I need to create an horizontal list with a scroll, this list is made of 10 images, in the screen only fits 1 and a half of these images, so when the user scroll i need to set at the center of the screen an image and besides it a portion on the forward image and backward image. So far what i have is this:
scroll = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 150, 1024, 520)];
scroll.delegate = self;
scroll.pagingEnabled = NO;
int numberOfViews = 10;
float xOrigin = 0;
for (int i = 0; i < numberOfViews; i++) {
xOrigin = i * 600;
FigureImage *tape = [[FigureImage alloc] initCustom];
[scroll addSubview:tape];
FigureImage *pictureFigure = [[FigureImage alloc] initCustom];
[scroll addSubview:pictureFigure];
}
scroll.contentSize = CGSizeMake(numberOfViews*10, 500);
pageWidth = (numberOfViews*10)/numberOfViews;
[self.view addSubview:scroll];
With this code i am able to scroll the images, but the scroll doesnt stop at any particular image, how can i able the last x position to stop the scrolling?
See the delegate method -scrollViewWillEndDragging:withVelocity:targetContentOffset:.
Its last parameter is an in-out CGPoint whose value you can change so that the scroll comes to rest with an image centered exactly.
Related
How do you make a menu like in Cut the Rope game. Image below:
I am able to make three images slide horizontally but failed to make it as a button.
Though I don't need it to be fancy as the game's, but just a simple button.
Do I need to stack three different Views with its respective buttons inside UIScrollView? I am leaning towards doing it programmatically though.
Code: http://pastebin.com/ikrJ1U7w
Its actually a UIScrollView which containing UIButton of custom type & has image on that. Below that is UIPageIndicator.
You can create it as below, althouh also search for
How to create UIButton programatically to add on scrollview
In your view controller,
In viewDidLoad, in scrollView add the buttons.
UIScrollView *scrollView = // initalize & set frame as per ur req
scrollView.userInteractionEnabled = YES;
scrollView.pagingEnabled = YES;
float x = 0.0;
float y = 0.0, width = 320.0;
float height;
for (int j = 0; j <= numberofpagesYouwant; j++)
{
CGRect frame;
UIButton *button = // Create a button at here;
frame = CGRectMake(x, y, width, height); // Use this as your button frame
[scrollView addSubview:button];
[button release];
x = x + width;
}
scrollView.contentSize = CGSizeMake(numberOfPagesYouHave * 320, heightOfYourScrollView);
}
-(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
{
CGFloat pageWidth = self.scrollView.frame.size.width;
int page = floor((self.scrollView.contentOffset.x - pageWidth / 2) / pageWidth) + 1;
if(page != activityIndicator.currentPage)
{
NSLog(#"now page change:%d",page);
[self changePageIndicator:page];
}
}
-(void)changePageIndicator:(int)index
{
activityIndicator.currentPage = index;
}
- (void)setNumberOfPages:(int)numPages1
{
activityIndicator.numberOfPages = numPages1;
}
Yes, I am pretty sure this is just several buttons placed on top of some sort of a scrollView. (most likely done programatically).
I need to create a horizontal UIScrollView which to hold hundreds of thumbnail images, just like a slide of thumbnails.
For example, there will be 10 thumbnails showing in a single screen, each of them are horizontally adjacent to each other.
My problem is that I don't know how to make a horizontal UIScrollView to hold the multiple thumbnails which showing at the same time ?
A sample photo is as below. See the bottom part of the screen.
Thanks.
You can add all the thumbnails programatically to your scrollview and use the setContentSize method of UIScrollView. you have to pass 2 values in contentOffset. 1 for width and 1 for height. Please follow link to explore more on this. If you need further help please leave a comment.
Hope it helps.
Please consider Following example.
