强制保留类的新实例,因此泄漏内存

我创建了一个属性列表,在未归档时,初始化一个名为“SelectableObject”的类的实例数组。SelectableObject类不包含init方法,它只是一些实例变量的容器,当然符合NSCoding。

当选择SelectableObject时,我初始化SelectableObject子类的一个新实例,这取决于选择了哪个对象。称之为“AnimalObject”。

我为AnimalObject编写了一个自定义的初始化器,它以SelectableObject作为参数,获取SelectableObject的值,然后添加一些自己的值。方法如下:

- (AnimalObject *)initWithObject:(SelectableObject *)selectedObject

我在选择屏幕上这样称呼它:

AnimalObject *animal = [[AnimalObject alloc] initWithObject:self.selectedObject];

其中self.selected object是从选择屏幕中选择的对象。

现在,在AnimalObject的初始化器中,我设置了初始值,然后在返回之前,调用

[self saveToFile];

将新对象保存到文件。所以在选择屏幕上初始化后,我应该可以立即释放它,对吧?

但是,如果我试图释放它,即

    AnimalObject *animal = [[AnimalObject alloc] initWithObject:self.selectedObject];
[animal release];

我撞车了。

如果我不释放它,就会得到一个警告:AnimalObject initialiser中初始化的所有ivar都在泄漏内存。

我试过在selectionScreen中创建AnimalObject属性,并在释放之前将新对象分配给它,但这仍然会崩溃,即。

self.newAnimal = animal;
[animal release];

我在想,从我上面的描述来看,我是不是做错了什么?就像从初始化器中保存类一样。或者将父类作为对象传递给子类的初始化器。。。我不确定为什么我不能释放我创建的对象的实例。

谢谢你的帮助!

编辑好,这是我的代码:

可选择的对象类:

#define kObjectNumberKey            @"ObjectNumber"
#define kObjectTypeKey              @"Type"
#define kObjectNameKey              @"Name"
#define kObjectThumbKey             @"Thumb"
#define kObjectMainKey              @"Main"

#import <Foundation/Foundation.h>

@interface SelectableObject : NSObject <NSCoding> {
    int         number;
    NSString    *type;
    NSString    *name;
    NSString    *thumbString;
    NSString    *mainString;
}

@property (nonatomic, assign) int number;
@property (nonatomic, retain) NSString *type;
@property (nonatomic, retain) NSString *name;
@property (nonatomic, retain) NSString *thumbString;
@property (nonatomic, retain) NSString *mainString;

@end

#import "SelectableObject.h"

@implementation SelectableObject

@synthesize number;
@synthesize type;
@synthesize name;
@synthesize thumbString;
@synthesize mainString;


- (void)dealloc {
    NSLog(@"Selectable Object DEALLOC");
    [name release];
    [type release];
    [thumbString release];
    [mainString release];
    [super dealloc];
}

#pragma mark -
#pragma mark NSCoding

- (void)encodeWithCoder:(NSCoder *)aCoder {
    [aCoder encodeInt:self.number forKey:kObjectNumberKey];
    [aCoder encodeObject:self.type forKey:kObjectTypeKey];
    [aCoder encodeObject:self.name forKey:kObjectNameKey];
    [aCoder encodeObject:self.thumbString forKey:kObjectThumbKey];
    [aCoder encodeObject:self.mainString forKey:kObjectMainKey];
}

- (id)initWithCoder:(NSCoder *)aDecoder {
    if (self = [super init]) {
        self.number = [aDecoder decodeIntForKey:kObjectNumberKey];
        self.type = [aDecoder decodeObjectForKey:kObjectTypeKey];
        self.name = [aDecoder decodeObjectForKey:kObjectNameKey];
        self.thumbString = [aDecoder decodeObjectForKey:kObjectThumbKey];
        self.mainString = [aDecoder decodeObjectForKey:kObjectMainKey];
    }
    return self;
}

@end

在另一个VC中创建新动物对象的代码,其中包含选定对象的详细信息:

- (void)createNewAnimal {
    self.selectedObject.name = self.nameField.text;

    Animal *animal = [[Animal alloc] initWithObject:self.selectedObject];
//  [animal release]; (causes it to crash)

    // Initialise the new Root Controller and load with selected object
}

在动物课上:

- (Animal *)initWithObject:(SelectableObject *)selectedObject {
    if (self = [super init]) {
        //Initialise all the values
        dateCreated = [[NSDate alloc] init];
        dateLastUsed = [[NSDate alloc] init];
        name = selectedObject.name;
        thumbString = selectedObject.thumbString;
        mainString = selectedObject.mainString;
    }   
    [self saveToFile];
    return self;
}