ios - [CFNumber 保留] : message sent to deallocated instance

Question

每次我在我的应用程序中触发某个 segue 时，我都会收到 EXC_BAD_ACCESS 错误。多亏了这两个链接，我了解到启用 NSZombies 后可以更轻松地解决 EXC_BAD_ACCESS 问题。

How do I set up NSZombieEnabled in Xcode 4?

http://www.touch-code-magazine.com/how-to-debug-exc_bad_access/

我正在临时使用此应用程序并对其进行临时测试。 http://www.raywenderlich.com/13511/how-to-create-an-app-like-instagram-with-a-web-service-backend-part-12

应用加载时，会显示带有图片的 UIScrollView。当您点击一张图片时，将触发对该图片的全屏截图的推送转场。该应用程序在 iPad 上运行完美，但在我的 iPhone 4 上它每次在推送 segue 之前崩溃。我坚持了一个星期。我刚刚发现了 NSZombies 是什么以及如何启用它们:在我启用它们之后，配音员的内容如下:

2015-07-03 22:26:36.170 iReporter[1878:60b] *** -[CFNumber retain]: message sent to deallocated instance 0x172e6210

在学习了如何将“bt”输入调试器输出以获取更多信息之后，这就是调试器现在读取的内容；

* thread #1: tid = 0x7246e, 0x2f1e515c CoreFoundation`___forwarding___ + 540, queue = 'com.apple.main-thread', stop reason = EXC_BREAKPOINT (code=EXC_ARM_BREAKPOINT, subcode=0xdefe)
* frame #0: 0x2f1e515c CoreFoundation`___forwarding___ + 540
frame #1: 0x2f134768 CoreFoundation`_CF_forwarding_prep_0 + 24
frame #2: 0x2f11e5a8 CoreFoundation`+[__NSDictionaryM __new:::::] + 536
frame #3: 0x2f1212f0 CoreFoundation`-[__NSPlaceholderDictionary initWithObjects:forKeys:count:] + 240
frame #4: 0x2f125dcc CoreFoundation`+[NSDictionary dictionaryWithObjectsAndKeys:] + 372
frame #5: 0x000c96a4 iReporter`-[StreamPhotoScreen viewDidLoad](self=0x172e7560, _cmd=0x32053af3) + 256 at StreamPhotoScreen.m:20
frame #6: 0x31a044aa UIKit`-[UIViewController loadViewIfRequired] + 518
frame #7: 0x31a04268 UIKit`-[UIViewController view] + 24
frame #8: 0x31b9036a UIKit`-[UINavigationController _startCustomTransition:] + 634
frame #9: 0x31aadd62 UIKit`-[UINavigationController _startDeferredTransitionIfNeeded:] + 418
frame #10: 0x31aadb6c UIKit`-[UINavigationController __viewWillLayoutSubviews] + 44
frame #11: 0x31aadb04 UIKit`-[UILayoutContainerView layoutSubviews] + 184
frame #12: 0x319ffd58 UIKit`-[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 380
frame #13: 0x3167d62a QuartzCore`-[CALayer layoutSublayers] + 142
frame #14: 0x31678e3a QuartzCore`CA::Layer::layout_if_needed(CA::Transaction*) + 350
frame #15: 0x31678ccc QuartzCore`CA::Layer::layout_and_display_if_needed(CA::Transaction*) + 16
frame #16: 0x316786de QuartzCore`CA::Context::commit_transaction(CA::Transaction*) + 230
frame #17: 0x316784ee QuartzCore`CA::Transaction::commit() + 314
frame #18: 0x31a033e0 UIKit`_UIApplicationHandleEventQueue + 8232
frame #19: 0x2f1ae20a CoreFoundation`__CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 14
frame #20: 0x2f1ad6da CoreFoundation`__CFRunLoopDoSources0 + 206
frame #21: 0x2f1abece CoreFoundation`__CFRunLoopRun + 622
frame #22: 0x2f116ebe CoreFoundation`CFRunLoopRunSpecific + 522
frame #23: 0x2f116ca2 CoreFoundation`CFRunLoopRunInMode + 106
frame #24: 0x3401c662 GraphicsServices`GSEventRunModal + 138
frame #25: 0x31a6314c UIKit`UIApplicationMain + 1136
frame #26: 0x000c699c iReporter`main(argc=1, argv=0x27d44cec) + 108 at main.m:16
(lldb) 

如果我需要发布更多代码/信息，可能是这样的:(编辑器在崩溃时突出显示的代码部分有时还会告诉我它的 EXC_BAD_ACCESS_)

[api commandWithParams:[NSMutableDictionary dictionaryWithObjectsAndKeys:@"stream", @"command", IdPhoto,@"IdPhoto", nil] onCompletion:^(NSDictionary *json) {

我想做的就是使用 j son 调用上述数据并通过推送 segue 加载它。它在 iPad 上工作得很好，但在 iPhone 4 上每次都崩溃？

Answer 1

找到 NSNumber 属性声明，并检查你是否错误地给出了 assign 的类型。