{"id":24207,"date":"2022-12-01T04:02:49","date_gmt":"2022-11-30T22:32:49","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-autoscrolling-with-zooming-image-in-iphone\/"},"modified":"2022-12-01T04:02:49","modified_gmt":"2022-11-30T22:32:49","slug":"solved-autoscrolling-with-zooming-image-in-iphone","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-autoscrolling-with-zooming-image-in-iphone\/","title":{"rendered":"[Solved] AutoScrolling with zooming image in iphone"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-15222028\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"15222028\" data-parentid=\"15221835\" data-score=\"1\" data-position-on-page=\"1\" data-highest-scored=\"1\" data-question-has-accepted-highest-score=\"1\" itemprop=\"acceptedAnswer\" itemscope itemtype=\"https:\/\/schema.org\/Answer\">\n<div class=\"post-layout\">\n<div class=\"votecell post-layout--left\"><\/div>\n<div class=\"answercell post-layout--right\">\n<div class=\"s-prose js-post-body\" itemprop=\"text\">\n<pre><code>- (void)viewDidLoad\n{\n [super viewDidLoad];\n\n\/\/ 1\n   UIImage *image = [UIImage imageNamed:@\"photo1.png\"];\n   self.imageView = [[UIImageView alloc] initWithImage:image];\n   self.imageView.frame = (CGRect){.origin=CGPointMake(0.0f, 0.0f), .size=image.size};\n  [self.scrollView addSubview:self.imageView];\n\n\/\/ 2\n   self.scrollView.contentSize = image.size; \n  }\n<\/code><\/pre>\n<p><strong>viewDidLoad<\/strong><\/p>\n<blockquote>\n<ol>\n<li>\n<p>First, you need to create an image view with the photo1.png image you added to your project and you set the image view frame (it\u2019s size<br \/>\n  and position) so it\u2019s the size of the image and sits at point 0,0<br \/>\n  within the parent. Finally, the image view gets added as a subview of<br \/>\n  your scroll view.<\/p>\n<\/li>\n<li>\n<p>You have to tell your scroll view the size of the content contained within it, so that it knows how far it can scroll<br \/>\n  horizontally and vertically. In this case, it\u2019s the size of the image.<\/p>\n<\/li>\n<\/ol>\n<\/blockquote>\n<pre><code>- (void)viewWillAppear:(BOOL)animated {\n[super viewWillAppear:animated];\n\n\/\/ 1\nCGRect scrollViewFrame = self.scrollView.frame;\nCGFloat scaleWidth = scrollViewFrame.size.width \/ self.scrollView.contentSize.width;\nCGFloat scaleHeight = scrollViewFrame.size.height \/ self.scrollView.contentSize.height;\nCGFloat minScale = MIN(scaleWidth, scaleHeight);\nself.scrollView.minimumZoomScale = minScale;\n\n\/\/ 2\nself.scrollView.maximumZoomScale = 1.0f;\nself.scrollView.zoomScale = minScale;\n<\/code><\/pre>\n<p>}<\/p>\n<p><strong>viewWillAppear<\/strong><\/p>\n<blockquote>\n<ol>\n<li>\n<p>Next, you need to work out the minimum zoom scale for the scroll view. A zoom scale of one means that the content is displayed at<br \/>\n  normal size. A zoom scale below one shows the content zoomed out,<br \/>\n  while a zoom scale of greater than one shows the content zoomed in.<\/p>\n<\/li>\n<li>\n<p>You set the maximum zoom scale as 1, because zooming in more than the image\u2019s resolution can support will cause it to look blurry. You<br \/>\n  set the initial zoom scale to be the minimum, so that the image starts<br \/>\n  fully zoomed out.<\/p>\n<\/li>\n<\/ol>\n<\/blockquote><\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\"><\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved AutoScrolling with zooming image in iphone <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] &#8211; (void)viewDidLoad { [super viewDidLoad]; \/\/ 1 UIImage *image = [UIImage imageNamed:@&#8221;photo1.png&#8221;]; self.imageView = [[UIImageView alloc] initWithImage:image]; self.imageView.frame = (CGRect){.origin=CGPointMake(0.0f, 0.0f), .size=image.size}; [self.scrollView addSubview:self.imageView]; \/\/ 2 self.scrollView.contentSize = image.size; } viewDidLoad First, you need to create an image view with the photo1.png image you added to your project and you set the image view &#8230; <a title=\"[Solved] AutoScrolling with zooming image in iphone\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-autoscrolling-with-zooming-image-in-iphone\/\" aria-label=\"More on [Solved] AutoScrolling with zooming image in iphone\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[5145,471,469,542,2381],"class_list":["post-24207","post","type-post","status-publish","format-standard","hentry","category-solved","tag-autoscroll","tag-ios","tag-iphone","tag-uiimageview","tag-zooming"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>[Solved] AutoScrolling with zooming image in iphone - JassWeb<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jassweb.com\/solved\/solved-autoscrolling-with-zooming-image-in-iphone\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] AutoScrolling with zooming image in iphone - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] - (void)viewDidLoad { [super viewDidLoad]; \/\/ 1 UIImage *image = [UIImage imageNamed:@&quot;photo1.png&quot;]; self.imageView = [[UIImageView alloc] initWithImage:image]; self.imageView.frame = (CGRect){.origin=CGPointMake(0.0f, 0.0f), .size=image.size}; [self.scrollView addSubview:self.imageView]; \/\/ 2 self.scrollView.contentSize = image.size; } viewDidLoad First, you need to create an image view with the photo1.png image you added to your project and you set the image view ... 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