{"id":492,"date":"2013-10-26T21:59:24","date_gmt":"2013-10-26T19:59:24","guid":{"rendered":"http:\/\/www.albertopasca.it\/whiletrue\/?p=492"},"modified":"2018-05-25T16:55:46","modified_gmt":"2018-05-25T14:55:46","slug":"objc-simple-uiimage-fade","status":"publish","type":"post","link":"https:\/\/www.albertopasca.it\/whiletrue\/objc-simple-uiimage-fade\/","title":{"rendered":"Objc \u2013 Simple UIImage fade"},"content":{"rendered":"

Implementation of\u00a0kCATransitionFade<\/strong>\u00a0to fade an array of images.<\/p>\n

Very easy using\u00a0CATransition<\/strong>\u00a0animation:<\/p>\n

<\/p>\n

[code lang=”java” autolinks=”false” collapse=”false” firstline=”1″ gutter=”true” htmlscript=”false” light=”false” padlinenumbers=”false” smarttabs=”true” tabsize=”4″ toolbar=”false”]CATransition\u00a0*transition\u00a0=\u00a0[CATransition animation];
\ntransition.type\u00a0=\u00a0kCATransitionFade;[\/code]<\/p>\n

Full implementation:<\/h5>\n

I\u2019ve created an\u00a0UIView class<\/strong>\u00a0named\u00a0APFadeImage<\/strong>, and used in Interface Builder.<\/p>\n

This the header,<\/p>\n

[code lang=”java” autolinks=”false” collapse=”false” firstline=”1″ gutter=”true” htmlscript=”false” light=”false” padlinenumbers=”false” smarttabs=”true” tabsize=”4″ toolbar=”false”]@interface\u00a0APFadeImage\u00a0()<\/p>\n

@property\u00a0(nonatomic, weak)\u00a0IBOutlet UIImageView\u00a0*imageView;
\n@property\u00a0(nonatomic, copy)\u00a0NSArray\u00a0*images;<\/p>\n

@end[\/code]<\/p>\n

And this the \u201cfooter\u201d,<\/p>\n

[code lang=”java” autolinks=”false” collapse=”false” firstline=”1″ gutter=”true” htmlscript=”false” light=”false” padlinenumbers=”false” smarttabs=”true” tabsize=”4″ toolbar=”false”]@implementation\u00a0APFadeImage<\/p>\n

–\u00a0(id)\u00a0initWithCoder:(NSCoder\u00a0*)aDecoder
\n{
\n self\u00a0=\u00a0[super initWithCoder:aDecoder];
\n if\u00a0(self)
\n {
\n self.images\u00a0=\u00a0@[[UIImage imageNamed:@"A.jpg"],
\n [UIImage imageNamed:@"B.jpg"],
\n [UIImage imageNamed:@"C.jpg"],
\n [UIImage imageNamed:@"D.jpg"]];<\/p>\n

[\u00a0NSTimer\u00a0scheduledTimerWithTimeInterval:4.0
\n target:self
\n selector:@selector(switchImage)
\n userInfo:nil
\n repeats:YES];
\n }
\n return\u00a0self;
\n}<\/p>\n

–\u00a0(void)\u00a0switchImage
\n{
\n CATransition\u00a0*transition\u00a0=\u00a0[CATransition animation];
\n transition.type\u00a0=\u00a0kCATransitionFade;
\n transition.duration\u00a0=\u00a02;<\/p>\n

[self.imageView.layer addAnimation:transition forKey:nil];<\/p>\n

UIImage\u00a0*currentImage\u00a0=\u00a0self.imageView.image;
\n NSUInteger index\u00a0=\u00a0[self.images indexOfObject:currentImage];
\n index\u00a0=\u00a0(index\u00a0+\u00a01)\u00a0%\u00a0[self.images count];<\/p>\n

self.imageView.image\u00a0=\u00a0self.images[index];
\n}<\/p>\n

@end[\/code]<\/p>\n

Done.
\nAdd your class in your UIView and go!<\/p>\n","protected":false},"excerpt":{"rendered":"

Implementation of\u00a0kCATransitionFade\u00a0to fade an array of images. Very easy using\u00a0CATransition\u00a0animation:<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[1],"tags":[468,41,425,469,470,254],"class_list":["post-492","post","type-post","status-publish","format-standard","hentry","category-generic","tag-addanimation","tag-animation","tag-catransition","tag-fade","tag-kcatransitionfade","tag-uiimage"],"yoast_head":"\nObjc \u2013 Simple UIImage fade - while (true) {\u00a0}<\/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:\/\/www.albertopasca.it\/whiletrue\/objc-simple-uiimage-fade\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Objc \u2013 Simple UIImage fade - while (true) {\u00a0}\" \/>\n<meta property=\"og:description\" content=\"Implementation of\u00a0kCATransitionFade\u00a0to fade an array of images. 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