如何釋放靜態類

Question

我有一個靜態類女巫有兩個屬性，像下面的屬性...

@interface Global : NSObject 
    { 

     BarcodeScanner* scanner; 
     NSInteger warehouseID; 
    } 

    @property(assign) BarcodeScanner* scanner; 
    @property(assign) NSInteger warehouseID; 


    +(Global *)sharedInstance; 

    @end 

---

#import "Global.h" 

    @implementation Global 
    @synthesize scanner,warehouseID; 

    + (Global *)sharedInstance 
    { 

     static Global *globalInstance = nil; 

     if (nil == globalInstance) { 
      globalInstance = [[Global alloc] init]; 

      globalInstance.scanner = [[BarcodeScanner alloc] init]; 

      globalInstance.warehouseID = 1; 
     } 

     return globalInstance; 
    } 

    -(void) dealloc 
    { 
     [super dealloc]; 
    } 

@end 

現在，當我分析項目在Xcode我得到了警告內存泄漏的掃描儀和warehouseID屬性，當我嘗試釋放它們在dealloc方法一樣......

[[[Global sharedInstance] scanner]release]; 

我得到警告「不正確decreme nt對象的引用計數...「

我應該如何解決這個問題。

非常感謝您的幫助。

Answer 1

該警告是因爲您的代碼與分析儀使用的規則不匹配。爲了避免該警告

1. 使掃描儀屬性保留
2. 變化的實例或BarcodeScanner被自動釋放
3. 在dealloc中添加釋放掃描器

例（格式化只是爲了節省空間）：

@class BarcodeScanner; 
@interface Global : NSObject { 
    BarcodeScanner* scanner; 
    NSInteger warehouseID; 
} 
@property(retain) BarcodeScanner* scanner; 
@property(assign) NSInteger warehouseID; 

+(Global *)sharedInstance; 
@end 

@implementation Global 
@synthesize scanner,warehouseID; 

+ (Global *)sharedInstance { 
    static Global *globalInstance = nil; 

    if (nil == globalInstance) { 
     globalInstance = [[Global alloc] init]; 
     globalInstance.scanner = [[[BarcodeScanner alloc] init] autorelease]; 
     globalInstance.warehouseID = 1; 
    } 
    return globalInstance; 
} 

-(void) dealloc { 
    [scanner release]; 
    [super dealloc]; 
} 
@end 

Answer 2

剛剛離開它來自動釋放池

globalInstance.scanner = [[[BarcodeScanner的alloc] INIT]自動釋放];