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Question

打印的ASCII紡「光標」我有一個Ruby腳本，做一些長期服用的工作。它只是命令行，我想表明該腳本仍在運行，不會停止。過去我習慣於喜歡所謂的「旋轉光標」，並在Windows下的Ruby中設法重現它。

問：做這項工作中的其他OS的？如果沒有，是否有一種操作系統無關的方式來實現這一目標？

沒有IRB的解決方案吧。

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，這適用於Windows，Mac OS X和Linux。提高由Niklas'的建議，可以讓這個更一般像這樣：

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!" 

：

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) 

如果你不知道這個過程會有多長時間，你可以在另一個線程這樣做這一次輸出：從彼得

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 

編輯：這裏的工作版本

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

spin_it 10 

Answer 3

我寫了一個gem spin_to_win，顯示一個微調器，同時產生一個塊。例如：

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

Zzzz \ [sleepy] 

它還可以跟蹤工作的未決對完成的工作：

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 

Zzzz \ 3 of 3 [wake up!]