Sparrow Forum

1. 

   arenduch
   Member

   Hi, I am iphone and sparrow noob, and im sorry if this has been explained before.
   I am trying to create a simple flickr image viewer, and not able to figure out how to load an SPImage form a url.

   Any suggestions?

   thanks

   Posted 1 year ago #
2. 

   Shilo
   Master Sparrow

   Hi,

   I created a tutorial for that, you will have to dig into Sparrow source and get your hands alittle dirty though. It's not hard though.

   You can find the tutorial here: http://shilo.coarsemode.com/sparrow/addons/#8A

   Once you are done with the tutorial, there are 2 methods you can use.

   1. [SPImage imageWithContentsOfWebFileBlocked:@"URL_HERE"]
   This method will block the main thread until the image fully loads. I don't recommend this method, but it should be fine if you call this method on the initialization of your stage and the image is relatively small.

   2. [SPImage imageWithContentsOfWebFile:@"URL_HERE"]
   This method will not block the main thread and it will dispatch an event when the image is loaded. I recommend this method.

   Here is an example:

    
   - (id)initWithWidth:(float)width height:(float)height {
   	if (self = [super initWithWidth:width height:height]) {
   		NSString *sparrowLogoPath = @"http://www.sparrow-framework.org/wp-content/uploads/2010/03/sparrow-logo.png";
    
   		//initialize image1 and add event handler for when it loads
   		SPImage *image1 = [SPImage imageWithContentsOfWebFile:sparrowLogoPath];
   		[image1 addEventListener:@selector(onImage1Loaded:) atObject:self forType:SP_EVENT_TYPE_IMAGE_LOADED];
   		[self addChild:image1];
    
   		//initialize image2 and wait for it to load
   		SPImage *image2 = [SPImage imageWithContentsOfWebFileBlocked:sparrowLogoPath];
   		[self addChild:image2];
   	}
   	return self;
   }
    
   - (void)onImage1Loaded:(SPEvent *)event {
   	SPImage *image1 = (SPImage *)event.target;
   	[image1 removeEventListener:@selector(onImage1Loaded:) atObject:self forType:SP_EVENT_TYPE_IMAGE_LOADED];
   	//modify image1 after it has loaded
   }

   Posted 1 year ago #
3. 

   arenduch
   Member

   Thanks a lot shilo! I got it working now.

   Posted 1 year ago #

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