Does a class name, say UIImage+Something or UIImageView+Somethingelse, mean that it acts like a custom UIImage or UIImageView?
Does a class name, say UIImage+Something or UIImageView+Somethingelse , mean that it acts like
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Does a class name, say UIImage+Something or UIImageView+Somethingelse, mean that it acts like a custom UIImage or UIImageView?
I think you are looking at the file names of Categories, not Classes. The plus character
+is not allowed in class names or any other identifier in Objective-C.An Objective-C category is a way of adding methods (but not instance variables) to a class you don’t necessarily have the source to. For example, if you frequently want to make upside-down copies of UIImages, you can use a category to add a
upsideDownImagemethod onto the UIImage class.It’s common to save this code in a file named
UIImage+UpsideDown.m(with an accompanying header file,UIImage+UpsideDown.h).