iOS Touch in scrollview

[Binju]

I need to dedect touch in the imageview,When the user swipe the image i need to find which is the current image in the imageview and i want to save it.



.Pls check the attachment

 

[AndyCodez]

I did something similar to this, except i decided to use buttons instead of uiimageviews. So you don't really need to worry about detecting touch on the object. Then basically I added the button with the scroll view each button had the image set to what was needed. Then when you press the button you do something like

-(ibaction) btnImagePress:(id) sender
{
       UIButton *btn = (UIButton*) sender;
       self.selectedImage = sender.image;
}

or something along those lines, just pulled that from my crappy memory so forgive me lol.

 

[Binju]

I wrote the below code for adding images in the button and scroll.

But the buttons are not scrolling

- (void)viewDidLoad {
    [super viewDidLoad];
	
	
	
	
	
	[self playaudios];
	
	
	
	[btnimage setImage:image1 forState:UIControlStateNormal];
	[scrollView1 setBackgroundColor:[UIColor blackColor]];
	[scrollView1 setCanCancelContentTouches:YES];
	scrollView1.delaysContentTouches=YES;
	scrollView1.indicatorStyle = UIScrollViewIndicatorStyleWhite;
	scrollView1.clipsToBounds = YES;		// default is NO, we want to restrict drawing within our scrollview
	scrollView1.scrollEnabled = YES;
	
	// pagingEnabled property default is NO, if set the scroller will stop or snap at each photo
	// if you want free-flowing scroll, don't set this property.
	scrollView1.pagingEnabled = YES;
	
	// load all the images from our bundle and add them to the scroll view
	NSUInteger i;
	
	NSLog(@" ImageLoad&&&&&&&&&&&&&");
	for (i = 1; i <= kNumImages; i++)
	{
		NSString *imageName = [NSString stringWithFormat:@"movimg%d.png", i];
		UIImage *image1 = [UIImage imageNamed:imageName];
		UIButton *btnimage = [[UIButton buttonWithType:UIButtonTypeCustom] retain];

		[btnimage setImage:image1 forState:UIControlStateNormal];
		//btnimage.image=image;
		//imageView = [[UIImageView alloc] initWithImage:image];
		//[imageView setUserInteractionEnabled:YES];
		[scrollView1 setUserInteractionEnabled:YES];
		// setup each frame to a default height and width, it will be properly placed when we call "updateScrollList"
		
		NSLog(@"Image11111111....................");
		CGRect rect = btnimage.frame;
		rect.size.height = kScrollObjHeight;
		rect.size.width = kScrollObjWidth;
		NSLog(@"Image222222222....................");
		btnimage.frame = rect;
		btnimage.tag = i;
		NSLog(@"Image333333333....................");// tag our images for later use when we place them in serial fashion
		[scrollView1 addSubview:btnimage];
		NSLog(@"Image444444444....................");
		[btnimage release];
		NSLog(@"Image555555555....................");
	}
	
	[self layoutScrollImages];	
}	


- (void)layoutScrollImages
{
	
	NSLog(@"layoutScrollImages");
	UIButton *view = nil;
	NSArray *subviews = [scrollView1 subviews];
	NSLog(@"layoutScrollImages1111111111111");
	// reposition all image subviews in a horizontal serial fashion
	CGFloat curXLoc = 0;
	
	NSLog(@"layoutScrollImages222222222222222");
	for (view in subviews)
	{
		if ([view isKindOfClass:[UIButton class]] && view.tag > 0)
		{
			CGRect frame = view.frame;
			frame.origin = CGPointMake(curXLoc, 0);
			view.frame = frame;
			
			curXLoc += (kScrollObjWidth);
		}
		
		NSLog(@"curXLoc.........=%f",curXLoc);
	}
}

 

[AndyCodez]

do some calculations to get size needed for all your objects need to be displayed.

scrollview.contentsize = cgsize();

i believe that is the proper code. (just doing it from the top of my head) Content size will show how far the scrollview will scroll.

 

[marlenez]

Here's an example of a scrollview with buttons...

Note that the frame is the size of the scrollview itself but the content size is the maximum for the amount of buttons you will be adding - you can make this any size that you want whether you are placing buttons, labels, images, etc. in the scrollview.

CGRect frame = CGRectMake(0, 0, 320, 60);
	
	
	scrollViewA = [[UIScrollView alloc] initWithFrame:frame];
	scrollViewA.showsHorizontalScrollIndicator = YES;
	scrollViewA.delaysContentTouches=NO;
	scrollViewA.clipsToBounds = YES;
	[scrollViewA setContentSize:CGSizeMake(640, 60)];
										   
	[self.view addSubview:scrollViewA];