{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/7\/79\/Know-if-Someone-Is-Online-on-Snapchat-Step-2-Version-2.jpg\/v4-460px-Know-if-Someone-Is-Online-on-Snapchat-Step-2-Version-2.jpg","bigUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/7\/79\/Know-if-Someone-Is-Online-on-Snapchat-Step-2-Version-2.jpg\/v4-760px-Know-if-Someone-Is-Online-on-Snapchat-Step-2-Version-2.jpg","smallWidth":460,"smallHeight":345,"bigWidth":760,"bigHeight":570}2向右滑动屏幕,打开聊天界面。{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/8\/84\/Know-if-Someone-Is-Online-on-Snapchat-Step-6-Version-2.jpg\/v4-460px-Know-if-Someone-Is-Online-on-Snapchat-Step-6-Version-2.jpg","bigUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/8\/84\/Know-if-Someone-Is-Online-on-Snapchat-Step-6-Version-2.jpg\/v4-760px-Know-if-Someone-Is-Online-on-Snapchat-Step-6-Version-2.jpg","smallWidth":460,"smallHeight":345,"bigWidth":760,"bigHeight":570}2向右滑动屏幕,打开聊天界面。