Objective-c - Why are parent class initializers called different in swift initialization and object-c initialization?

Question

In swift, we must confirm that the subclass has completed the initialization work before calling the parent class initializer, as follows:

class SubObject: CustomObject {
    var dogName: String
    override init() {
        dogName = "大黄"
        super.init()
    }
}

In Object-c, we must first confirm that the parent class has completed initialization before initializing the subclass:

- (instancetype)init{
    self = [super init];
    if (self) {
        
    }
    return self;
}

Is this the reason?