我试图为我的模型类创建一个通用的编码器和解码器.我试图找到一种方法来为所有类型的属性调用“编码方法”,无论是对象(NSString,NSNumber,NSArray等)还是原始类型.我看到有人在做以下事情.我想知道这是否是一种正确的方法.
属性：
@property (assign,nonatomic) int integerP; @property (assign,nonatomic) float floatP; @property (assign,nonatomic) BOOL boolP;
Enconder和解码器代码：
- (void)encodeWithCoder:(NSCoder *)encoder
{
id object2 = [self valueForKey:@"integerP"];
id object3 = [self valueForKey:@"floatP"];
id object4 = [self valueForKey:@"boolP"];
[encoder encodeObject:object2 forKey:@"integerP"];
[encoder encodeObject:object3 forKey:@"floatP"];
[encoder encodeObject:object4 forKey:@"boolP"];
//[self setValue:[NSNumber numberWithInt:90] forKey:@"heightR"];
//NSLog(@"%@",[self valueForKey:@"heightR"]);
}
- (id)initWithCoder:(NSCoder *)decoder
{
self = [super init];
if( self != nil )
{
id object2 = [decoder decodeObjectForKey:@"integerP"];
[self setValue:object2 forKey:@"integerP"];
id object3 = [decoder decodeObjectForKey:@"floatP"];
[self setValue:object3 forKey:@"floatP"];
id object4 = [decoder decodeObjectForKey:@"boolP"];
[self setValue:object4 forKey:@"boolP"];
}
return self;
}
我不确定这是否是正确的方法,或者其他程序或对象是否可以写入原始属性的相同内存空间.如果上面的方法是正确的,上面和下面的区别是什么：
我认为的方式是正确的：
- (void)encodeWithCoder:(NSCoder *)encoder
{
[encoder encodeInt:integerP forKey:@"integerP"];
[encoder encodeFloat:floatP forKey:@"floatP"];
[encoder encodeBool:boolP forKey:@"boolP"];
//[self setValue:[NSNumber numberWithInt:90] forKey:@"heightR"];
//NSLog(@"%@",[self valueForKey:@"heightR"]);
}
- (id)initWithCoder:(NSCoder *)decoder
{
self = [super init];
if( self != nil )
{
integerP = [decoder decodeIntForKey:@"integerP"];
floatP = [decoder decodeFloatForKey:@"floatP"];
boolP = [decoder decodeBoolForKey:@"boolP"];
}
return self;
}
我测试了,两种方法都返回了正确的值.
