Common block 56, 1024, 8, 244, 24 Memory leaks using UIWebView loadRequest

Question

I am having memory leaks that I cannot understand due to leaks, assembly / analysis or a general inspection of how to repair. I have a very strong idea that this is due to the loadRequest command from my UIWebview loading javascript, but I cannot figure out what is wrong.

Here is my setup:

I have a tabbarcontroller that I programmatically create with 4 view controllers: a table view, mapview, another table view, and webview, respectively.

• The first view of the table displays static data.
• mapview shows annotations that, when clicked, fill the fourth tab variable, webview, and switch to webview to display a locally saved html / javascript file, which is a 3d model.
• The 2nd table is a list of all the same information, each annotation in mapview is just a table. it has the same functionality in terms of filling in a variable, switching and displaying an html / javascript file in webview
• webview displays the downloaded html / javascript file if it does not show UIAlertView to select it from mapview or list

loadRequest() webview, . , 3d- (.. , , x, -, , y ( x ) ​​-). ipad, . : General-Block 56, 1024, 8, 244 24 , .

webview, loadrequest loadrequest request = nil, , url, ( google.com, javascript), .

:

• [self.webView loadRequest: nil];
• [self.webView loadHTMLString: @"" baseURL: nil];
• [self.webView stopLoading];

viewWillDisappear webViewController, - , , , . loadRequest, .

• fyi, xcode 4.0.2, ipad , 4.3.2
• , ( ), , , - , javascript
• html javascript, . , cfnetwork/http, , .

, mapView, loadModel webViewController:

- (void) mapCallOutPressed: (UIView *) sender {

NSInteger selectedIndex = sender.tag;
MyLocation *selectedObject = [_mapView.annotations objectAtIndex:selectedIndex];

MyModel *model = selectedObject.model;

NSLog(@"Model selected from mapview = %@", model.description);

// Get reference to the webview from the tabBarController (viewController index=3)
WebViewController *webViewController = [self.tabBarController.viewControllers objectAtIndex:3];
webViewController.model = model;

[webViewController loadModel];

    // Switch tabs to the webView
self.tabBarController.selectedIndex = 3;
[self.tabBarController.selectedViewController viewDidAppear:YES];

webViewController.h .m:

WebViewController.h:

WebViewController : UIViewController <UIWebViewDelegate> {

UIWebView *webView;
NSString *templateRunFilePath;
MyModel *model;
NSString *templateRunTitle;

@property (nonatomic, retain) UIWebView *webView;
@property (assign) MyModel *model;
@property (nonatomic, copy) NSString *templateRunFilePath;
@property (nonatomic, copy) NSString *templateRunTitle;

-(void) loadModel;

WebViewController.m:

- (void) viewDidLoad {
[super viewDidLoad];
NSLog(@"in webview did load");

self.webView = [[UIWebView alloc] initWithFrame:CGRectMake(0, 0, self.view.bounds.size.width, self.view.bounds.size.height)];
self.webView.delegate = self;

self.webView.autoresizingMask=(UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth);
self.webView.scalesPageToFit = YES;

[self.view addSubview:self.webView];

}


- (void) viewWillAppear:(BOOL)animated {

if (self.model) {        
    self.tabBarController.navigationItem.title = [NSString stringWithFormat: @"%@ - %@", self.tabBarController.navigationItem.title, self.model.description];

}
else {
    UIAlertView *msg = [[UIAlertView alloc] initWithTitle:@"No Model Selected" 
                                                  message:@"Please select a model from the map or list tab to view." 
                                                 delegate:nil 
                                        cancelButtonTitle:@"OK" 
                                        otherButtonTitles:nil];
    [msg show];
    [msg release];
}
}

- (void) loadModel {

NSString *localURLPath = [NSString stringWithFormat:@"%@/%@/%@", self.templateRunFilePath, self.model.folderName, self.model.modelFileName];

NSURL *url = [NSURL fileURLWithPath:localURLPath];
NSURLRequest *requestObj = [NSURLRequest requestWithURL: url];
[self.webView loadRequest:requestObj];
}


- (void)webViewDidFinishLoad:(UIWebView *)webView {   

[[NSUserDefaults standardUserDefaults] setInteger:0 forKey:@"WebKitCacheModelPreferenceKey"];
}


-(void)viewWillDisappear:(BOOL)animated {
NSLog(@"webview view will disappear");

[super viewWillDisappear:animated];

//[self.webView loadRequest:nil];
//[self.webView loadHTMLString:@"" baseURL:nil];

 self.webView.delegate = nil;
 }


- (void)dealloc {
    self.webView.delegate = nil;
[self.webView release];

[super dealloc];
}

- , . < 1 , , , .

!

-Mike

Answer 1

, , ?

- (void) loadModel {

[self.webView loadHTMLString:@"" baseURL:nil]; // here you are loading... or you have tried with commenting it also?

NSString *localURLPath = [NSString stringWithFormat:@"%@/%@/%@", self.templateRunFilePath, self.model.folderName, self.model.modelFileName];

NSURL *url = [NSURL fileURLWithPath:localURLPath];
NSURLRequest *requestObj = [NSURLRequest requestWithURL: url];
[self.webView loadRequest:requestObj];   // again here you are also loading?
}