释放NSMutableArray？

Question

我无法弄清楚我在做什么错了一个NSMustableArray。公平地说，我不太了解内存分配情况，所以我很抱歉，如果这是一个简单的问题。

我有一个标签栏应用程序运行良好，并且在其中一个标签栏上有一个人的前视图和后视图。

在.H我

@interface BurnsCalculatorViewController : UIViewController// <UIPickerViewDelegate, UIPickerViewDataSource> 
{ 
    UIView    *frontView; 
    UIView    *backView; 
    UIButton   *frontButton; 
    UIButton   *backButton; 
    NSMutableArray  *frontBurnsArray; 
} 

@property (nonatomic, retain) UIView   *frontView; 
@property (nonatomic, retain) UIView   *backView; 
@property (nonatomic, retain) UIButton   *frontButton; 
@property (nonatomic, retain) UIButton   *backButton; 
@property (nonatomic, retain) NSMutableArray *frontBurnsArray; 

-(IBAction)frontButtonSelect:(id)sender; 
-(IBAction)backButtonSelect:(id)sender; 

@end 

然后，我有.m文件

@implementation BurnsCalculatorViewController 

@synthesize frontView; 
@synthesize backView; 
@synthesize frontButton; 
@synthesize backButton; 
@synthesize frontBurnsArray; 

-(IBAction)frontButtonSelect:(id)sender 
{ 
    [UIView beginAnimations:nil context:nil]; 
    [UIView setAnimationDuration:1.0]; 
[UIView setAnimationTransition:UIViewAnimationTransitionFlipFromLeft forView:[self view] cache:YES]; 
    [self.view addSubview:backView]; 
    [self.view addSubview:backButton]; 
[UIView commitAnimations]; 
    NSLog(@"%@", frontBurnsArray); 
} 

-(IBAction)backButtonSelect:(id)sender 
{ 
    [UIView beginAnimations:nil context:nil]; 
[UIView setAnimationDuration:1.0]; 
[UIView setAnimationTransition:UIViewAnimationTransitionFlipFromLeft forView:[self view] cache:YES]; 
    [self.view addSubview:frontView]; 
    [self.view addSubview:frontButton]; 
[UIView commitAnimations]; 
    NSLog(@"%@", frontBurnsArray); 
} 

-(void)viewDidLoad 
{ 
    frontBurnsArray = [NSMutableArray arrayWithObjects: @"frontHead", @"frontChest", @"frontAbdomen", @"frontGroin",@"frontLeftArm", @"frontLeftForeArm", @"frontRightArm", @"frontRightForearm", @"frontLeftThigh", @"frontLeftLowerLeg", @"frontRightThigh", @"frontRightLowerLeg",nil]; 

    CGRect viewframe = CGRectMake(0, 0, 320, 480); 
    frontView = [[UIView alloc] initWithFrame:viewframe]; 
    frontView.backgroundColor = [UIColor blueColor]; 
    [self.view addSubview:frontView]; 

    frontButton = [UIButton buttonWithType:UIButtonTypeRoundedRect]; 
    [frontButton addTarget:self action:@selector(frontButtonSelect:) forControlEvents:UIControlEventTouchDown]; 
    [frontButton setTitle:@"Show Back" forState:UIControlStateNormal]; 
    frontButton.frame = CGRectMake(210, 10, 100, 30); 
    [self.view addSubview:frontButton]; 

    backView = [[UIView alloc] initWithFrame:viewframe]; 
    backView.backgroundColor = [UIColor blackColor]; 
    backButton = [[UIButton buttonWithType:UIButtonTypeRoundedRect] retain]; 
    [backButton addTarget:self action:@selector(backButtonSelect:)forControlEvents:UIControlEventTouchDown]; 
    [backButton setTitle:@"Show Front" forState:UIControlStateNormal]; 
    backButton.frame = CGRectMake(210, 10, 100, 30); 
} 

-(void)dealloc 
{ 
    [super dealloc]; 
    [frontButton release]; 
    [backButton release]; 
    [frontBurnsArray release]; 
} 
@end 

我无法弄清楚究竟是为什么在IBActions的NSLogs都告诉我，该实例已被释放。除了dealloc中的“释放”之外，我已经说过保留这个数组并且没有在其他地方释放它。

我已经花了很多年寻找答案，但只是无法弄清楚。

谢谢！

Answer 1

frontBurnsArray = [NSMutableArray arrayWithObjects: @"frontHead", @"frontChest", @"frontAbdomen", @"frontGroin",@"frontLeftArm", @"frontLeftForeArm", @"frontRightArm", @"frontRightForearm", @"frontLeftThigh", @"frontLeftLowerLeg", @"frontRightThigh", @"frontRightLowerLeg",nil]; 

您没有使用保留财产

尝试

self.frontBurnsArray = [NSMutableArray arrayWithObjects: @"frontHead", 
                 @"frontChest", 
                 @"frontAbdomen", 
                 //.... 
                 nil]; 

要创建阵列，即autorealesed，这意味着它会消失在下次运行循环。如果将其分配给属性，它会自动保留并存在，直到您释放它。你也可以拨打

frontBurnsArray = [[NSMutableArray arrayWithObjects: @"frontHead", 
                 @"frontChest", 
                 @"frontAbdomen", 
                 //.... 
                 nil] retain];