在控制台打印的ASCII纺“光标”(Printing an ASCII spinning “curs

我有一个Ruby脚本，做一些长期服用的工作。只有命令行，我想表明，该脚本仍在运行并没有停止。我以前喜欢在旧时代所谓的“旋转光标”，我设法复制它在Ruby中Windows下。

问：是否在其他OS的这项工作？如果没有，有没有做到这一点的操作系统无关的方式吗？

没有IRB解决方案讨好。

10.times {
  print "/"
  sleep(0.1)
  print "\b"
  print "-"
  sleep(0.1)
  print "\b"
  print "\\"
  sleep(0.1)
  print "\b"
  print "|"
  sleep(0.1)
  print "\b"
}

Answer 1:

是的，这适用于Windows，Mac OS X和Linux。提高由Niklas'的建议，可以让这个更一般像这样：

def show_wait_cursor(seconds,fps=10)
  chars = %w[| / - \\]
  delay = 1.0/fps
  (seconds*fps).round.times{ |i|
    print chars[i % chars.length]
    sleep delay
    print "\b"
  }
end

show_wait_cursor(3)

如果你不知道这个过程需要多长时间，你可以在另一个线程这样做：

def show_wait_spinner(fps=10)
  chars = %w[| / - \\]
  delay = 1.0/fps
  iter = 0
  spinner = Thread.new do
    while iter do  # Keep spinning until told otherwise
      print chars[(iter+=1) % chars.length]
      sleep delay
      print "\b"
    end
  end
  yield.tap{       # After yielding to the block, save the return value
    iter = false   # Tell the thread to exit, cleaning up after itself…
    spinner.join   # …and wait for it to do so.
  }                # Use the block's return value as the method's
end

print "Doing something tricky..."
show_wait_spinner{
  sleep rand(4)+2 # Simulate a task taking an unknown amount of time
}
puts "Done!"

这一个输出：

Doing something tricky...|
Doing something tricky.../
Doing something tricky...-
Doing something tricky...\ 
(et cetera)
Doing something tricky...done!

Answer 2:

# First define your chars
pinwheel = %w{| / - \\}

# Rotate and print as often as needed to "spin"
def spin_it
  print "\b" + pinwheel.rotate!.first
end

从彼得编辑：这里的工作版本

def spin_it(times)
  pinwheel = %w{| / - \\}
  times.times do
    print "\b" + pinwheel.rotate!.first
    sleep(0.1)
  end
end

spin_it 10

Answer 3:

我写了一个宝石spin_to_win显示一个微调而产生的块。例如：

SpinToWin.with_spinner('Zzzz') do |spinner| 
  spinner.banner('sleepy')
  sleep 1 
end

Zzzz \ [sleepy]

它还可以跟踪工作的未决对工作完成：

SpinToWin.with_spinner('Zzzz') do |spinner|
    spinner.increment_todo!(3)

    spinner.banner('snore')
    sleep 1
    spinner.increment_done!

    spinner.banner('dream')
    sleep 1
    spinner.increment_done!

    spinner.banner('wake up!')
    sleep 1
    spinner.increment_done!
end