xcode NSCoder - 使用多级嵌套数组编码数组
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NSCoder - Encoding an Array, with multiple levels of nested arrays
提问by Charl
I have a mainObjectArray (NSMutableArray) which is populated with instances of a custom class. Each instance is itself an array, and objects in each array are NSDates, NSStrings, BOOL, and more arrays containing similar objects.
我有一个 mainObjectArray (NSMutableArray)，它填充了自定义类的实例。每个实例本身就是一个数组，每个数组中的对象是 NSDates、NSStrings、BOOL 以及更多包含类似对象的数组。
What I haven't been able to establish is whether it's possible to, inside the
我无法确定的是是否有可能，在
- (void)encodeWithCoder:(NSCoder *)encoder
method, to just say something like that:
方法，只是说这样的话：
[encoder encodeWithObject:mainObjectArray];
Or do have to encode every object in every instance separately? This would be a bit of a pain...
还是必须分别对每个实例中的每个对象进行编码？这会有点痛...
Your help would be very much appreciated.
您的帮助将不胜感激。
回答by cocoakomali
Just implement the encoding and decoding methods in your custom class. That will do. Some sample,
只需在您的自定义类中实现编码和解码方法。那就行了。一些样品，
- (void)encodeWithCoder:(NSCoder *)encoder
{
[encoder encodeObject:[NSNumber numberWithInt:pageNumber] forKey:@"pageNumber"];
[encoder encodeObject:path forKey:@"path"];
[encoder encodeObject:array forKey:@"array"];
}
- (id)initWithCoder:(NSCoder *)aDecoder
{
if(self = [super init])
{
self.pageNumber = [[aDecoder decodeObjectForKey:@"pageNumber"] intValue];
self.path = [aDecoder decodeObjectForKey:@"path"];
self.array = [aDecoder decodeObjectForKey:@"array"];
}
}
You can see totally three data types being encoded and decoded - int, string, array.
您可以看到总共被编码和解码的三种数据类型——int、string、array。
Hope this helps.
希望这可以帮助。
