友盟上偶现的一个崩溃信息 ，[MJProperty valueForObject:] + [MJProperty.m : 78]，一直排查不到

[wangyanxi2019]

CrashDoctor Diagnosis: Stack overflow in (null) Thread 0 Crashed: 0 CoreFoundation 0x000000019d38e56c _NSIsNSArray + [ : 4] 1 CoreFoundation 0x000000019d25dca0 -[NSArray isEqualToArray:] + [ : 96] 2 CoreFoundation 0x000000019d254080 -[__NSDictionaryM objectForKey:] + [ : 184] 3 CoreText 0x000000019e095284 TDescriptorSource::CopySpliceFontForName(__CFString const*, __CFString const*, __CFNumber const*, CTFontLegibilityWeight, __CFNumber const*, __CFString const*, __CFNumber const*) + [ : 384] 4 CoreText 0x000000019e08d644 TDescriptorSource::CopySplicedDescriptorForName(__CFString const*, __CFString const*, __CFString const*, __CFNumber const*, CTFontLegibilityWeight, __CFNumber const*, __CFString const*, __CFNumber const*) const + [ : 136] 5 CoreText 0x000000019e07c4f4 TDescriptor::CreateMatchingDescriptorInternal(__CFSet const*, unsigned long) const + [ : 1764] 6 CoreText 0x000000019e07cd50 TDescriptor::InitBaseFont(unsigned long, double) + [ : 76] 7 CoreText 0x000000019e05e0bc TDescriptor::Hash() const + [ : 56] 8 UIFoundation 0x00000001a09f7f7c -[_UIFontDescriptorCacheKey _hash] + [ : 52] 9 UIFoundation 0x00000001a09f78f0 -[_UIFontCacheKey _precalculateHash] + [ : 32] 10 UIFoundation 0x00000001a09f78a0 +[_UIFontCacheKey fontCacheKeyWithFontDescriptor:pointSize:textStyleForScaling:pointSizeForScaling:maximumPointSizeAfterScaling:textLegibility:] + [ : 200] 11 UIFoundation 0x00000001a0a08b54 +[UIFont _fontWithDescriptor:size:textStyleForScaling:pointSizeForScaling:maximumPointSizeAfterScaling:forIB:legibilityWeight:] + [ : 220] 12 PhotosUI 0x00000001ba8d16e0 -[UIFont(PhotosUI) pu_fontWithMonospacedNumbers] + [ : 456] 13 Foundation 0x000000019d650620 -[NSObject(NSKeyValueCoding) valueForKey:] + [ : 308] 14 MyApp 0x00000001052d9b5c -[MJProperty valueForObject:] + [MJProperty.m : 78] 15 MyApp 0x0000000104f30ff8 __57-[NSObject(MJKeyValue) mj_keyValuesWithKeys:ignoredKeys:]_block_invoke + [NSObject+MJKeyValue.m : 364] 16 MyApp 0x000000010525085c +[NSObject(Property) mj_enumerateProperties:] + [NSObject+MJProperty.m : 134] 17 MyApp 0x0000000104f30da8 -[NSObject(MJKeyValue) mj_keyValuesWithKeys:ignoredKeys:] + [NSObject+MJKeyValue.m : 435] 18 MyApp 0x0000000104f3105c __57-[NSObject(MJKeyValue) mj_keyValuesWithKeys:ignoredKeys:]_block_invoke + [NSObject+MJKeyValue.m : 371] 19 MyApp 0x000000010525085c +[NSObject(Property) mj_enumerateProperties:] + [NSObject+MJProperty.m : 134] 20 MyApp 0x0000000104f30da8 -[NSObject(MJKeyValue) mj_keyValuesWithKeys:ignoredKeys:] + [NSObject+MJKeyValue.m : 435] 21 MyApp 0x0000000104f3105c __57-[NSObject(MJKeyValue) mj_keyValuesWithKeys:ignoredKeys:]_block_invoke + [NSObject+MJKeyValue.m : 371] 22 MyApp 0x000000010525085c +[NSObject(Property) mj_enumerateProperties:] + [NSObject+MJProperty.m : 134] 23 MyApp 0x0000000104f30da8 -[NSObject(MJKeyValue) mj_keyValuesWithKeys:ignoredKeys:] + [NSObject+MJKeyValue.m : 435] 24 MyApp 0x0000000104f3105c __57-[NSObject(MJKeyValue) mj_keyValuesWithKeys:ignoredKeys:]_block_invoke + [NSObject+MJKeyValue.m : 371] 25 MyApp 0x000000010525085c +[NSObject(Property) mj_enumerateProperties:] + [NSObject+MJProperty.m : 134] 26 MyApp 0x0000000104f30da8 -[NSObject(MJKeyValue) mj_keyValuesWithKeys:ignoredKeys:] + [NSObject+MJKeyValue.m : 435] 27 MyApp 0x0000000104f3105c __57-[NSObject(MJKeyValue) mj_keyValuesWithKeys:ignoredKeys:]_block_invoke + [NSObject+MJKeyValue.m : 371] 28 MyApp 0x000000010525085c +[NSObject(Property) mj_enumerateProperties:] + [NSObject+MJProperty.m : 134] 29 MyApp 0x0000000104f30da8 -[NSObject(MJKeyValue) mj_keyValuesWithKeys:ignoredKeys:] + [NSObject+MJKeyValue.m : 435] 30 MyApp 0x0000000104f3105c __57-[NSObject(MJKeyValue) mj_keyValuesWithKeys:ignoredKeys:]_block_invoke + [NSObject+MJKeyValue.m : 371] 31 MyApp 0x000000010525085c +[NSObject(Property) mj_enumerateProperties:] + [NSObject+MJProperty.m : 134] 32 MyApp 0x0000000104f30da8 -[NSObject(MJKeyValue) mj_keyValuesWithKeys:ignoredKeys:] + [NSObject+MJKeyValue.m : 435]

