问题
After I created a Objective-c class in my project based on JosephH example. I imported it in my bridging header file.
I was actually able to make it work using a .pdf file in the main bundle
NSString *file = [[NSBundle mainBundle] pathForResource:@"hello-world" ofType:@"pdf"];.
which returns:
"/var/containers/Bundle/Application/63F34E6B-75A7-4CC0-9149-9DF2861DF3A2/sempre-editora.app/hello-world.pdf"
It did render everything all right, zooming and everything. but when I try to render a file in my "Documents" folder it just doesn't work. I even tried to just put this "hello-world.pdf" file inside my "Documents" to try it out and it still doesn't work. This is the path of my documents file:
"/var/mobile/Containers/Data/Application/AF776E50-FAAC-4274-824F-4F9634E072F6/Documents/70-10"
What could be the problem? I'm sure this is the correct path for my file, and it actually exists, the framework doesn't throw any error but I just get a gray background.
I thought it could be because my file doesn't have an extension but when I add a .pdf to my file and try to render it, it crashes.
After some tests I realised that when the PDF has two pages, and I go to the second page, it actually renders the pdf.
来源：https://stackoverflow.com/questions/37703686/integrate-mupdf-swift-ios-project