00000001850873fc WebCore`WebCore:：SubresourceLoader:：startLoading（）+36
帧#5:0x000000018508735c WebCore`WebCore:：ResourceLoadScheduler:：servePendingRequests（WebCore:：ResourceLoadScheduler:：HostInformation*，WebCore:：ResourceLoadPriority）+516
帧6:0x00000001851070b8 WebCore`WebCore:：ResourceLoadScheduler:：servePendingRequests（WebCore:：ResourceLoadPriority）+412
帧#7:0x0000000185079f