我的控制器代码 -

- (void)viewDidLoad {
     NSArray *firstArray;
     firstArray = [NSArray arrayWithObjects:    
                    [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"up0001" ofType:@"png"]],
                    [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"up0002" ofType:@"png"]],
                                      ::
                                      ::
                   [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"up0035" ofType:@"png"]], nil];


     imgView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 1024, 768)];

     imgView = UIViewContentModeScaleToFill;

     [imgView setAnimationImages:firstArray];

     imgView.animationDuration = 1.75;

     imgView.animationRepeatCount = 0;

     [imgView startAnimating];

     [self.view addSubview: imgView];
}
- (void)dealloc {
    [super dealloc];
    [imgView release]; 
    imgView = nil;
}

我正在通过获取appdelegate对象并在我的Appdelegate.m中调用以下appdelegate函数来将viewcontrollers更改为我的rootviewcontroller（请建议任何好的方法）

- (void)changeRootViewController:(NSString *)controllerName
{

    if(self.viewController){
        [self.viewController.view removeFromSuperview];
        self.viewController=nil;
    }

    if (controllerName == @"ViewController") {
        ViewController *lviewController =[[ViewController alloc] initWithNibName:@"ViewController" bundle:nil];
        self.viewController =  (RootViewController *)lviewController;
        [lviewController release];
        lviewController.view = nil;
        [self.window setRootViewController:self.viewController]; //LEAKS 100%
    } else if (controllerName == @"MainViewController") {
        // Use a different VC as roowViewController
        MainViewController *lviewController =[[MainViewController alloc] initWithNibName:@"MainViewController" bundle:nil];
        self.viewController =  (RootViewController *)lviewController;
        [lviewController release];
        lviewController.view = nil;
        [self.window setRootViewController:self.viewController]; //LEAKS 100%
    } else if (controllerName == @"SecondViewController") {
        // Use a different VC as roowViewController
        SecondViewController *lviewController =[[SecondViewController alloc] initWithNibName:@"SecondViewController" bundle:nil];
        self.viewController =  (RootViewController *)lviewController;
        [lviewController release];
        lviewController.view = nil;
        [self.window setRootViewController:self.viewController];  //LEAKS 100%
    }

    [self.window makeKeyAndVisible];
}

在我各自的控制器按钮中调用它按 -

AppDelegate *appDelegate = [[UIApplication sharedApplication] delegate];
[appDelegate changeRootViewController:@"ViewController"];

OR

 AppDelegate *appDelegate = [[UIApplication sharedApplication] delegate];
[appDelegate changeRootViewController:@"MainViewController"];

我想管理来自我的主控制器的视图控制器，无需使用Navigationbar即可进出控制器。请帮助我找出最佳方法并避免泄漏。

Answer 1

看看这段代码：


if (controllerName == @"ViewController") {
        ViewController *lviewController =[[ViewController alloc] initWithNibName:@"ViewController" bundle:nil];
        self.viewController =  (RootViewController *)lviewController;
        [lviewController release];
        lviewController.view = nil;
        [self.window setRootViewController:self.viewController]; //LEAKS 100%
    }

当你分配“lviewController”时，它的保留计数为1; 当你做“self.viewController”时，我认为viewController是一个保留属性，那么lviewController保留计数增加到2; 然后你释放它，平衡先前的alloc，并保持count返回1; 最后你将它分配给rootViewController，这是一个保留属性，所以lviewController再次保留计数为2; 最后当你在窗口中“交换”视图控制器时，lviewController被释放，因此它保持计数变为1.正如你所看到的，它永远不会被释放。这意味着每次调用此函数时，都会泄漏。

Answer 2

您需要在代码中更改一些语句..

这条线没有任何意义..

   imgView = UIViewContentModeScaleToFill;

使用一个函数，你必须在UIImageView文档中将UIViewContentModeScaleToFill属性的值设置为UIImageView。

[imageView setContentMode:UIViewContentModeScaleToFill];

与此相同......

lviewController.view = nil; //Remove this from your code ..

最后更改dealloc函数的implmentation并记住[super dealloc];应该是dealloc的任何实现中的最后一个。

- (void)dealloc {
    [imgView release]; 
    imgView = nil;
    [super dealloc];
}

Answer 3

可能的泄漏是由于“SecondViewController”，“MainViewController”，“ViewController”类中的代码造成的。崩溃的原因是您在[super dealloc]

之后发布了图像视图

试试这个，

- (void)dealloc {

     [imgView release]; 
     imgView = nil;
     [super dealloc];
 }

iOS内存泄漏导致更改视图控制器崩溃

我的控制器代码 -

3 个答案: