之前版本中会有数组越界或者字典中插入nil导致闪退。上个版本就写了四个分类将系统的类objectAtIndex:和 objectAtIndexedSubscript:等等方法交换一下进行安全校验。结果导致闪退bug增加很多。在此记录一下方便以后查找
闪退复现步骤:
当键盘显示的情况下 home app 进入后台，再单击app 图标 切换回前台时会出现crash。拿出iOS8的测试机尝试后果然能复现。查看闪退日志从iOS8-iOS10都有闪退
1.在iOS8上闪退堆栈信息
libobjc.A.dylib objc_msgSend + 28
1 libsystem_blocks.dylib _Block_release + 256
2 libobjc.A.dylib (anonymous namespace)::AutoreleasePoolPage::pop(void*) + 564
3 CoreFoundation _CFAutoreleasePoolPop + 28
4 UIKit __wrapRunLoopWithAutoreleasePoolHandler + 76
5 CoreFoundation ___CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 32
6 CoreFoundation ___CFRunLoopDoObservers + 360
7 CoreFoundation ___CFRunLoopRun + 836
8 CoreFoundation CFRunLoopRunSpecific + 396
9 GraphicsServices GSEventRunModal + 168
10 UIKit UIApplicationMain + 1488
2.在iOS9上闪退堆栈信息
libobjc.A.dylib objc_release + 16
1 libsystem_blocks.dylib _Block_release + 156
2 libobjc.A.dylib (anonymous namespace)::AutoreleasePoolPage::pop(void*) + 508
3 CoreFoundation _CFAutoreleasePoolPop + 28
4 UIKit __prepareForCAFlush + 352
5 UIKit __afterCACommitHandler + 160
6 CoreFoundation ___CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 32
7 CoreFoundation ___CFRunLoopDoObservers + 372
8 CoreFoundation ___CFRunLoopRun + 928
9 CoreFoundation CFRunLoopRunSpecific + 384
10 GraphicsServices GSEventRunModal + 180
11 UIKit UIApplicationMain + 204
3.在iOS10上闪退堆栈信息
libobjc.A.dylib objc_object::release() + 8
1 libsystem_blocks.dylib _Block_release + 160
2 UIKit -[UIKeyboardTaskEntry dealloc] + 68
3 libobjc.A.dylib (anonymous namespace)::AutoreleasePoolPage::pop(void*) + 836
4 CoreFoundation _CFAutoreleasePoolPop + 28
5 UIKit __prepareForCAFlush + 596
6 UIKit __afterCACommitHandler + 236
7 CoreFoundation ___CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 32
8 CoreFoundation ___CFRunLoopDoObservers + 372
9 CoreFoundation ___CFRunLoopRun + 956
10 CoreFoundation CFRunLoopRunSpecific + 424
11 GraphicsServices GSEventRunModal + 100
12 UIKit UIApplicationMain + 208
解决方案：
通过Build Phases中 -> Compile Sources 找到了这几个 Category改成mac：-fno-objc-arc
BF816544-22AA-4ADF-992C-E77AD5172E6F.png
参考链接
1.https://shevakuilin.github.io/2018/08/14/%E4%BF%AE%E5%A4%8D%E4%B8%80%E4%B8%AA%E7%94%B1Hook%E7%B3%BB%E7%BB%9F%E7%B1%BB%E8%80%8C%E5%BC%95%E5%8F%91%E7%9A%84Crash/
2.https://juejin.im/post/5b5746356fb9a04fd4509d5b
