Question

我有这种情况，我想从视图中弹出并返回原始视图按下按钮后，应用程序崩溃，控制台显示EXC_BAD_ACCESS 我在启用了僵尸的乐器中运行它，这就是我得到的：link to image
dealloc called twice

如图所示，对同一个对象调用dealloc两次。
工具指向NSMutableArray，其中包含NSStrings。

任何人都可以帮我解决这个问题...... 谢谢。

ps：this question中提供的解决方案无法解决问题。

编辑：数组中填充了从xml文件解析的数据。

-(void) grabData{
    listOfNames=[[NSMutableArray alloc] init];


    NSString *XMLPath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:@"chi.xml"];
    NSData *XMLData   = [NSData dataWithContentsOfFile:XMLPath];
    CXMLDocument *rssParser = [[[CXMLDocument alloc] initWithData:XMLData options:0 error:nil] autorelease];

    NSArray *items = [rssParser nodesForXPath:@"/template/item" error:nil];
    for (CXMLElement *node in items) {
        int counter;
        if([[[node attributeForName:@"type"] stringValue] isEqualToString:@"label"]){
            for(counter = 0; counter < [node childCount]; counter++) {
                [listOfNames addObject:[[node childAtIndex:counter] stringValue]];
            }
        }
...

并用于此功能：

-(void)setupPage{
    [scroll setCanCancelContentTouches:NO];
    scroll.indicatorStyle=UIScrollViewIndicatorStyleWhite;
    scroll.clipsToBounds=YES;
    scroll.scrollEnabled=YES;
    scroll.pagingEnabled=NO;
    int y=Y;
    CGFloat cy=0;
    int count=[listOfProperties count];
    int total=count;
    for(int i=0;i<count;i++){
        NSString *class=[[[NSString alloc] initWithFormat:@"%@",[(NSObject *)[listOfProperties objectAtIndex:i] class]] autorelease];
        if([class isEqualToString:@"textFieldCell"]){
            ((textFieldCell*)[listOfProperties objectAtIndex:i]).str=[listOfNames objectAtIndex:i];
            [((textFieldCell*)[listOfProperties objectAtIndex:i]) setTarget:scroll];
            ((textFieldCell*)[listOfProperties objectAtIndex:i]).view.frame=CGRectMake(X,y,self.view.frame.size.width - remProfX,cellProfH);
            [((textFieldCell*)[listOfProperties objectAtIndex:i]) setImage:[self getImageName:i maxValue:(count-1)]];
            [scroll addSubview:((textFieldCell*)[listOfProperties objectAtIndex:i]).view];
        }
        else{
            if([class isEqualToString:@"comboBoxCell"]){
                ((comboBoxCell*)[listOfProperties objectAtIndex:i]).str=[listOfNames objectAtIndex:i];
                [((comboBoxCell*)[listOfProperties objectAtIndex:i]) setTarget:self.view];
                ((comboBoxCell*)[listOfProperties objectAtIndex:i]).view.frame=CGRectMake(X,y,self.view.frame.size.width - remProfX,cellProfH);
                [((comboBoxCell*)[listOfProperties objectAtIndex:i]) setImage:[self getImageName:i maxValue:(count-1)]];
                [scroll addSubview:((comboBoxCell*)[listOfProperties objectAtIndex:i]).view];
            }
            else{
                if([class isEqualToString:@"dateCell"]){
                    ((dateCell*)[listOfProperties objectAtIndex:i]).str=[listOfNames objectAtIndex:i];
                    [((dateCell*)[listOfProperties objectAtIndex:i]) setTarget:self.view];
                    ((dateCell*)[listOfProperties objectAtIndex:i]).view.frame=CGRectMake(X,y,self.view.frame.size.width - remProfX,cellProfH);
                    [((dateCell*)[listOfProperties objectAtIndex:i]) setImage:[self getImageName:i maxValue:(count-1)]];
                    [scroll addSubview:((dateCell*)[listOfProperties objectAtIndex:i]).view];
                }
            }
...

的dealloc：

- (void)dealloc {
    [listOfNames release];
    [listOfProperties release];
    [listOfGroupNames release];
    [listOfCheckBoxNames release];
    [listOfCheckBoxes release];
    [listOfButtons release];
    [scroll release];
    [super dealloc];
}

Answer 1

如果您使用以下方法之一将NSArray创建为自动释放对象，则可能会发生这种情况：

+ array
+ arrayWithArray:
+ arrayWithContentsOfFile:
+ arrayWithContentsOfURL:
+ arrayWithObject:
+ arrayWithObjects:
+ arrayWithObjects:count:

然后在关闭UIViewController的dealloc方法中释放这个数组。

修改顺便说一下，类字是重新设置的，就像你在这里使用它一样糟糕：

NSString *class=[[[NSString alloc] initWithFormat:@"%@",[(NSObject *)[listOfProperties objectAtIndex:i] class]] autorelease];

dealloc叫了两次

1 个答案: