Question

- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName 
  namespaceURI:(NSString *)namespaceURI 
 qualifiedName:(NSString *)qName 
    attributes:(NSDictionary  *)attributeDict{

    //currentElenet is NSString
    currentElement = [elementName copy];

    if ([elementName isEqualToString:@"struct"]) {      

        self.post = [[Question alloc] init];

    }
}

- (void)parser:(NSXMLParser  *)parser foundCharacters:(NSString  *)string{

    if ([currentElement isEqualToString:@"string"]) {
        post.text = [NSString stringWithFormat:@"%@ %@", post.text, string];
    }
}

-(void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName
 namespaceURI:(NSString *)namespaceURI 
qualifiedName:(NSString *)qName{

    if ([elementName isEqualToString:@"struct"]) {

        [conversations addObject:post];
        [post release];
        post = nil;
    }
}

//Question.m file
 @synthesize text

-(id)init{

    self = [super init];
    if (self == nil) {

    }
    else {
            //declared as retain in .h file
        text = [[NSString alloc]initWithString:@""];
    }
    return self;
}

-(void)dealloc{
    [super dealloc];
    [title release];
}

你们有没有看到任何内存泄漏？我调用NSXML委托方法，它基本上将一个“问题”实例放入NSMutableArray。我检查了仪器，解析时发生了内存泄漏。但我不明白为什么......

Answer 1

currentElement = [elementName copy];

请阅读文档中的copy API说明。在那里提到

this method retains the new object before returning it. The invoker of the method, however, is responsible for releasing the returned object.

Answer 2

您确实需要包含属性声明，以便人们能够确定地回答内存管理问题（因为属性定义了内存的管理方式），但假设所有retain属性：

currentElement似乎永远不会被释放
text似乎永远不会被释放
self.post被分配了[[Question alloc] init]的结果。该方法的结果已经是您拥有的对象，post setter会再次保留它。它应该在方法退出之前释放，顺序如下：
```
id question = [[Question alloc] init];
self.post = question;
[question release];
```
（它也应该在dealloc中发布，或者当你完成它以平衡设定者时）

Answer 3

currentElement ---没有在解析流程中发布...其余代码看起来正确

目标C，内存泄漏？

3 个答案: