Tiny question (LaunchMe sample code related)

[celebi23]

You know in the "LaunchMe" sample code how you can open Safari & it'll go to apple.com by default? Is there any way to make a UIButton have that function, without all of the messageAlert stuff from LaunchMe? I'm pretty much trying to get a UIButton to open a link to my website in MobileSafari

[BlackWolf]

sure.
you have to use the addTarget:action:forControlEvents method on the button so the button invokes a method when it is clicked.
in that method you just write

[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"http://yoururl.com"]];

and it should work. I never tried it, I'm just guessing from the LaunchMe-Code, but I guess that should work.

[celebi23]

Something like this maybe?

}
- (void)imagePressed:(UIImage *)imagePressed didDismissWithButtonIndex:(NSInteger)buttonIndex
{
    if (buttonIndex != -1) {
        // Open Safari only if the user clicked the 'Launch Safari' button, but not if this
        // delegate method is called by UIKit to cancel it. In that case, buttonIndex is -1.
        [[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"mailto:_____________"]];
    }
	[imagePressed release];
}

It produces no error but, doesn't launch the url when the button is clicked

Here's the code for the button mentioned above

	#pragma mark
	#pragma mark White Button
	#pragma mark
	// create the UIButtons with various background images
	// white button:
	UIImage *buttonBackground = [UIImage imageNamed:@"whiteButton.png"];
	UIImage *buttonBackgroundPressed = [UIImage imageNamed:@"blueButton.png"];
	frame = CGRectMake(xCoord, 300, kStdButtonWidth, kStdButtonHeight);	
	[self addButtonWithTitle:	@"eMail Me"
								selector:@selector(action:)
								frame:frame
								image:buttonBackground
								imagePressed:buttonBackgroundPressed
								darkTextColor:YES];

[BlackWolf]

Originally Posted by celebi23

Something like this maybe?

}
- (void)imagePressed:(UIImage *)imagePressed didDismissWithButtonIndex:(NSInteger)buttonIndex
{
    if (buttonIndex != -1) {
        // Open Safari only if the user clicked the 'Launch Safari' button, but not if this
        // delegate method is called by UIKit to cancel it. In that case, buttonIndex is -1.
        [[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"mailto:_____________"]];
    }
	[imagePressed release];
}

It produces no error but, doesn't launch the url when the button is clicked

Here's the code for the button mentioned above

	#pragma mark
	#pragma mark White Button
	#pragma mark
	// create the UIButtons with various background images
	// white button:
	UIImage *buttonBackground = [UIImage imageNamed:@"whiteButton.png"];
	UIImage *buttonBackgroundPressed = [UIImage imageNamed:@"blueButton.png"];
	frame = CGRectMake(xCoord, 300, kStdButtonWidth, kStdButtonHeight);	
	[self addButtonWithTitle:	@"eMail Me"
								selector:@selector(action:)
								frame:frame
								image:buttonBackground
								imagePressed:buttonBackgroundPressed
								darkTextColor:YES];

well, yeah, that can't really work. I would be surprised if that doesn't produce any errors.
first of all: there is no such thing as a "imagePressed"-method. just because there is a method for UIAlertView-Buttons for that that doesn't mean a method like that exists for everything. there is no imagePressed-method and therefore it is never invoked.
secondly: there is no addButtonWithTitle: method. I mean there is one, but only to add buttons to a UIViewAlert, not to add buttons to anything else. so there is no such thing.
I would heavily advise you to just search the iPhone OS documentation for those things next time, because you find really all the infos you need there (help->xcode documentation or something like that in xcode).
what you have to do: create a UIButton object (for that look for UIButton in the iPhone OS Docs) and then use addTarget:action:forControlEvents on that button (look for that method in the docs).
you can look at the "Hello World" example from apple to see how buttons work and how you notice a click on a button.

regards

[celebi23]

Originally Posted by BlackWolf

well, yeah, that can't really work. I would be surprised if that doesn't produce any errors.
first of all: there is no such thing as a "imagePressed"-method. just because there is a method for UIAlertView-Buttons for that that doesn't mean a method like that exists for everything. there is no imagePressed-method and therefore it is never invoked.
secondly: there is no addButtonWithTitle: method. I mean there is one, but only to add buttons to a UIViewAlert, not to add buttons to anything else. so there is no such thing.
I would heavily advise you to just search the iPhone OS documentation for those things next time, because you find really all the infos you need there (help->xcode documentation or something like that in xcode).
what you have to do: create a UIButton object (for that look for UIButton in the iPhone OS Docs) and then use addTarget:action:forControlEvents on that button (look for that method in the docs).
you can look at the "Hello World" example from apple to see how buttons work and how you notice a click on a button.

regards

THANK YOU!!!!!!! I finally got the email button to work 1 major feature down, 1 more major one left to got & then I'm all set for version 1.0 of my app

I do have 1 other question though, I'm using the HelloWorldClassi app as a base & I'm trying to get whatever text I enter to be entered into Google

//This method is invoked when the Hello button or return key is touched
- (void)hello:(id)sender
{
    [self.textField resignFirstResponder];
    NSString *nameString = self.textField.text;
	[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"http://www.google.com/search?hl=en&q=",nameString]];
}

But, I keep on getting this one error

error: too many arguments to function 'URLWithString:'

Any ideas?

[CyberGreg]

Originally Posted by celebi23

THANK YOU!!!!!!! I finally got the email button to work 1 major feature down, 1 more major one left to got & then I'm all set for version 1.0 of my app

I do have 1 other question though, I'm using the HelloWorldClassi app as a base & I'm trying to get whatever text I enter to be entered into Google

//This method is invoked when the Hello button or return key is touched
- (void)hello:(id)sender
{
    [self.textField resignFirstResponder];
    NSString *nameString = self.textField.text;
	[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"http://www.google.com/search?hl=en&q=",nameString]];
}

But, I keep on getting this one error

error: too many arguments to function 'URLWithString:'

Any ideas?

Indeed there are too many arguments... notice your "," before nameString. I would suggest you build your complete URL variable and then use that in your "URLWithString" statement.

Something like.... (mind you I have no idea if it works...)

    NSString *nameString = [[NSString string] stringByAppendingString: @"http://www.google.com/search?hl=en&q=" 
    stringByAppendingString: self.textField.text];
    [[UIApplication sharedApplication] openURL:[NSURL URLWithString:nameString]];

Here's how my navbar buttons call my help page and my donate page:

	case 1:	//
		switch( aButton )
		{
			case 0:	{
				NSURL *donateURL = [NSURL URLWithString:DONATE_URL_STRING];
				[self openURL:donateURL];
				[self terminate];
				break; //Donate
			}
			case 1: {
				NSString *helpLink = [NSURL URLWithString:INFO_URL_STRING];
				[self openURL:helpLink];
				[self terminate];
				break; //FAQ
				}
		}
		break;
	}

Where both "*_URL_STRING"'s are constants set in the header file.