ImageMagick 运行在iOS上似乎很合适.但是，假设您有权访问该API，我将考虑对其进行修改.如果大多数图像已经采用某种格式并且必须进行转换，那么您的客户就需要等待很多时间.如果您的API可以与多种格式的图像进行交互，那么您已经为许多人节省了一些时间.

ImageMagick runs on iOS and seems to fit the bill. However, I would consider modifying the API, assuming you have access to it. If the majority of images are already in a certain format and have to be converted, that's a lot of waiting time for your customers. If your API can interact with images in several formats, then you have saved a bit of time for a number of people.