Warning-used as the name of the previous parameter rather than as part of the selector

Warning-used as the name of the previous parameter rather than as part of
the selector

I am using a function in a class as below
-(void)uploadMorePic:(NSDictionary *)MuliPics:(NSData *)file{
It shows the warning - MuliPics used as the name of the previous parameter
rather than as part of the selector
Why that comes ?