Question

I am trying to add elements to a scroll view using this code:

int missionCount;
[connection release];

NSString *responseString = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding];

NSDictionary *missionsDict = [responseString JSONValue];
/*NSArray *luckyNumbers = [json objectWithString:responseString error:&error];*/
NSLog(@"user Info array is: %@", missionsDict);
//    NSDictionary *array = [luckyNumbers1 objectForKey:@"data"];
NSDictionary *missionsData;
missionsData = [missionsDict objectForKey:@"data"];
NSLog(@"missionsData is: %@", missionsData);
NSEnumerator *inner = [missionsData objectEnumerator];
missionsScroll.contentSize = CGSizeMake(768, 1005);

id value;
int badgeY1;
int badgeY2;
int badgeY3;
badgeY1 = 146;
badgeY2 = 188;
badgeY3 = 188;
while((value = [inner nextObject])) {
    NSLog(@"value is: %@", value);
    NSLog(@"progress is: %@", [value objectForKey:@"progress"]);
    NSLog(@"user Info array is: %@", missionsDict);
    NSLog(@"name is: %@",[value objectForKey:@"reward_definitions"]);
    NSLog(@"missionsData is: %@", missionsData);
    NSDictionary *moreData;
    moreData = [value objectForKey:@"reward_definitions"];
    NSEnumerator *inner2 = [moreData objectEnumerator];
    id value2;
    int badgeX;
    int badgeCount;
    badgeX = 0;
    badgeCount = 0;
    while((value2 = [inner2 nextObject])) {
        UIProgressView *progressView;
        progressView = [[UIProgressView alloc] initWithFrame:CGRectMake(323, badgeY1, 372, 9)];
        float progressValue;
        progressValue = ([[[value objectForKey:@"progress"] objectForKey:@"earned"] floatValue] / [[[value objectForKey:@"progress"] objectForKey:@"possible"] floatValue]);
        NSLog(@"progressValue is: %f", progressValue);
        [progressView setProgress:progressValue];
        [missionsScroll addSubview:progressView];
        UILabel *missionName;
        missionName = [[UILabel alloc] initWithFrame:CGRectMake(66, badgeY1, 227, 21)];
        missionName.backgroundColor = [UIColor clearColor];
        missionName.textColor = [UIColor whiteColor];
        missionName.font = [UIFont fontWithName:@"Heiti TC" size:23.0];
        missionName.text = [value objectForKey:@"name"];
        [missionsScroll addSubview:missionName];

        UILabel *requirementsLabel;
        requirementsLabel = [[UILabel alloc] initWithFrame:CGRectMake(66, badgeY2+25, 227, 21)];
        requirementsLabel.backgroundColor = [UIColor clearColor];
        requirementsLabel.textColor = [UIColor whiteColor];
        requirementsLabel.font = [UIFont fontWithName:@"Papyrus" size:19];
        requirementsLabel.text = @"To complete you need:";
        [missionsScroll addSubview:requirementsLabel];

        NSLog(@"Image URL is: %@", [value2 objectForKey:@"image_url"]);
        NSURL *url1 = [NSURL URLWithString: [NSString stringWithFormat:@"%@", [value2 objectForKey:@"image_url"]]];            
        NSData *urlData1 = [NSData dataWithContentsOfURL:url1];
        UIImage *image1 = [UIImage imageWithData:urlData1];
        UIImageView *badge = [[UIImageView alloc] initWithImage:image1];
        [badge setFrame:CGRectMake(badgeX, badgeY2+70, 70, 70)];               
        [missionsScroll addSubview:badge];
        [badge release];
        badgeCount = badgeCount+1;
        NSLog(@"badgeCount is: %i", badgeCount);
        if (badgeCount == 4) {
            NSLog(@"Badge Count = 4");
            badgeY2 = badgeY2 +70;
            badgeX = 0;
            badgeCount = 0;
        } else {
            NSLog(@"Badge Count ≠ 4");
            badgeX = badgeX +75;
        }

    }
    NSLog(@"1st While loop done");

    // NSLog(@"reward_definitions is: %@", [missionsData objectForKey:@"id"]);
    //       NSLog(@"Image URL is: %@", [[value objectForKey:@"reward_definitions"] objectForKey:@"image_url"]);
    //if ( [array isKindOfClass:[NSDictionary class]] ) {
    badgeY1 = badgeY1 +200;

    badgeY2 = badgeY2 +200;

    badgeY3 = badgeY3 +200;
    missionCount = missionCount+1; 
}
NSLog(@"While loops done");

for (int a; missionCount > 4; a = a+1) {
    missionsScroll.contentSize = CGSizeMake(776, missionsScroll.contentSize.height+200);
}

Nothing is showing up in the scroll view.

Answer 1

It’s not obvious what is happening, but first things to check are where the views are valid (not nil) and that this code is running on the main thread.

Put these in and post the results.

   NSLog(@"missionsScroll: %@", (missionsScroll==nil)?@"NIL":@"OK");
   NSLog(@"progressView: %@", (progressView==nil)?@"NIL":@"OK");
   NSLog(@"missionName: %@", (missionName==nil)?@"NIL":@"OK");
   NSLog(@"mainThread: %@", ([NSThread isMainThread])?@"OK":@"Background Thread");