How to URL Decode in iOS - Objective C
NSString *path = [@"path+with+spaces"
     stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

NSString *path = [[@"path+with+spaces"
    stringByReplacingOccurrencesOfString:@"+" withString:@" "]
    stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];