- (void)setupHorizontalScrollView
{
scrollView.delegate = self;
[self.scrollView setBackgroundColor:[UIColor blackColor]];
[scrollView setCanCancelContentTouches:NO];
scrollView.indicatorStyle = UIScrollViewIndicatorStyleWhite;
scrollView.clipsToBounds = NO;
scrollView.scrollEnabled = YES;
scrollView.pagingEnabled = YES;
NSUInteger nimages = 0;
NSInteger tot=0;
CGFloat cx = 0;
for (; ; nimages++) {
NSString *imageName = [NSString stringWithFormat:#"image%d.jpg", (nimages + 1)];
UIImage *image = [UIImage imageNamed:imageName];
if (tot==15) {
break;
}
if (4==nimages) {
nimages=0;
}
UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
CGRect rect = imageView.frame;
rect.size.height = 40;
rect.size.width = 40;
rect.origin.x = cx;
rect.origin.y = 0;
imageView.frame = rect;
[scrollView addSubview:imageView];
[imageView release];
cx += imageView.frame.size.width+5;
tot++;
}
self.pageControl.numberOfPages = nimages;
[scrollView setContentSize:CGSizeMake(cx, [scrollView bounds].size.height)];
}
I suggest you to look at nimbus
Check out bjhomer's HSImageSidebarView project. It lets you load a scrollview horizontally or vertically and load in the images. Super easy to implement.
First of all, at storyboard drag and drop the scroll view and make the outlet of scrollview named scrollView. Two array one is mutable and one is immutable.
#property(nonatomic,strong)IBOutlet UIScrollView *scrollView;
#property(nonatomic,strong)NSMutableArray *images;
#property(nonatomic,strong)NSArray *imagesName;
The immutable array only store the images which we want to show on the scroll view.Make sure UIscrollview delegate is defined.
In viewcontoller.m file in didload function do following code:
imagesName = [[NSArray alloc]initWithObjects:#"centipede.jpg",#"ladybug.jpg",#"potatoBug.jpg",#"wolfSpider.jpg", #"ladybug.jpg",#"potatoBug.jpg",#"centipede.jpg",#"wolfSpider.jpg",nil];
// mutable array used to show the images on scrollview dynamic becaus after one
// image when scroll other will come
images = [[NSMutableArray alloc]init];
scrollView.delegate = self;
scrollView.scrollEnabled = YES;
int scrollWidth = 120;
scrollView.contentSize = CGSizeMake(scrollWidth,80);
int xOffset = 0;
//the loop go till all images will load
for(int index=0; index < [imagesName count]; index++)
{
UIImageView *img = [[UIImageView alloc] init];
// make the imageview object because in scrollview we need image
img.frame = CGRectMake(5+xOffset, 0, 160, 110);
// the offset represent the values, used so that topleft for each image will
// change with(5+xOffset, 0)and the bottomright(160, 110)
NSLog(#"image: %#",[imagesName objectAtIndex:index]);
img.image = [UIImage imageNamed:[imagesName objectAtIndex:index]];
// The image will put on the img object
[images insertObject:img atIndex:index];
// Put the img object at the images array which is mutable array
scrollView.contentSize = CGSizeMake(scrollWidth+xOffset,110);
//scroll view size show after 125 width the scroll view enabled
[scrollView addSubview:[images objectAtIndex:index]];
// set images on scroll view
xOffset += 170;
}
You can calculate content size width of the scrollview as width = number of images * size of each image. Then set contentSize of the scrollview to this width and the height that you want (scrollView.contentSize = CGSizeMake(width, height))
I have different number of photos in tableview custom cell.Now i want to display that photos
on next page.4 photos per line.how can i do that?
You can use a UIScrollView for this...
Each item in your grid is a UIImageView which you add as subviews to your UIScrollView.
The following code can be insterted in viewDidLoad inside your view controller and assumes that you have setup your UISCrollView in interface builder, otherwise you would need to allocate your scroll view inside viewDidLoad.
The code will add a variable number of image items to a UIScrollView with 4 columns.
