在使用仪器进行分析时，main.m中的内存泄漏？

Question

在我的应用程序中，我在UIKit，UIFoundation和QuartzCore中出现内存泄漏。当我去呼叫树时，它显示main.m中的泄漏。我真的没有任何线索为什么会发生这种情况。您可以在下面看到内存泄漏的屏幕截图。

在通话树中

如何解决此漏洞？

内存泄漏代码

- (void) showCustomPrices
{

int priceValue = 0;
NSArray* priceSplitValue = [btnpriceButton.titleLabel.text componentsSeparatedByString: @"."];
NSString* priceFinal = [priceSplitValue objectAtIndex:0];

for(int i=0;i<[priceArray count];i++)
{ 
    if([[priceArray objectAtIndex:i] isEqualToString:priceFinal]){
        priceValue = i; 
    }
}


    //Assign the cocktail to picker view
    priceActionsheet = [[UIActionSheet alloc] initWithTitle:nil
                                              delegate:self
                                     cancelButtonTitle:nil
                                destructiveButtonTitle:nil
                                     otherButtonTitles:nil];//as we want to display a subview we won't be using the default buttons but rather we're need to create a toolbar to display the buttons on

    [priceActionsheet setActionSheetStyle:UIActionSheetStyleBlackTranslucent];

    CGRect pickerFrame = CGRectMake(0, 40, 0, 0);

    pricePickerview = [[UIPickerView alloc] initWithFrame:pickerFrame];
    pricePickerview.showsSelectionIndicator = YES;
    pricePickerview.dataSource = self;
    pricePickerview.delegate = self;


    [priceActionsheet addSubview:pricePickerview];
    //[pickerView release];

    priceToolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, 485, 44)];
    priceToolbar.barStyle = UIBarStyleBlackTranslucent;
    [priceToolbar sizeToFit];

    NSMutableArray *barItems = [[NSMutableArray alloc] init];

    UIBarButtonItem *flexSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:self action:nil];
    [barItems addObject:flexSpace];

    UIBarButtonItem *doneBtn = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(doneButtonPressed:)];
    [barItems addObject:doneBtn];

    UIBarButtonItem *cancelBtn = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCancel target:self action:@selector(cancelButtonPressed:)];
    [barItems addObject:cancelBtn];

    [pricePickerview selectRow:priceValue inComponent:0 animated:YES];//Memory leaks shows 100% here

    [priceToolbar setItems:barItems animated:YES];

    [priceActionsheet addSubview:priceToolbar];

    [priceActionsheet addSubview:pricePickerview];

    [priceActionsheet showInView:self.view];  

    [priceActionsheet setBounds:CGRectMake(0, 0, 485, 320)];

}

非常感谢任何帮助。

Answer 1

如果您的项目不是ARC，可能是因为您已将[super dealloc];留在某处继承基础类。我对NSObject的子类有同样的问题。我忘了写[super dealloc];并得到了一些类似的泄漏。

Answer 2

最后，我通过将方法allocation/initialisation中的选择器视图showCustomePrices部分移动到viewwillAppear来解决了我的问题。哪个工作真棒，没有任何内存泄漏。

之前发生的事情是每当我点击按钮时，它会弹出pickerview内存分配。这就是发生内存泄漏的原因。

现在进入viewwillAppear后，它只是在视图加载时第一次分配。然后在没有任何内存分配的情况下访问Picker View。因此消除了内存泄漏。

Answer 3

NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
    int retVal = UIApplicationMain(argc, argv, nil, nil);
    [pool release];
    return retVal;

在你的main.m中试试这个

Answer 4

int main(int argc, char *argv[])
{
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
    int retVal = UIApplicationMain(argc, argv, @"yourAppName", nil);
    [pool release];
    return retVal;
}