I want to be clear that I do not need help with page curl animation.
I am trying to find the best way to add a "page curl" image effect to the bottom of one my views. Similar to the iPad maps app.
Here is an example:
Of course, once this area is hit, the page curls. Easy enough.
I am thinking that it would be using some Quartz to draw?
I have even thought about doing a small curl animation to get it to there but that seems a bit dirty.
Thank you for your time!
Can you not just add a image file as a button in the corner to simulate a page curl?
Related
I am making a single view application in Xcode and I am having a little trouble*(By little I mean BIG trouble!)
I wanted to make a clone of the Apple's News app home page where the buttons are are blurry than come to focus.I want to use that effect for three different ui elements.I have been trying for days but no success. :(
Is there a way of doing the blur than focus animation to a label a button And image view? If so can you please guide me on how to do it?
Thank you for your time.
I know how to use qlpreviewcontroller, but i am curious to learn what actually happened behind the scene of the controller. I am looking for a way to implement my own custom preview controller that allows me to do paginated swipe, horizontal layout, programmatically scroll to page, etc. the issue really is being able to crack open the files and extract them as an image. I know that there are services that allow you to do so, but i prefer a client side solution if possible
Anyone have any suggestion / insight?
Goodmorning all,
In some cases I need to present a lot of alert dialog (overlapped on each other). At the moment i can't find another way to do this because i need to take trace of each user's answer for each question in my dialogs.
So, after 5-6 dialog overlapped i've something like this:
my interface is faded out till to black, there is a way to avoide it?
Thanks all in advance.
That happens because the alert has a slight transparent black background which appears on top of the view. The things is since you add a lot of them, at this point this translucent backgrounds they get combined and you get the non-transparent black one.
One alternative would be to not present the alerts all at once but in sequence. So when the first one is dismissed, you present the next one and so on.
Another alternative would be to write your own custom alerts. Then you could control the background as would be fit your application.
However, it does not seem you are using the alerts for what they are supposed to be used, which is errors or messages the user must know. Maybe there is another solution for you application, maybe using a form or something similar. They are quite an intrusive way to interact with an application, so they should be used accordingly.
Hope this helps and you get to figure out the best solution for your project. Good luck!
ok guys im not to shure where to start with this one its a first for me but i have a floor plan that i would like to show in my IOS7 App and i know i want the user to shrink and grow the image so he or she can zoom in to areas of the map. it would be nice if they could click on the an area of the image and it would be linked to data in my parse database. but i think thats a long way off for me.....
but for now just to let the user shrink and grow and rotate the image would be nice.
anyone got any tutorials they can point me to?
Have a look at Apple's PhotoScroller example. Here an ARC-ready version.
This will not cover rotating the image, but you can easily get this by following this tutorial.
I'd need to create a iPad-app which would be rendering multiple PDF-Files (one file contains one page).
Each page should be scrollable, zoomable and if the user taps on a part of the PDF a website or photo gallery should popup.
Currently i think i could do that either with:
A. UIWebView
Displays the pdf's nicely, scrolling and zooming works. But it looks like a lot of trouble to realize the clickable parts of the PDF.
I don't know if i could use CGPDFContextSetURLForRect
Getting the touch-events from UIWebView to do something like CGPDFContextSetURLForRect my self looks like it would be some "quite bad" hack. See: http://github.com/psychs/iphone-samples/blob/master/WebViewTappingHack/Classes/PSWebView.m
B. Quartz
I found some resources describing how to display PDF's directly via Quartz.
See:http://developer.apple.com/iphone/library/documentation/GraphicsImaging/Conceptual/drawingwithquartz2d/dq_pdf/dq_pdf.html
This would allow using CGPDFContextSetURLForRect
But i have no idea if this would - like UIWebView - support scrolling and zooming out of the box?
Anybody could enlighten me on this please?
Thanks for your time!
[Edit: changed 3.0 to 3.2]
[Edit: my "solution"]
Hi!
I could come up with a working implementation for PNG but not for PDF's.
[Abstract]
My sollution was Rendering the content, intercepting the touches on it, retreiving the coordinates relative to the displayed content if it is one touch and finally looking up what to do from a mapping containing the interactive areas as coordinates and what to do if they get clicked.
[For PNG]
It was way more cumbersome to implement somethink like that than i would have imagined...
And the implementation i got working depends heavily on the content you want to display because this does work for UIImageView but i could not get it working with UIWebView.
First you need a UIScrollView and UIImageView to render the content and support scrolling/zooming.
Then you need to implement some handling to get the touches/gestures you are interested in.
See: developer.apple.com/iphone/library/samplecode/ScrollViewSuite/Listings/1_TapToZoom_Classes_TapDetectingImageView_h.html
This sample from apple provides everything you need to get this part working.
As a bonus it also takes care about transforming the coordinates relative to the viewport of the content which is very handy! (else you would only know where the tap happend on the screen wich only one half of the info you need if your content is zoom-/scrollable)
[For PDF]
If you want to do this with PDF the first thing would be that you need to use a UIWebView (probably you could do it via Quartz or something else too)
Getting the touches with a UIWebView is a real pain!
There are a lot of ways proposed on the web and besides one noone did what it should do.
After days of googling i found this gem: cocoawithlove.com/2009/05/intercepting-status-bar-touches-on.html
So... subclassing UIWebView does not get you anywhere unlike UIImageView and you have to subclass UIApplicationMain and implement its method for handling touch-events.
Here you could reuse some of the "Touch-Handling-Stuff" from the apple-examlpe from above.
Now you would need to translate the coordinates of the touch to your content if it is zoom-/scrollable. UIWebView DOES NOT do this for you unlike UIImageView!
I could never figure out how to get the required information(what part of the content at which zoomlevel) from a UIWebView to translate the coordinates but due to the changed requirements from PDF to PNG i didn't care to get it working too much.
hope this helps.
Using the CGPDF* operators will allow you to write a UIPDFView, which operates exactly as UIImageView but uses a PDF as the source image. Create your own custom subclass of UIView and implement drawRect: to, eventually, call CGContextDrawPDFPage. Based on a quick Google search (because I know the keywords), this page seems to explain that side of things quite well.
You can then directly substitute your custom UIView subclass for the UIImageView and proceed exactly as you have with the PNG solution.