UIImageView *imageView = nil;
//The x and y view location coordinates for your menu items
int x = 0, y = 0;
//The number of images you want
int numOfItemsToAdd = 10;
//The height and width of your images are the screen width devided by the number of columns
int imageHeight = 320/4, imageWidth = 320/4;
int numberOfColumns = 4;
//The content seize needs to refelect the number of items that will be added
[scrollView setContentSize:CGSizeMake(320, imageHeight*numOfItemsToAdd];
for(int i=0; i<numOfItemsToAdd; i++){
if(i%numberOfColumns == 0){//% the number of columns you want
x = 0;
if(i!=0)
y += imageHeight;
}else{
x = imageHeight;
}
imageView = [[UIImageView alloc] initWithFrame: CGRectMake(x, y, imageWidth, imageHeight)];
//set the center of the image in the scrollviews coordinate system
imageView.center = CGPointMake(x, y);
imageView.image = [UIImage imageNamed:#"my_photo.png"];
//Finaly add the image to the scorll view
[scrollView addSubview:imageView];
I have ScrollView and UIView created in interface builder (but can as well be code). I want to add random amount of thumbnails (subviews) to UIView and be able to scroll it up-down if there are more than the screen can take. Hovewer, I can't get ScrollView to scroll.
Where and how do I resize UIView and add it as a subview of ScrollView?
When do I set contentSize of scrollView to make it expand along with uiview? I tried creating fixed large contentSize but didn't work as well.
What properties in IB I might need to change to make it work?
I'd like to make the images in uiview clickable in next step.
I guess I could also make both view in code without IB. Just somehow can't get it to work.
Thanks in advance !
//declare base view
UIViewController *viewForLoadForm =[[UIViewController alloc] init];
viewForLoadForm.view.frame=CGRectMake(0, 0,screenSize.size.width,screenSize.size.height);
viewForLoadForm.view.backgroundColor=[UIColor blackColor];
[Manview.view addSubview:viewForLoadForm];
//declare scrollview and add to base view
UIScrollView *scrollview=[[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, screenSize.size.width,screenSize.size.height)];
scrollview.indicatorStyle=UIScrollViewIndicatorStyleBlack;
[scrollview setContentSize:CGSizeMake(screenSize.size.width,screenSize.size.height)];
scrollview.clipsToBounds = NO;
scrollview.scrollEnabled = YES;
scrollview.pagingEnabled = NO; scrollview.showsVerticalScrollIndicator =NO;
scrollview.alwaysBounceVertical= YES;
[viewForLoadForm.view addSubview:scrollview];
//Add your controls to scrollview that s image view or something which is needed to display
.........your control's code (textbox,imageview etc)
//took last control's y postion and set your K
float k=Last control's y position +100;(some thing which ll be decide scroll size)
// reassign the scrollview height
[scrollview setContentSize:CGSizeMake(screenSize.size.width,k)];
use above line for scroll view size adjustment at run time.
screenSize.size.width is 320 here
code snippet,
- (void) createThumbView
{
float y_axis = Set y axis;
int x = 0;
int totalImgs = total images;
int tempCnt = 0;
for (int i = 0; i < totalImgs;)
{
float x_axis = set x axis;
int loopCount = 0;
if (totalImgs - tempCnt >= (no of images in row))
{
loopCount = (no of images in row);
}
else
{
loopCount = totalImgs % (no of images in row);
}
for (int j = 0; j < loopCount; j++)
{
MasksData *mData = [masksList objectAtIndex:x];
UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
btn.frame = CGRectMake(x_axis, y_axis, width, height);
[btn setImage:[UIImage imageNamed:[NSString stringWithFormat:#"%#.png",mData.bgImage]] forState:UIControlStateNormal];
btn.backgroundColor = [UIColor clearColor];
btn.tag = x;
[scroll View addSubview:btn];
//photoCount++;
x_axis += width + some space;
tempCnt++;
i++;
x++;
}
y_axis += height + some space;
scroll View.contentSize = CGSizeMake(320.0, y_axis);
}
}
I have a scrollview that automatically generates a series of subviews containing imageviews. The concept is that it's pretty much a custom PDF style reader, where each page is loaded in to an imageview as an image. There are three "layers" - the outer UIScrollView, the automatically generated subViews and the imageview inside the subview.
