iTunes程序来完成。:使用电脑上的iTunes程序{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/d\/dd\/Get-Ringtones-for-the-iPhone-Step-1-Version-3.jpg\/v4-460px-Get-Ringtones-for-the-iPhone-Step-1-Version-3.jpg","bigUrl":"https:\/\/www.wikihow.com\/images_en\/d\/dd\/Get-Ringtones-for-the-iPhone-Step-1-Version-3.jpg","smallWidth":460,"smallHeight":345,"bigWidth":760,"bigHeight":570}1下载和安装iTunes程序(仅适用于Windows系统)。apple.com/itunes/download/上免费下载iTunes程序。在电脑上安装iTunes。:打开iTunes程序。{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/3\/36\/Get-Ringtones-for-the-iPhone-Step-5-Version-3.jpg\/v4-460px-Get-Ringtones-for-the-iPhone-Step-5-Version-3.jpg","bigUrl":"https:\/\/www.wikihow.com\/images_en\/3\/36\/Get-Ringtones-for-the-iPhone-Step-5-Version-3.jpg","smallWidth":460,"smallHeight":345,"bigWidth":760,"bigHeight":570}5右键点击iTunes资料库中的文件,选择“显示简介”。”和“停止时间”两栏。{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/1\/16\/Get-Ringtones-for-the-iPhone-Step-11-Version-3.jpg\/v4-460px-Get-Ringtones-for-the-iPhone-Step-11-Version-3.jpg","bigUrl":"https:\/\/www.wikihow.com\/images_en\/1\/16\/Get-Ringtones-for-the-iPhone-Step-11-Version-3.jpg","smallWidth":460,"smallHeight":345,"bigWidth":760,"bigHeight":570}11显示文件的扩展名(仅适用于Windows系统)。点击“查看”选项卡,勾选“文件扩展名”选项。