由于内存泄漏导致应用程序崩溃答案

【问题标题】：App crash due to memory leak由于内存泄漏导致应用程序崩溃
【发布时间】：2012-05-23 11:52:53
【问题描述】：

- (void)viewDidLoad {

    webCollectionOnScroller=[[NSMutableArray alloc] init];
    scroll = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 370, 320, 94)];
    scroll.pagingEnabled = YES;
    currentWeb=0;
    globali=0;
    firstTime=0;
    [loadingWeb startAnimating];
    alertForLoading = [[UIAlertView alloc] initWithTitle:@"Loading..." message:@"link is being loaded.\n Please wait!" delegate:self cancelButtonTitle:@"Back" otherButtonTitles:nil];
    [alertForLoading show];
    UIActivityIndicatorView *indicator = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];

    // Adjust the indicator so it is up a few pixels from the bottom of the alert
    indicator.center = CGPointMake(alertForLoading.bounds.size.width / 2, alertForLoading.bounds.size.height - 100);
    [indicator startAnimating];
    [alertForLoading addSubview:indicator];
    [NSThread detachNewThreadSelector:@selector(initializeParser)toTarget:self withObject:nil];
    [super viewDidLoad];
}

这是控制台错误“-[linksGallery respondsToSelector:]: message sent to deallocated instance 0x639a890 【切换到进程2211】 "

当我在主视图上评论发布声明时它不会崩溃

-(IBAction) goToLinks{
    linksGallery *showLinks=[[linksGallery alloc] initWithNibName:@"linksGallery" bundle:nil];
    [self.navigationController pushViewController:showLinks animated:YES];
        //[showLinks release];
}

【问题讨论】：

请提供更多信息！我哪条线崩溃了？ linksGallery 是什么？
更改这一行并检查 --> indicator.center = CGPointMake(100, 200);可能是您失去了对 alertForLoading 的参考。如果它不起作用，请评论 NSThread 行并检查。我希望 initializeParser 方法有问题。
崩溃不是由于“内存泄漏”，而是由于相反的原因——一个过早删除的对象。
您在使用 ARC 吗？检查是否存在应该强的弱属性。
类名应以大写字符开头。

标签： iphone ios

【解决方案1】：

先试试下面一行：

[super viewDidLoad];

在“dealloc()”函数内部：

[super dealloc];

在所有版本结束时。

希望这会对你有所帮助。

【讨论】：

【解决方案2】：

该错误消息意味着 linksGallery 的实例在您发送消息“respondsToSelector”时已被释放。要调试它，请尝试在释放它时将其设置为 null，这样它就不会崩溃，尽管它可能也不会执行您想要的操作。

【讨论】：

这正是我所说的。您正在释放一个对象，然后尝试使用它。

【解决方案3】：

试试下面的代码

-(IBAction) goToLinks{
    linksGallery *showLinks=[[linksGallery alloc] initWithNibName:@"linksGallery" bundle:nil];
    [self.navigationController pushViewController:[showLinks mutableCopy] animated:YES];
    [showLinks release];
}

或

-(IBAction) goToLinks{
    linksGallery *showLinks=[[[linksGallery alloc] initWithNibName:@"linksGallery" bundle:nil] autorelease];
    [self.navigationController pushViewController:showLinks animated:YES];
    //[showLinks release];
}

希望这会有所帮助

【讨论】：

【解决方案4】：

让你的 ViewDidLoad 看起来像这样：

- (void)viewDidLoad {

[super viewDidLoad];

webCollectionOnScroller=[[NSMutableArray alloc] init];
scroll = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 370, 320, 94)];
scroll.pagingEnabled = YES;
currentWeb=0;
globali=0;
firstTime=0;
[loadingWeb startAnimating];
alertForLoading = [[UIAlertView alloc] initWithTitle:@"Loading..." message:@"link is being loaded.\n Please wait!" delegate:self cancelButtonTitle:@"Back" otherButtonTitles:nil];
[alertForLoading show];
UIActivityIndicatorView *indicator = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];

// Adjust the indicator so it is up a few pixels from the bottom of the alert
indicator.center = CGPointMake(alertForLoading.bounds.size.width / 2, alertForLoading.bounds.size.height - 100);
[indicator startAnimating];
[alertForLoading addSubview:indicator];
[NSThread detachNewThreadSelector:@selector(initializeParser)toTarget:self withObject:nil];

}

【讨论】：