I have a HTML list of about 500 items and a "filter" box above it. I started by using jQuery to filter the list when I typed a letter (timing code added later): $('#filter').keyup( function() { var jqStart = (new Date).getTime(); var search = $(this).val().toLowerCase(); var $list = $('ul.ablist > li'); $list.each( function() { if ( $(this).text().toLowerCase().indexOf(search) === -1 ) $(this).hide(); else $(this).show(); } ); console.log('Time: ' + ((new Date).getTime() - jqStart)); } ); However, there was a couple of seconds delay after typing each letter (particularly the first letter). So I thought it may be slightly quicker if I used plain Javascript (I read recently that jQuery's each function is particularly slow). Here's my JS equivalent: document.getElementById('filter').addEventListener( 'keyup', function () { var jsStart = (new Date).getTime()...
If you have a serie of images you want to animate you can easily do it with UIImageView:
ReplyDeleteUIImage *blur5 = [UIImage imageNamed:@"blur5.png"];
UIImage *blur6 = [UIImage imageNamed:@"blur6.png"];
self.imageView.animationImages = [[NSArray alloc] initWithObjects:blur5, blur6, nil];
self.imageView.animationRepeatCount = 5;
[self.imageView startAnimating];
I found this easier than trying to use UIWebView.
UIWebView does not properly display all GIF content. You need to use a UIImageView, but the iPhone OS does not support animated GIFS and only displays the first frame.
ReplyDeleteSo you need to extract all of the other frames first.
Crude example code here:
http://pliep.nl/blog/2009/04/iphone_developer_decoding_an_animated_gif_image_in_objc
You can use source at http://blog.stijnspijker.nl/2009/07/animated-and-transparent-gifs-for-iphone-made-easy/
ReplyDeleteIt has a GIF decoder that you can use directly to get solution.
I successfully used it. But it have some problems with transparency.
Excellent article on 'Animating gif and animating images'
ReplyDeletehttp://iphonedevelopertips.com/graphics/animated-gif-animated-images-iphone-style.html
one other option is to decode the gif in your application and then "frame serve" it to a opengl object, this way is less likely to run out of memory for large gifs
ReplyDelete