在iOS 5中動態生成UIButton ARC導致釋放實例崩潰

Question

我有一個創建的類來生成UIButton，我將它添加到我的UIView中。這個偉大的工作，直到我轉換到昨天的弧線，不是我得到以下錯誤：

-[OrderTypeButton performSelector:withObject:withObject:]: message sent to deallocated instance 0x12449f70 

這裏是將按鈕添加到我UIView代碼（實際上是我的主要的UIView子視圖）：

OrderTypeButton *btn = [[OrderTypeButton alloc]initWithOrderType:@"All Orders" withOrderCount:[NSString stringWithFormat:@"%i",[self.ordersPlacedList count]] hasOpenOrder:NO]; 
btn.view.tag = 6969; 
btn.delegate = self; 
[btn.view setFrame:CGRectMake((col * width)+ colspacer, rowHeight + (row * height), frameWidth, frameHeight)]; 
[self.statsView addSubview:btn.view]; 

這裏是我的類的頭：

#import <UIKit/UIKit.h> 

@protocol OrderTypeButtonDelegate 
-(void) tapped:(id)sender withOrderType:(NSString*) orderType; 
@end 

@interface OrderTypeButton : UIViewController { 
    id<OrderTypeButtonDelegate> __unsafe_unretained delegate; 
    IBOutlet UILabel *lblOrderType; 
    IBOutlet UILabel *lblOrderCount; 
    NSString *orderType; 
    NSString *orderCount; 
    BOOL hasOpenOrder; 

} 

@property (nonatomic, strong) IBOutlet UIButton *orderButton; 
@property (nonatomic, strong) IBOutlet UILabel *lblOrderType; 
@property (nonatomic, strong) IBOutlet UILabel *lblOrderCount; 
@property (nonatomic, strong) NSString *orderType; 
@property (nonatomic, strong) NSString *orderCount; 
@property (nonatomic, assign) BOOL hasOpenOrder; 
@property (nonatomic, unsafe_unretained) id<OrderTypeButtonDelegate> delegate; 

-(id) initWithOrderType: (NSString *) anOrderType withOrderCount: (NSString *) anOrderCount hasOpenOrder: (BOOL) openOrder; 
-(IBAction)btnTapped:(id)sender; 

@end 

實現：

#import "OrderTypeButton.h" 

@implementation OrderTypeButton 
@synthesize orderButton; 
@synthesize lblOrderType, lblOrderCount, orderType, orderCount, hasOpenOrder, delegate; 

-(id) initWithOrderType: (NSString *) anOrderType withOrderCount: (NSString *) anOrderCount hasOpenOrder: (BOOL) openOrder { 
    if ((self = [super init])) { 
     self.orderType = anOrderType; 
     self.orderCount = anOrderCount; 
     self.hasOpenOrder = openOrder; 
    } 
    return self; 
} 

- (void)didReceiveMemoryWarning 
{ 
    // Releases the view if it doesn't have a superview. 
    [super didReceiveMemoryWarning]; 
} 

#pragma mark - View lifecycle 

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 

    self.lblOrderType.text =[NSString stringWithFormat:@"%@", self.orderType]; 
    self.lblOrderCount.text = [NSString stringWithFormat:@"%@", self.orderCount]; 
    if (self.hasOpenOrder) { 
     [self.orderButton setBackgroundImage:[UIImage imageNamed:@"background-order-btn-red.png"] forState:UIControlStateNormal]; 
     self.lblOrderType.textColor = [UIColor whiteColor]; 
     self.lblOrderCount.textColor = [UIColor whiteColor]; 
    } 
} 

-(IBAction)btnTapped:(id)sender { 
    NSLog(@"TAPPED"); 
    if ([self delegate]) { 
     [delegate tapped:sender withOrderType:self.orderType]; 
    } 
} 

- (void)viewDidUnload 
{ 
    [self setOrderButton:nil]; 
    [super viewDidUnload]; 
} 

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation 
{ 
    return YES; 
} 

@end 

這似乎相當簡單，我在這裏做什麼，不知道什麼改變與ARC導致我的問題。

Answer 1

也許ARC自動釋放創建的按鈕，嘗試創建按鈕，存儲陣列

//.h file 
@property (nonatomic, strong) NSArray *buttonsArray 

//.m file 
@synthesize buttonsArray 
... 
- (void)viewDidLoad { 
    buttonsArray = [NSArray array]; 
... 
OrderTypeButton *btn = [[OrderTypeButton alloc]initWithOrderType:@"All Orders"   
                withOrderCount:[NSString stringWithFormat:@"%i",[self.ordersPlacedList count]] 
                hasOpenOrder:NO]; 
btn.view.tag = 6969; 
btn.delegate = self; 
[btn.view setFrame:CGRectMake((col * width)+ colspacer, rowHeight + (row * height), frameWidth, frameHeight)]; 
[self.statsView addSubview:btn.view]; 
//Add button to array 
[buttonsArray addObject:btn]; 

而且，這種方法會幫助，如果你想改變的按鈕，或者從視圖