iPhone荒謬的內存泄漏

Question

我一直卡在我的iPhone應用程序的內存泄漏問題現在很好。我覺得我必須錯誤地閱讀我的數據。似乎每當我分配內存的時候，有太多開銷導致泄漏，當我釋放數據時，內存使用量幾乎沒有下降或根本沒有下降。一個已經浪費了2天是我的flipside視圖控制器上的UIWebview加載一個url，我的應用程序的內存使用從3 MB跳到7.我在我的dealloc方法中釋放webview，但巨大的內存塊仍然存在。有沒有人有任何建議。

- (void)viewDidLoad { 
self.view.backgroundColor = [UIColor viewFlipsideBackgroundColor]; 

nav_bar = [[UINavigationBar alloc] initWithFrame:CGRectMake(0,0,self.view.frame.size.width+20,45)]; 
[self.view addSubview:nav_bar]; 
[UINavigationBar release]; 

rightButton = [[UIBarButtonItem alloc] initWithTitle:@"Done" style:UIBarButtonItemStyleDone target:self action:@selector(done)]; 
item = [[UINavigationItem alloc] initWithTitle:@"Flipside View"]; 
item.rightBarButtonItem = rightButton; 
item.hidesBackButton = YES; 
[nav_bar pushNavigationItem:item animated:NO]; 
[rightButton release]; 
[item release]; 

NSAutoreleasePool *initPool = [[NSAutoreleasePool alloc] init]; 

web_view = [[UIWebView alloc]initWithFrame:CGRectMake(0,45,self.view.frame.size.width,self.view.frame.size.height - 45)]; 

web_view.autoresizesSubviews = YES; 
web_view.autoresizingMask=(UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth); 

NSString *urlAddress = @"http://www.tutorialpark.com/wpcontent/uploads/3/HeartBlending.jpg"; 
NSURL *url = [NSURL URLWithString:urlAddress]; 
NSURLRequest *requestObj = [NSURLRequest requestWithURL:url]; 

[web_view loadRequest:requestObj]; 
[self.view addSubview:web_view]; 
[web_view release]; 
[initPool release]; 

[super viewDidLoad]; 
} 

- (void)dealloc { 
    [nav_bar removeFromSuperview]; 
    [web_view removeFromSuperview]; 
    [rightButton release]; 
    [super dealloc]; 
} 

我對縮進表示歉意我非常生氣，不想處理它。

Answer 1

[UINavigationBar release]; - 這是幹什麼的？它是否意味着[nav_bar發佈]？ - 如果是這樣的話，稍後應該稍微再往下訪問nav_bar。但那麼它似乎是一個成員變量？所以它應該在dealloc中發佈。

rightButton正在釋放兩次 - 一次在viewDidLoad中，一次在dealloc中。

你能解釋一下自動發佈池的用途嗎？

Answer 2

您似乎對引用計數的工作方式感到困惑。下面

看評論：

- (void)viewDidLoad { 
    self.view.backgroundColor = [UIColor viewFlipsideBackgroundColor]; 

    UINavigationBar* nav_bar = [[UINavigationBar alloc] initWithFrame:CGRectMake(0,0,self.view.frame.size.width+20,45)]; 
    // nav_bar retaincount 1 
    [self.view addSubview:nav_bar]; 
    // nav_bar retaincount 2 
    [nav_bar release]; 
    // nav_bar retaincount 1 - now controlled by self.view 

    UIBarButtonItem* rightButton = [[UIBarButtonItem alloc] initWithTitle:@"Done" style:UIBarButtonItemStyleDone target:self action:@selector(done)]; 
    // rightButton retaincount 1 

    UINavigationItem* item = [[UINavigationItem alloc] initWithTitle:@"Flipside View"]; 
    // item retaincount 1 

    item.rightBarButtonItem = rightButton; 
    // rightButton retaincount 2 

    [rightButton release]; 
    // rightButton retaincount 1 - now controlled by item 

    item.hidesBackButton = YES; 
    [nav_bar pushNavigationItem:item animated:NO]; 
    // item retaincount 2 

    [item release]; 
    // item retaincount 1 - now controlled by nav_bar 

    UIWebView* web_view = [[UIWebView alloc]initWithFrame:CGRectMake(0,45,self.view.frame.size.width,self.view.frame.size.height - 45)]; 
    // web_view retaincount 1 

    web_view.autoresizesSubviews = YES; 
    web_view.autoresizingMask=(UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth); 

    NSString *urlAddress = @"http://www.tutorialpark.com/wpcontent/uploads/3/HeartBlending.jpg"; 

    NSURL *url = [NSURL URLWithString:urlAddress]; 
    // url is autoreleased, you can ignore.. 

    NSURLRequest *requestObj = [NSURLRequest requestWithURL:url]; 
    // requestObj is autoreleased, you can ignore.. 

    [web_view loadRequest:requestObj]; 

    [self.view addSubview:web_view]; 
    // web_view retaincount 2 

    [web_view release]; 
    // web_view retaincount 1 - now controlled by self.view 

    [super viewDidLoad]; 
} 

- (void)dealloc { 
    // don't need to do anything because all the memory is controlled by self.view, will be released when the internal variable self.view is released. 
    [super dealloc]; 
}