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POProgrammatically adding UIButtons and UIImages to a UIScrollview
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  1. POProgrammatically adding UIButtons and UIImages to a UIScrollview
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    copied!<p>I've modified Apple's <a href="http://developer.apple.com/library/ios/#samplecode/Scrolling/Introduction/Intro.html%23//apple_ref/doc/uid/DTS40008023-Intro-DontLinkElementID_2" rel="nofollow">Scrolling</a> example to grab a series of images created from files referenced in <code>CoreData</code> objects. I can add the images fine, but I also want to programmatically add a <code>UIButton</code> to each image. The number of images depends on the number of <code>CoreData</code> objects, so I can't use IB. </p> <p>Can anyone give me some help on how I would best implement this?</p> <p>Here's the code that grabs the images from the <code>CoreData</code> store:</p> <pre><code>NSUInteger i; for (i = 1; i &lt;= kNumImages; i++) { Sentence *testSentence = [[managedObjectContext executeFetchRequest:request error:&amp;error] objectAtIndex:i]; NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *imageName = [[paths objectAtIndex:0] stringByAppendingPathComponent:[testSentence image]]; NSLog(@"imageName: %@", imageName); UIImage *image = [[UIImage alloc] initWithContentsOfFile:imageName]; NSLog(@"image: %@", image); UIImageView *imageView = [[UIImageView alloc] initWithImage:image]; NSLog(@"imageView: %@", imageView); [imageView setContentMode:UIViewContentModeScaleAspectFit]; [imageView setBackgroundColor:[UIColor blackColor]]; // setup each frame to a default height and width, it will be properly placed when we call "updateScrollList" CGRect rect = imageView.frame; rect.size.height = kScrollObjHeight; rect.size.width = kScrollObjWidth; imageView.frame = rect; imageView.tag = i; // tag our images for later use when we place them in serial fashion [scrollView1 addSubview:imageView]; [image release]; [imageView release]; } [self layoutScrollImages]; // now place the photos in serial layout within the scrollview </code></pre> <p>And here's the code that lays the images out in the scrollview:</p> <pre><code>- (void)layoutScrollImages { UIImageView *view = nil; NSArray *subviews = [scrollView1 subviews]; // reposition all image subviews in a horizontal serial fashion CGFloat curXLoc = 0; for (view in subviews) { if ([view isKindOfClass:[UIImageView class]] &amp;&amp; view.tag &gt; 0) { CGRect frame = view.frame; frame.origin = CGPointMake(curXLoc, 0); view.frame = frame; curXLoc += (kScrollObjWidth); } } // set the content size so it can be scrollable [scrollView1 setContentSize:CGSizeMake((kNumImages * kScrollObjWidth), [scrollView1 bounds].size.height)]; } </code></pre>
 

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