我对 objective-c 不熟悉。
我不明白为什么我的函数无法正常工作,它会在函数返回时导致SIGBART错误。
+ (NSArray*) jsonToArray:(NSString*)jsonString
{
id mappedObj = nil;
RKObjectMappingProvider* mapProv = [[RKObjectMappingProvider alloc] init];
RKObjectMapping* answerMapping = [SMAnswersWrapper entityMappingForSerializer];
answerMapping.objectClass = [NSMutableDictionary class];
[mapProv setSerializationMapping:answerMapping forClass:[SMAnswersWrapper class]];
RKObjectMapping *proofsEntityMapping = [SMEntityArrayWrapper entityMappingWithContentMapping:answerMapping];
[mapProv setMapping:proofsEntityMapping forKeyPath:@""];
if (jsonString)
{
id obj = [jsonString objectFromJSONString];
if (obj)
{
RKObjectMapper* mapper = [[RKObjectMapper alloc] initWithObject:obj mappingProvider:mapProv];
RKObjectMappingResult* res = [mapper performMapping];
mappedObj = [res asCollection];
[mapper release];
}
}
[mapProv release];
return [[[mappedObj content] retain] autorelease];
}
错误位置在此行:
return [[[mappedObj content] retain] autorelease];
谢谢。
编辑
我发现我的错误,我无法访问我必须强制转换mapdObj的
[[[mappedObj content] retain] autorelease];
的内容。
最佳答案
尝试以下操作:
+ (NSArray*) jsonToArray:(NSString*)jsonString
{
id mappedObj = nil;
RKObjectMappingProvider* mapProv = [[RKObjectMappingProvider alloc] init];
RKObjectMapping* answerMapping = [SMAnswersWrapper entityMappingForSerializer];
answerMapping.objectClass = [NSMutableDictionary class];
[mapProv setSerializationMapping:answerMapping forClass:[SMAnswersWrapper class]];
RKObjectMapping *proofsEntityMapping = [SMEntityArrayWrapper entityMappingWithContentMapping:answerMapping];
[mapProv setMapping:proofsEntityMapping forKeyPath:@""];
if (jsonString)
{
id obj = [jsonString objectFromJSONString];
if (obj)
{
RKObjectMapper* mapper = [[RKObjectMapper alloc] initWithObject:obj mappingProvider:mapProv];
RKObjectMappingResult* res = [mapper performMapping];
mappedObj = [res asCollection];
[mapper release];
}
}
[mapProv release];
if (mappedObj)
{
return [[[mappedObj content] retain] autorelease];
}
return [NSArray array];
}
在您的代码中,如果
jsonString
或obj
为nil,则不会初始化mappingObj。这种情况可能会导致访问[mappedObj content]
时崩溃。试试这个,对您有帮助。
关于ios - 为什么返回函数会发出SIGABRT信号?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/30502355/