我开发了下一个代码,用于将NSMutableString对象转换为NSData对象:
-(NSData *)desSerializarFirma:(NSMutableString *)firma{
NSArray *arregloBits = [firma componentsSeparatedByString:@","];
unsigned c = arregloBits.count;
uint8_t *bytes = malloc(sizeof(*bytes) * c);
unsigned i;
for (i = 0; i < c; i ++)
{
NSString *str = [arregloBits objectAtIndex:i];
int byte = [str intValue];
bytes[i] = (uint8_t)byte;
}
return [NSData dataWithBytes:bytes length:c];
}
当我用xCode分析它时说
memory is never released; potential leak of memory pointed to by 'bytes'
此语句指向我的代码的最后一行:
return [NSData dataWithBytes:bytes length:c];
如果我通过执行'free(bytes)'释放对象,那么我的函数将变得无用……任何帮助,我将不胜感激
您需要free
个字节,因为NSData
不拥有它的所有权:它不知道该数组是临时的还是动态的,因此它对其进行了复制。
要解决此问题,请替换
return [NSData dataWithBytes:bytes length:c];
with
NSData *res = [NSData dataWithBytes:bytes length:c];
free(bytes);
return res;
替换
return [NSData dataWithBytes:bytes length:c];
with
return [NSData dataWithBytesNoCopy:bytes length:c];
然后,NSData
会获得字节的所有权,并将为您释放它们。