[wolfcon]

请尝试 Refactor/4.0.0 这个分支.

请查看 这个列表, 还未发布. 如果想使用 pod. 可以添加如下命令

pod 'MJExtension', :git => 'https://github.com/CoderMJLee/MJExtension.git', :branch => 'Refactor/4.0.0'

[wangyanxi2019]

@wolfcon 非常感谢回复，我想问下 4.0.0什么时候发布啊？这个问题大概是什么原因啊？能方便加Q吗。1659781834

[wolfcon]

已知的问题是多线程问题.

你这个 crash 单凭这个日志也分析不出是啥. 你的模型转换是在不同线程处理的吗?

我近期整理下无用代码, 近期发布吧

[wangyanxi2019]

@wolfcon 感谢回复！我的模型转换没有单独设置线程。（主要是我没复现，都是友盟反馈结果。）

[wolfcon]

@wolfcon 感谢回复！我的模型转换没有单独设置线程。（主要是我没复现，都是友盟反馈结果。）

那模型转换发生在多线程环境下吗?

[wangyanxi2019]

我无法定位到具体是那个代码调用MJ

[wangyanxi2019]

@wolfcon 升级了4.0.0，有个问题 [NSObject(MJKeyValue) mj_unsafe_JSONObjectWithRecursiveMode:keys:ignoredKeys:managedIDs:] + [NSObject+MJKeyValue.m : 281] 。能看下是什么情况吗？

[wangyanxi2019]

[MJProperty numberForObject:] + [MJProperty.m : 170] [NSObject(MJKeyValue) mj_unsafe_JSONObjectWithRecursiveMode:keys:ignoredKeys:managedIDs:] + [NSObject+MJKeyValue.m : 283]

[wolfcon]

[MJProperty numberForObject:] + [MJProperty.m : 170] [NSObject(MJKeyValue) mj_unsafe_JSONObjectWithRecursiveMode:keys:ignoredKeys:managedIDs:] + [NSObject+MJKeyValue.m : 283]

这里的170行, 是 UInt 类型, 有对应模型数据吗? 能复现么?

[wangyanxi2019]

@wolfcon 我感觉还是3.4.1问题，依然再4.0.0出现，而且还多了几个bug。我现在还是回滚到3.4.1，然后继续排查到底是什么数据引起的。

[wangyanxi2019]

[MJProperty valueForObject:] 追查这个问题。

[wangyanxi2019]

@wolfcon 我尝试去复现，但是依然没找到。但是我故意创造一个model，model里面如果有UIImage属性，再使用 mj_keyValue,把model转成dict。会崩溃到

• (id)valueForObject:(id)object { if (self.type.KVCDisabled) return [NSNull null]; //bug 不支持的类型，有可能奔溃点 id value = [object valueForKey:self.name]; }

我虽然无法复现问题，这个地方怎么避免这种操作呢？@try也不行 ps：pod 'MJExtension', '~> 3.4.1'

[wolfcon]

老版本需要 ignore 掉 UIkit 属性

[wangyanxi2019]

嗯。我已经解决了。忽略掉UIImage，UIView,NSSet等。