I m working on web app in GWT, and need to implement sth like http://instagr.am/ that cycle the screenshots. any one knows what gwt library can do that? Much thanks.
Looking at the implementation of it in Chrome's developer tools it looks like it should be pretty easy to mimic, without a library.
It looks like has a div with a background image of let's say Img1.png, containing an img tag of Img2.png. Then it slowly changes the img tag's opacity to 0, in effect hiding Img2 in favor of its background, Img1.
When it's done, it then switches the div's background image to be the one in the img tag, and picks Img3.png as the div's new background image. Continue this process forever for the effect.
It shouldn't be hard to implement this effect in GWT with a combination of Animation and Style as I've described.
Related
I recently came across this app, tinder, which has a really cool functionality.
You start off with X images. User can swipe left or right to go through each image to signal whether the user likes or dislikes something.
An image can be seen here:
I have been looking at UICollectionView to do this, but I am a little confused about the custom layout I should be using.
I have been thinking of generating a bunch of cells and then setting different z-index and stacking them on top of one another with the same frame.x.
Any tutorial/advise/help available?
This is simple UIImageviews. and tinder only showing two top images and set a background frame just like facebook image gallery.
When you swipe top image current thread fire next image and it replace current image with new image. And you can add like, comment views as you want.
This sounded like fun, so I built an open-source library that mimics the interface you described.
https://github.com/modocache/MDCSwipeToChoose
The sample app included in the project is nearly identical to the UI in your screenshot.
I'm using CSS transitions for the background-image property, though from what I can gather they are only supported by Chrome and Webkit (it doesn't seem to work in Safari 5.1.7). I really don't want to use jQuery for the transition since its only solution is to fade out the element (and with it the content) and fade back with a new background. Normally I would do it the standard way and have multiple divs or images inside a wrapper to rotate between, but the way this site is set up that simply wouldn't work (well technically it could, but it just seems ridiculously and needlessly over-complicated).
Visit the site here and you'll see what I mean: http://bos.rggwebdesigns.com/
Is there some way to safely fall back for other browsers that don't yet support background image transitions, either by disabling it completely or some other method? If the browser can't handle it, I don't want the user to just see the background change abruptly.
You can use Modernizr for feature detection, and then change your CSS on the fly accordingly.
Modernizr
I'm looking for a simple method to implement a 'loading' indicator on img elements for Mobile Safari (and possibly other mobile agents). At first sight, using the background: property on such elements seems the way to go. There are two problems though:
Agents tend to start rendering already when only part of the image is loaded. This looks pretty weird in combination with the loading indicator image.
I'd like to apply a css3 rotation animation (spin) to the loading indicator (and not to the final image).
Setting the content css property to '' and a simple class-tag that indicates the image is loading would work around this. Unfortunately, this also somehow prevents Mobile Safari from doing the animation (although it seems to work fine in Chrome).
Other (and perhaps better) solutions would involve multiple elements, but I am specifically trying to prevent this. Css pseudo classes :before or :after also do not work in combination with animations.
My attempt thusfar: https://gist.github.com/1225523#file_loading.html
Any suggestions?
I would suggest spin.js that is all CSS3 based and it don't use any image. You can customize your spinner very easy.
SPIN.JS
I am trying to work out (or find) a button that looks half decent for use in my app. In the image below I have two buttons at the bottom, the default button (interfaceBuilder) and one using two png images from the Apple UICatalog.
I am a little shocked that apple did not include something a little more stylish in IB. I assume that my only option is to find/use/make a suitable replacement button image. Before I fire up Photoshop does anyone know of any replacement buttons I might use?
gary
What you can do is use a segmented control with just one segment - you get the shading you want and it's not much harder to use than a standard button.
If you want to try out some button designs, you can draw them in Opacity, which includes a template for iPhone buttons. Opacity can output the button as a stretchable PNG for use in the button or as a UIView / UIButton subclass with all the Quartz drawing calls within it.
I recommend having a look into the Three20 library. It provides a TTButton class that can be customized using TTStyles, and its very easy to create your own styles. In the Three20 example app, there are a lot of styles available already, especially styles for navigation bar buttons. They serve as great examples.
I have a bunch of texts and images (taken from the content tag of a RSS feed item) that I want to display in my app. I've managed to extract them from the entire content tag with some regular expressions. But the thing is, in order for the texts to appear before all the images are loaded, I need to preload all the images, and even more, I need to reposition all the texts/images when an image is loaded, because I don't know their size at first, to position the element under them correctly.
I realized this is too much hard-work for such a simple task.
I searched for some simple HTML wrapper but I found nothing. And than I realized: hey, I can insert HTML directly into an UIWebView. But then again, I see UIWebView more like an iFrame in HTML, and by that I mean not a very flexible/fluid element. The content will be bigger than the iPhone screen height, can the UIWebView adjust to fit it's contents? I don't want the browser zoom features and all, but rather to blend in the page.
So bottom line: In order to display a bunch of texts combined with images, should I continue with my initial pain-in-the-ass method, should I use a UIWebView, or is there another simple element like the one in my dreams? :)
Thanks.
Definitely use the web view; it has hundreds of person-years of work behind it, and is realistically impossible for you to reproduce by yourself. To keep it from zooming, you can add a viewport meta tag to your HTML fragment.
...[S]hould I continue with my initial pain-in-the-ass method, should I use a UIWebView, or is there another simple element like the one in my dreams...
I'm not entirely sure what you have against UIWebView, it's a decent and fairly complex element that can support many behaviors. One of the extremely attractive properties of IB and Cocoa development is that prototyping is very quick. I think you should spend half an hour and play around with the component. Writing your own code is definitely an option, but layout engines (ie WebKit in UIWebView/Safari, or Gecko in Firefox) is a complicated task. Why reinvent the wheel?
HTH.