I've been having some trouble with this, I've asked the question previously, but unfortunately, the core of my question was in the wrong place. Here is my second attempt:
On rotate, everything is rotated as needed. Unfortunately, this is what I'm getting:
Obviously, I would like Image 1 to be centred and for there to be no hint of image 2 until you flick the view across.
Here is my code for setting up the view:
- (void)loadView {
[self setUpView];
}
- (void)setUpView {
//INITIALISE PAGING SCROLL VIEW
CGRect pagingScrollViewFrame = [[UIScreen mainScreen] bounds];
pagingScrollViewFrame.origin.x -= 10;
pagingScrollViewFrame.size.width += 20;
pagingScrollView = [[UIScrollView alloc] initWithFrame:pagingScrollViewFrame];
pagingScrollView.contentMode = UIViewContentModeScaleAspectFit;
//CONFIGURE PAGING SCROLL VIEW
pagingScrollView.pagingEnabled = YES;
pagingScrollView.backgroundColor = [UIColor blackColor];
pagingScrollView.contentSize = CGSizeMake(pagingScrollViewFrame.size.width*7, pagingScrollViewFrame.size.height);
//ACTIVATE PAGING SCROLL VIEW
self.view = pagingScrollView;
//ADD PAGES TO SCROLL VIEW
for (int i = 0; i < 7; i++){
ImageScrollView *page = [[[ImageScrollView alloc] init] autorelease];
[self configurePage:page forIndex:i];
[pagingScrollView addSubview:page];
}
}
How do I re-define the size of the frame? What function should I call etc. How do I centre the image?
I'm new to this so I apologise for the ambiguity of my question.
Cheers
I've figured it out. It was the Frame of the individual pages that I needed to change, so (with the help gained from another question) I wrote a re-orient method.
The first step to this came because I figured out that I needed to iterate through and re-size each frame for each of my pages and then re-apply the frames to the view. For this to happen I needed to create an array which I would fill in the For Loop above. I have 7 total pages.
Then I could (on rotate) call the below re-orient method to re-size each view:
- (void) reOrient{
if(UIInterfaceOrientationIsPortrait(self.interfaceOrientation)){
CGRect f;
int i = 0;
for (ImageScrollView *page in pageArray) {
f = page.frame;
f.size.width = 320;
f.origin.x = (f.size.width * i);
page.frame = f;
pagingScrollView.contentSize = CGSizeMake(f.size.width * 7, 480);
i++;
}
}else{
CGRect f;
int i = 0;
for (ImageScrollView *page in pageArray) {
f = page.frame;
f.size.width = 480;
f.origin.x = (f.size.width * i);
page.frame = f;
pagingScrollView.contentSize = CGSizeMake(f.size.width * 7, 480);
i++;
}
}
}
This worked for me:
- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration
{
[super willRotateToInterfaceOrientation:toInterfaceOrientation duration:duration];
//get current page based on offset before rotation
NSInteger currentPage = self.scrollView.contentOffset.x / self.scrollView.bounds.size.width;
//set anticipated scrollview content size by switching width and height (they will be switched after rotation)
[self.scrollView setContentSize:CGSizeMake(totalPages * self.view.bounds.size.height, self.view.bounds.size.width)];
//set the anticipated content offset based on height before rotation
[self.scrollView setContentOffset:CGPointMake(currentPage * self.scrollView.bounds.size.height, 0.0f)];
}
Basically I am setting the content offset for the new scrollview content size before rotating (I'm switching height and width for the anticipated height and width).
This worked for me when rotating a full-screen paged UIScrollView.
All of the paged subviews have the following autoresizing mask so that they neatly fall into place after rotation:
UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleRightMargin