我在使用iOS 3.0模拟器时遇到此错误，但在3.1.3和3.2模拟器上没有。
在malloc_error_break上创建符号断点后，我在日志中看到了这一点：
[Session started at 2010-02-13 19:15:22 +0700.]
2010-02-13 19:15:24.405 iPortals[21656:207] bool for 1
iPortals(21656,0xa0089500) malloc: *** error for object 0x285e000: pointer being freed was not allocated
*** set a breakpoint in malloc_error_break to debug
iPortals(21656,0xa0089500) malloc: *** error for object 0x2850000: pointer being freed was not allocated
*** set a breakpoint in malloc_error_break to debug
iPortals(21656,0xa0089500) malloc: *** error for object 0x286c000: pointer being freed was not allocated
*** set a breakpoint in malloc_error_break to debug
iPortals(21656,0xa0089500) malloc: *** error for object 0x287c000: pointer being freed was not allocated
*** set a breakpoint in malloc_error_break to debug
这是我的代码
@implementation WebViewController
@synthesize myWebView;
@synthesize AppDelegate;
@synthesize mybanner;
@synthesize request;
- (void)dealloc
{
//NSLog(@"WebViewController has been dealloc");
myWebView.delegate = nil;
self.myWebView = nil;
[self.myWebView release];
[super setView:nil];
[myWebView release];
myWebView = nil;
request = nil;
[mybanner release];
[super dealloc];
}
- (void)setView:(UIView *)aView
{
//NSLog(@"setView:(UIView *)aView");
if (aView == nil) {
self.myWebView = nil;
}
[super setView:aView];
}
- (void)action {
AppDelegate = nil;
AppDelegate = [[UIApplication sharedApplication] delegate];
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:AppDelegate.PushLink]];
}
- (void)didReceiveMemoryWarning {
//NSLog(@"didReceiveMemoryWarning: view = %@, superview = %@", [self valueForKey:@"_view"], [[self valueForKey:@"_view"] superview]);
[super didReceiveMemoryWarning]; // Releases the view if it doesn't have a superview
// Release anything that's not essential, such as cached data
[[NSURLCache sharedURLCache] removeAllCachedResponses];
}
- (void)viewDidLoad
{
[super viewDidLoad];
//NSLog(@"viewDidLoad: view = %@", self.view);
self.title = NSLocalizedString(@"iPortals", @"");
//UIBarButtonItem *customItem = [[UIBarButtonItem alloc] initWithTitle:@"Item" style:UIBarButtonItemStyleBordered target:self action:@selector(action];
//self.navigationController.toolbar setItems: = [[UIBarButtonItem alloc] initWithTitle:@"[...]" style:UIBarButtonItemStyleBordered target:self action:@selector(action)];
/*
UIBarButtonItem *emailButton = [[UIBarButtonItem alloc]
initWithImage:[UIImage imageNamed:@"icon.png"]
style:UIBarButtonItemStylePlain target:self
action:@selector(action)];
self.toolbarItems = [NSArray arrayWithObjects:emailButton, nil];
[emailButton release];
//*/
AppDelegate = nil;
AppDelegate = [[UIApplication sharedApplication] delegate];
//NSLog(@"777777777 %@",AppDelegate.PushLink);
/*
CGRect webFrame = [[UIScreen mainScreen] applicationFrame];
webFrame.origin.y += kTopMargin + 5.0; // leave from the URL input field and its label
webFrame.size.height = 400;
//webFrame.size.height -= 40.0;
self.myWebView = nil;
//*/
//self.myWebView = [[[UIWebView alloc] initWithFrame:webFrame] autorelease];
self.myWebView.backgroundColor = [UIColor grayColor];
self.myWebView.scalesPageToFit = YES;
self.myWebView.autoresizingMask = (UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight);
self.myWebView.delegate = self;
[self.view addSubview: self.myWebView];
self.mybanner.backgroundColor = [UIColor clearColor];
[self.view addSubview: self.mybanner];
/*
CGRect textFieldFrame = CGRectMake(kLeftMargin, kTweenMargin,
self.view.bounds.size.width - (kLeftMargin * 2.0), kTextFieldHeight);
UITextField *urlField = [[UITextField alloc] initWithFrame:textFieldFrame];
urlField.borderStyle = UITextBorderStyleBezel;
urlField.textColor = [UIColor blackColor];
urlField.delegate = self;
urlField.placeholder = @"<enter a URL>";
urlField.text = AppDelegate.PushLink;
urlField.backgroundColor = [UIColor whiteColor];
urlField.autoresizingMask = UIViewAutoresizingFlexibleWidth;
urlField.returnKeyType = UIReturnKeyGo;
urlField.keyboardType = UIKeyboardTypeURL; // this makes the keyboard more friendly for typing URLs
urlField.autocapitalizationType = UITextAutocapitalizationTypeNone; // don't capitalize
urlField.autocorrectionType = UITextAutocorrectionTypeNo; // we don't like autocompletion while typing
urlField.clearButtonMode = UITextFieldViewModeAlways;
[urlField setAccessibilityLabel:NSLocalizedString(@"URLTextField", @"")];
[self.view addSubview:urlField];
[urlField release];
*/
request = nil;
request = [NSURLRequest requestWithURL:[NSURL URLWithString:AppDelegate.PushLink]
cachePolicy:NSURLRequestUseProtocolCachePolicy
timeoutInterval:60.0];
[self.myWebView loadRequest:request];
}
// called after the view controller's view is released and set to nil.
