Play or pause a song or video.(播放歌曲或视频)
Tap the center button once to pause, and once again to resume.
Fast forward or rewind through a song.(快进或倒回歌曲)
Fast forward by tapping the center button twice and holding down on the second tap. Rewind by tapping three times and holding down the third tap.
Switch between calls.(转化通化)
Switch to a new incoming call by tapping the center button once. You can end that new call by holding down the center button for two seconds.
Take a picture.(拍照)
Inside the default camera app, press the volume up button to take a picture. This doesn't work with other camera apps, such as Instagram.
Activate Siri.(启动Siri)
If you're sporting an iPhone 4S of iPhone 5, tap and hold the center button to activate Siri.
Skip to the next song.(切换到下一首歌)
Double-tap the center button to skip to the next song. (You can even triple-tap to go to the previous song.)
Answer and end calls.(接电话、挂电话)
Just tap the center button once to answer and once to hang up.
Ignore incoming calls.(拒接电话)
Press and hold the center button for a couple seconds, then release it. You'll hear two beeps when the call's been disconnected.