Swift中的变分方法

Question

目标C代码：

- (instancetype)initWithInts:(int32_t)int1, ... {
    va_list args;
    va_start(args, int1);
    unsigned int length = 0;
    for (int32_t i = int1; i != -1; i = va_arg(args, int)) {
        length ++;
    }
    va_end(args);
    ...
    ...
    return self;
}

此代码用于计算方法参数的数目。

convenience init(ints: Int32, _ args: CVarArgType...) {
    var length: UInt = 0
    self.init(length: args.count)
    withVaList(args, { _ in
        // How to increase length' value in loop?
    })
}

Answer 1

不如就

convenience init(args: Int...) {
  return args.count
}