iOS Wait Screen or Alert?

[CNuland]

My app uploads data to a web server and I was wanting to have a wait screen pop up until it is done uploading. Is there a way to make an alertview without a cancel button, and then delete it after? Or maybe a better way to approach this matter?

Thanks for the help as always.

-CNuland

 

[dejo]

If you are really wanting to block the UI whilst the upload happens (something I wouldn't recommend), I would suggest a UIActivityIndicatorView or a UIProgressView presented modally.

 

[CNuland]

Well, the user can't do anything while the upload happens anyway, as the IU is frozen while the upload is going on. I just want a pop up screen to let them know when the upload is finished. Though I'm completely open to suggestions. I will look into what you mentioned first though.

 

[CNuland]

The UIActivityIndicatorView did not work. It seems that while

NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];

is uploading the information, the UIActivityIndicatorView quits processing. I removed that line of code and then the timer and UIActivityIndicatorView work fine. Does anyone else have any suggestions?

 

[seepel]

How about

connectionWithRequest:delegate:

for an asynchronous request?

 

[CNuland]

Alright, thanks for the advice. I've been researching the difference between asynchronous and synchronous, but I'm having issues implementing that into my code. Here's what I have right now.

-(IBAction) uploadImages {
	for (AnnotatedImage* image in images) {

		NSData *imageData = UIImageJPEGRepresentation(image.image, .1);
		// setting up the URL to post to
		NSString *urlString = @"*********";
		// setting up the request object now
		NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:urlString] cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0];
		[request setURL:[NSURL URLWithString:urlString]];
		[request setHTTPMethod:@"POST"];

		NSString *boundary = [NSString stringWithString:@"---------------------------14737809831466499882746641449"];
		NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary];
		[request addValue:contentType forHTTPHeaderField: @"Content-Type"];
		

		NSMutableData *body = [NSMutableData data];
		[body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]]; 	
		[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"fileName\"; filename=\"%@\"\r\n",image.name] dataUsingEncoding:NSUTF8StringEncoding]];  
		[body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]]; 	
		
		
		[body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]]; 	
		[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"fileDesc\"; filename=\"%@\"\r\n",image.description] dataUsingEncoding:NSUTF8StringEncoding]];  
		[body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]]; 
		
		
		
		[body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
		[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"userfile\"; filename=\"%@.jpg\"\r\n",image.name] dataUsingEncoding:NSUTF8StringEncoding]];  
		[body appendData:[[NSString stringWithString:@"Content-Type: application/octet-stream\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
		[body appendData:[NSData dataWithData:imageData]];
		[body appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
		// setting the body of the post to the reqeust
		
		
		[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"customerID\"\r\n\r\n%@", test] dataUsingEncoding:NSUTF8StringEncoding]];  
		[body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]]; 	
		[request setHTTPBody:body];
		
		// now lets make the connection to the web
		NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
		NSString *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];
		NSLog(returnString);
		
	}
}

I tried changing the NSData *returnData to use the initWithRequest, but it doesn't work. Compiles fine, just doesn't send. Does anyone have any advice or possibly point me in the right direction? Thanks.

 

[dejo]

I tried changing the NSData *returnData to use the initWithRequest, but it doesn't work.

You need to use initWithRequest:delegate: if you want it asynchronous. Then you'll also need to have your delegate methods set up to handle the response.

 

[CNuland]

Alright, I got it working, thanks so much for your help!

 

[dejo]

Alright, I got it working, thanks so much for your help!

You're welcome.

 

[Macjonh]

Hi, I'm new on this forum but I have almost the same code as you. But can you pleas copy paste your code because I'm struggling with the same problem. And how did you do the asynchronous upload?