objective-c - 实现NSCoding的对象子类化时，是否需要调用[super encodeWithCoder]？

Question

我知道当你编写实现 NSCoding 的对象的子类的 initWithCoder 方法时，你必须调用 super initWithCoder(而不是 super init)，但是我必须在encodeWithCoder的实现中调用super encodeWithCoder？

Answer 1

如果您继承自支持编码的类，通常建议在您的encodeWithCoder: 方法中使用[super encodeWithCoder:]，与 [super initWithCoder:] 用于 initWithCoder: 方法。

文档: NSCoding Protocol Reference

引用: http://www.cocoadev.com/index.pl?NSCoder

if the class inherits from a Class that conforms to (NSObject does not conform) then you should include the [encodeWithCoder:] method.

//  <NSCoding> protocol methods

-(void)encodeWithCoder:(NSCoder*)coder
{
    [super encodeWithCoder:coder];
    /*
    [coder encodeObject: theNSStringInstanceVariable];
    [coder encodeObject: theNSDictionaryInstanceVariable];
    [coder encodeValueOfObjCType:@encode(BOOL) at:&theBooleanInstanceVariable];
    [coder encodeValueOfObjCType:@encode(float) at:&theFloatInstanceVariable];
    */
}