You don't need to clean up the cache if you don't jailbreak the iOS version. Just restart it often. After jailbreaking, you can install Tencent mobile phone housekeeper to clean it up. Its garbage cleaning function is very easy to use, and it can be cleaned automatically and selectively. First, you can clean up those useless system caches with one click, and some data information generated in chat, such as avatar information, picture audio cache and so on. , can be selectively deleted, so as to achieve the purpose of quick cleaning, and won't let you make mistakes.