我正在努力修复我所做的辅助函数中的内存泄漏。辅助函数采用
的结果+ (id)JSONObjectWithData:(NSData *)data options:(NSJSONReadingOptions)opt error:(NSError * _Nullable *)error
并将所有叶元素转换为NSStrings(如果它们是NSNumber)。
以下是方法:
-(NSArray *) stringisizeObjects:(NSArray *)inputArray{
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
NSMutableArray *mutable = [[NSMutableArray alloc] initWithCapacity:[inputArray count]];
for (int i = 0; i < [inputArray count]; i++) {
NSArray *keys = [inputArray[i] allKeys];
NSMutableDictionary *addDictionary = [[NSMutableDictionary alloc] initWithCapacity:[keys count]];
for (int j = 0; j < [keys count]; j++) {
id theObject = [[inputArray[i] objectForKey:keys[j]]autorelease];
if ([theObject isKindOfClass:[NSNumber class]]) {
[addDictionary setObject:[theObject stringValue] forKey:keys[j]];
[theObject release];
}else if ([theObject isKindOfClass:[NSString class]]){
[addDictionary setObject:[inputArray[i] objectForKey:keys[j]] forKey:keys[j]];
}
}
[mutable addObject:addDictionary];
}
NSArray *returnArray = [mutable copy];
[mutable removeAllObjects];
[mutable release];
[pool drain];
return returnArray;
}
以下是我获取输入数组的方法。
id parsedThingy = [NSJSONSerialization JSONObjectWithData:resultJSONData options:1 error:&jsonDecodeError];
在我将结果传递给我的stringisize方法之前,我必须确保我有一个带有匹配键的NSDrary NSArray。
NSArray *resultArray = [self stringisizeObjects:parsedThingy];
X-Code内存泄漏工具指出我这个方法是我问题的原因。
正如您所看到的,我已尝试将内容包装在自动释放池中,自动释放和释放。我只是没有看到前进的方向。
这是一个全天候运行的非ARC项目。
编辑:我接受了Droppy的建议并尝试使用mutableCopy重新编写该方法。泄漏仍在那里。在这一点上,我唯一的工作可能是改变JSON的源只发送字符串。 :(
-(NSArray *) stringisizeObjects2:(NSArray *)inputArray{
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
NSMutableArray *mutableArray = [inputArray mutableCopy];
for (int i = 0; i < [mutableArray count]; i++) {
NSMutableDictionary *mutableDict = [mutableArray[i] mutableCopy];
NSArray *keys = [mutableDict allKeys];
for (int j = 0; j < [keys count]; j++) {
if ([[mutableDict objectForKey:keys[j]] isKindOfClass:[NSNumber class]]) {
NSString *stringValue = [[mutableDict objectForKey:keys[j]] stringValue];
[mutableDict removeObjectForKey:keys[j]];
[mutableDict setObject:stringValue forKey:keys[j]];
}
}
mutableArray[i] = [mutableDict copy];
[mutableDict release];
}
NSArray *returnArray = [mutableArray copy];
[mutableArray release];
[pool drain];
return returnArray;
}
答案 0 :(得分:1)
问题:
addDictionary
致电alloc
但未致电release
或autorelease
autorelease
id theObject = [inputArray[i] objectForKey:keys[j]];
//不需要自动释放或释放您不拥有的对象溶液:
-(NSArray *) stringisizeObjects:(NSArray *)inputArray{
NSMutableArray *mutable = [[NSMutableArray alloc] initWithCapacity:[inputArray count]];
for (int i = 0; i < [inputArray count]; i++) {
NSArray *keys = [inputArray[i] allKeys];
NSMutableDictionary *addDictionary = [[NSMutableDictionary alloc] initWithCapacity:[keys count]];
for (int j = 0; j < [keys count]; j++) {
id theObject = [inputArray[i] objectForKey:keys[j]]; // not need autorelease
if ([theObject isKindOfClass:[NSNumber class]]) {
[addDictionary setObject:[theObject stringValue] forKey:keys[j]];
//[theObject release]; // not need release value here
}else if ([theObject isKindOfClass:[NSString class]]){
[addDictionary setObject:[inputArray[i] objectForKey:keys[j]] forKey:keys[j]];
}
}
[mutable addObject:addDictionary];
[addDictionary release]; // release after not use
}
NSArray *returnArray = [[[NSArray alloc] initWithArray:mutable] autorelease]; // auto release for return value
[mutable removeAllObjects];
[mutable release];
return returnArray;
}