Passing URL into method - iphone

Question

Hi i have a question here,
i'm able to get the UrL string store in "imageName" variable successfully in showImage method.
I need to do the same in this method "segmentedControlIndexChanged" but i cant get the variable "imageName".
Is there anyway i can declare the IBAction method to work similarly as the showImage method?
I Tried ->" -(IBAction) segmentedControlIndexChanged:(NSString *)imageName{} " but it cant work, i'm unable to get the variable "imageName".
- (void) showImage:(NSString *)imageName
{
NSData *imageData;
//NSString * string1 = [NSString stringWithFormat:imageName];
imageData = [[NSData alloc] initWithContentsOfURL:[NSURL URLWithString:imageName]];
//NSLog(#"%#",imageName);
image = [[UIImage alloc] initWithData:imageData];
self.imageView.image = image;
[imageView setFrame:CGRectMake(5, 10, image.size.width, image.size.height)];
[scrollview setScrollEnabled:YES];
if(image.size.height+20 >= 224)
{
[scrollview setContentSize:CGSizeMake(289, image.size.height + 20)];
}
else {
[scrollview setContentSize:CGSizeMake(289, 224)];
}
}
////////
-(IBAction) segmentedControlIndexChanged{
switch (self.segmentedControl.selectedSegmentIndex) {
case 0:
image = [UIImage imageNamed:image1name];
self.imageView.image = image;
[imageView setFrame:CGRectMake(5, 10, image.size.width, image.size.height)];
[scrollview setScrollEnabled:YES];
if(image.size.height+20 >= 224)
{
[scrollview setContentSize:CGSizeMake(289, image.size.height + 20)];
}
else {
[scrollview setContentSize:CGSizeMake(289, 224)];
}
break;
case 1:
image = [UIImage imageNamed:image2name];
self.imageView.image = image;
[imageView setFrame:CGRectMake(5, 10, image.size.width, image.size.height)];
[scrollview setScrollEnabled:YES];
[scrollview setContentSize:CGSizeMake(289, image.size.height+20)];
break;
case 2:
image = [UIImage imageNamed:image3name];
self.imageView.image = image;
[imageView setFrame:CGRectMake(5, 10, image.size.width, image.size.height+1)];
[scrollview setScrollEnabled:YES];
[scrollview setContentSize:CGSizeMake(289, image.size.height+20)];
break;
default:
break;
}
}
EDIT
I have encountered Bad Access error, anyone knows what does it mean or can anyone show me some ways to solve it?

Answer 1

No, an IBAction can only have one of the following three signatures in iOS:
- (void)action
- (void)action:(id)sender
- (void)action:(id)sender forEvent:(UIEvent *)event
EDIT
You could extend UIButton to store the value you need, like:
#interface MyButton : UIButton {
}
#property (nonatomic, retain) NSString *url;
#end
...
#implementation MyButton
#synthesize url;
#end
...
- (void)buttonTapped:(id)sender {
MyButton *button = (MyButton *)sender;
UIImage *image = [UIImage imageNamed:button.url];
...
}
EDIT
You can use tags to differentiate between different senders, like
enum {
ButtonOneTag = 128,
ButtonTwoTag,
...
}
...
- (void)buttonTapped:(id)sender {
UIButton *button = (UIButton *)sender;
switch(button.tag) {
case ButtonOneTag:
NSLog(#"Button One Tapped");
break;
case ButtonTwoTag:
NSLog(#"Button Two Tapped");
break;
}
You can also just compare the sender to ivars for the buttons like so:
- (void)buttonTapped:(id)sender {
//assuming buttonOne and buttonTwo are IBOutlets on this class
if (sender == self.buttonOne) {
NSLog(#"Button One Tapped");
else if (sender == self.buttonTwo) {
NSLog(#"Button Two Tapped");
}
...
}