description.pointee.isGeneric代码崩溃stop reason = EXC_BAD_ACCESS

[misaka14]

杰哥，你好，想使用KakaJSON获取类的metadata数据，遇到一个崩溃

• 1、有一个OC的类WTStudent

  
  @interface WTStudent : NSObject

@end

@interface WTPerson : NSObject @property (nonatomic, strong) NSString name; @property (nonatomic, assign) NSUInteger age; @property (nonatomic, strong) WTStudent stu; @end

* 2、Swift中的`Student`继承`WTPerson`

class Student: WTPerson {

}

* 3、获取`Student`的MetaData数据

let mt = Metadata.type(Student.self) as? ModelType

* 4、崩溃点

• thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0x2c) frame #0: 0x00007fff51b2c94d libsystem_platform.dylib_platform_memmove$VARIANT$Haswell + 77 frame #1: 0x0000000100b7398b Metadata扫描__swift_memcpy60_4 at :0
  • frame #2: 0x0000000100b5276d Metadata扫描NominalType<>.builtGenericTypes(self=0x00006000022f4630) at Type.swift:47:25 frame #3: 0x0000000100b437c0 Metadata扫描ClassType.build(self=0x00006000022f4630) at ClassType.swift:18:24 frame #4: 0x0000000100b561a2 Metadata扫描BaseType.init(name="WTPerson", type=WTPerson, kind=class, self=0x00006000022f4630) at BaseType.swift:22:9 frame #5: 0x0000000100b6282e Metadata扫描ModelType.init(name="WTPerson", type=WTPerson, kind=class) at :0 frame #6: 0x0000000100b44b3b Metadata扫描ClassType.init(name="WTPerson", type=WTPerson, kind=class) at <compiler-generated>:0 frame #7: 0x0000000100b449bc Metadata扫描ClassType.__allocating_init(name:type:kind:) at ClassType.swift:0 frame #8: 0x0000000100b72c9d Metadata扫描static Metadata.type(type=WTPerson, self=Metadata扫描.Metadata) at Metadata.swift:49:22 frame #9: 0x0000000100b4390c Metadata扫描ClassType.build(self=0x00006000022f45a0) at ClassType.swift:21:28 frame #10: 0x0000000100b561a2 Metadata扫描BaseType.init(name="Student", type=Metadata扫描.Student, kind=class, self=0x00006000022f45a0) at BaseType.swift:22:9 frame #11: 0x0000000100b6282e Metadata扫描ModelType.init(name="Student", type=Metadata扫描.Student, kind=class) at :0 frame #12: 0x0000000100b44b3b Metadata扫描ClassType.init(name="Student", type=Metadata扫描.Student, kind=class) at <compiler-generated>:0 frame #13: 0x0000000100b449bc Metadata扫描ClassType.__allocatinginit(name:type:kind:) at ClassType.swift:0 frame #14: 0x0000000100b72c9d Metadata扫描static Metadata.type(type=Metadata扫描.Student, self=Metadata扫描.Metadata) at Metadata.swift:49:22 frame #15: 0x0000000100b57001 Metadata扫描AppDelegate.application(application=0x00007f8ffdf04e80, launchOptions=nil, self=0x00006000010f37c0) at AppDelegate.swift:20:27 frame #16: 0x0000000100b57183 Metadata扫描`@objc AppDelegate.application(:didFinishLaunchingWithOptions:) at :0

[czeludzki]

我也遇到了同样的问题... 这里需要父类也遵循 Convertible 协议才能可以哦 我的解决办法是, 不用kakajson解析, 甚至是遇到nsobject的对象, 都用mjextension

[wolfcon]

如果要使用 MJExtension 也已经给出了针对 Swift 的示例代码, 可以参考.