// For example, a memory warning which causes the view to be purged. Not invoked as a result of -dealloc.
// So release any properties that are loaded in viewDidLoad or can be recreated lazily.
//
- (void)viewDidUnload
{
[super viewDidUnload];
// release and set to nil
[self.myWebView release];
self.myWebView = nil;
}
-(BOOL)canBecomeFirstResponder {
//NSLog(@"canBecomeFirstResponder ");
return YES;
}
-(void)viewDidAppear:(BOOL)animated {
//NSLog(@"viewDidAppear ");
[self becomeFirstResponder];
}
- (void)motionBegan:(UIEventSubtype)motion withEvent:(UIEvent *)event {
//NSLog(@"overrideoverrideoverrideoverrideoverrideoverrideoverrideoverride ");
if ( event.subtype == UIEventSubtypeMotionShake )
{
// Put in code here to handle shake
AppDelegate = nil;
AppDelegate = [[UIApplication sharedApplication] delegate];
[AppDelegate ToggleNavigationBar];
[AppDelegate playsound:1];
[self setAdHide:AppDelegate.toggle];
}
}
- (void)setAdHide:(BOOL)hide {
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.6];
if (!hide) {
if (current == UIInterfaceOrientationLandscapeLeft || current == UIInterfaceOrientationLandscapeRight) {
[mybanner setFrame:CGRectMake(0, 272, mybanner.frame.size.width, mybanner.frame.size.height)];
}
else {
[mybanner setFrame:CGRectMake(0, 432, mybanner.frame.size.width, mybanner.frame.size.height)];
}
}
else {
[self restoreAd];
}
[UIView commitAnimations];
}
- (void)restoreAd {
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.6];
[mybanner setFrame:CGRectMake(0, 0, mybanner.frame.size.width, mybanner.frame.size.height)];
[UIView commitAnimations];
}
#pragma mark -
#pragma mark UIViewController delegate methods
- (void)viewWillAppear:(BOOL)animated
{
self.myWebView.delegate = nil;
self.myWebView.delegate = self; // setup the delegate as the web view is shown
}
- (void)viewWillDisappear:(BOOL)animated
{
//[self.myWebView removeFromSuperview];
[self.myWebView stopLoading]; // in case the web view is still loading its content
self.myWebView.delegate = nil; // disconnect the delegate as the webview is hidden
[UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
current = interfaceOrientation;
[self restoreAd];
return ((interfaceOrientation == UIInterfaceOrientationLandscapeLeft) || (interfaceOrientation == UIDeviceOrientationPortrait) ||
(interfaceOrientation == UIInterfaceOrientationLandscapeRight));
}
// this helps dismiss the keyboard when the "Done" button is clicked
- (BOOL)textFieldShouldReturn:(UITextField *)textField
{
[textField resignFirstResponder];
[self.myWebView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:[textField text]]]];
return YES;
}
#pragma mark -
#pragma mark UIWebViewDelegate
- (void)webViewDidStartLoad:(UIWebView *)webView
{
// starting the load, show the activity indicator in the status bar
[UIApplication sharedApplication].networkActivityIndicatorVisible = YES;
}
- (void)webViewDidFinishLoad:(UIWebView *)webView
{
// finished loading, hide the activity indicator in the status bar
[UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
}
- (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error
{
// load error, hide the activity indicator in the status bar
[UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
// report the error inside the webview
//NSString* errorString = [NSString stringWithFormat:
// @"<html><center><font size=+5 color='red'>An error occurred:<br>%@</font></center></html>",
// error.localizedDescription];
//[self.myWebView loadHTMLString:errorString baseURL:nil];
//URLCacheAlertWithError(error);
}
@end
答案 0 :(得分：4)
按照日志消息中的建议：在malloc_error_break中设置断点。当断点触发时，查看Xcode中的回溯（或使用gdb命令行上的bt命令）并查看您在哪里调用free或使用free的API
使用Xcode静态分析器有时可以发现内存使用问题 - 从Xcode构建菜单中选择“Build and Analyze”。
答案 1 :(得分：4)
你似乎一再试图解除你的指针。在dealloc方法中只调用[blah release];并在viewDidUnload方法中为指针指定一个nil值。两种方法都不要同时做。
- (void)dealloc
{
[self.myWebView release];
[mybanner release];
[super dealloc];
}
- (void)viewDidUnload
{
[super viewDidUnload];
self.myWebView = nil;
}
你似乎也缺少一些变量。
答案 2 :(得分：1)
这似乎完全不相关，但是有类似的错误，对我有用的是修复磁盘权限。
我从Mac Terminal - 'pointer being freed was not allocated' error when opening terminal
得到了这个建议另外，我意识到这个问题已经有6年了，所以它对原来的提问者来说不太可能有用。我希望这个答案可以帮助其他有类似错误的人。
答案 3 :(得分：0)
令人惊讶的是，为我解决的问题是关闭并重新启动调试设备。哦，Apple ......