Question

我是iPhone开发的新手。我使用单音设计模式。当我分析我的代码时，它给了我内存泄漏警告，因为“具有+0保留计数的对象被返回给调用者，其中在allocWithZone方法中预期+1（欠）保留计数。”

以下是我的单音班级代码：

#import "SharedHotelMenu.h"

@implementation SharedHotelMenu


//Static instance of Singletone class
static SharedHotelMenu *_hotelMenu=nil;

// Synthesizing properties
@synthesize _hotelEmails,_hotelNames,_hotelPhoneNos;
@synthesize _menuCategoryNames;
@synthesize _menuDetailsNames,_menuDetailsPrices,_menuDetailsFavuorites;
@synthesize _menuTypeNames;
@synthesize _orderedItemName,_orderedItemPrice,_orderedItemQuantity;
@synthesize _selectedMenuContent,_selectedMenuName;
@synthesize _selectedMenuPrice,_selectedMenuQuantity;
@synthesize _menuImageFlag,_orderByFlag,_navigateViewFlag,_registerFlag;
@synthesize _hintA,_hintQ,_userAddress,_userCity,_userCountry,_userEmailID,_toEmailID;
@synthesize _userFirstName,_userGender,_userLastName,_userState; 
@synthesize _userCellNo,_userZip,_userRememberFlag,_userOrderNo;
@synthesize _userName,_userPassword;


//method as the global access point
+ (id)sharedInstanceMethod {
    //synchronized for thread safety when initializing
    @synchronized(self) {
        if(_hotelMenu == nil)
            _hotelMenu = [[super allocWithZone:NULL] init];
    }
    return _hotelMenu;
} 

+ (id)allocWithZone:(NSZone *)zone {
    return [[self sharedInstanceMethod] retain];
 }
- (id)copyWithZone:(NSZone *)zone {
    return self;
}
- (id)retain {
    return self;
}

//sets the object so it can not be released
- (unsigned)retainCount {
    return UINT_MAX;
}

- (id)autorelease {
    return self;
}

//initializing shared object
- (id)init {
    if (self = [super init]) {
        _hotelEmails           = [[NSMutableArray alloc]init];
        _hotelNames            = [[NSMutableArray alloc]init];
        _hotelPhoneNos         = [[NSMutableArray alloc]init];
        _menuTypeNames         = [[NSMutableArray alloc]init];
        _menuDetailsPrices     = [[NSMutableArray alloc]init];
        _menuDetailsNames      = [[NSMutableArray alloc]init];
        _menuCategoryNames     = [[NSMutableArray alloc]init];
        _orderedItemName       = [[NSMutableArray alloc]init];
        _orderedItemPrice      = [[NSMutableArray alloc]init];
        _orderedItemQuantity   = [[NSMutableArray alloc]init];
        _menuDetailsFavuorites = [[NSMutableArray alloc]init];

        _selectedMenuContent   = [[NSString alloc]init];
        _selectedMenuName      = [[NSString alloc]init];
        _hintQ                 = [[NSString alloc]init];
        _hintA                 = [[NSString alloc]init];
        _userAddress           = [[NSString alloc]init];
        _userCity              = [[NSString alloc]init];
        _userCountry           = [[NSString alloc]init];
        _userState             = [[NSString alloc]init];
        _userEmailID           = [[NSString alloc]init];
        _toEmailID             = [[NSString alloc]init];
        _userFirstName         = [[NSString alloc]init];
        _userLastName          = [[NSString alloc]init];
        _userGender            = [[NSString alloc]init];
        _userName              = [[NSString alloc]init];
        _userPassword          = [[NSString alloc]init];
        _userCellNo            = [[NSString alloc]init];
        _userZip               = [[NSString alloc]init];
        _userOrderNo           = [[NSString alloc]init];

        _selectedMenuPrice      = 0;
        _selectedMenuQuantity   = 0;
        _menuImageFlag          = 0;
        _orderByFlag            = 0;
        _navigateViewFlag       = 0;
        _userRememberFlag       = 0;
        _registerFlag           = 0;
    }
    return self;
}

// Should never be called,
- (void)dealloc {
    [super dealloc];
}

 @end

allocwithzone内存泄漏

0 个答案: