Question

Right i have three NSStrings that i want to put together to make one long nsstring (to use as a URL). I have used stringByAppedingString which lets me put two of the together but i do not know how to put three together. Basically what i want to end up with is http://graph.facebook.com/517418970/picture?type=large but i need them in three separate components so i can change the number in the URl

@implementation FacebookPicturesViewController

- (IBAction) nextImagePush {

    NSString *prefix = @"http://graph.facebook.com/";
    NSString *profileId = @"517418970";
    NSString *suffix = @"/picture?type=large";
    NSString *url = [prefix stringByAppendingString:suffix];
    UIImage *img = [UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:url]]];
    [imageView setImage:img];
    imageCount++;


    if (imageCount >= [imageArray count]){
        imageCount = 0;
    }
}

- (void) viewDidLoad {
    imageArray = [[NSArray alloc] initWithObjects:@"image1", @"image2", nil];
    imageCount = 0;
}

Answer 1

You could just do it in two steps:

NSString* partialUrl= [prefix stringByAppendingString:profileID];
NSString* fullUrl= [partialUrl stringByAppendingString:suffix];

Alternatively, you could use a format:

NSString* url= [NSString stringWithFormat:@"%@%@%@", prefix, profileID, suffix];