xcode 5 horizontal scrollview doesn't work (iOS7) - ios

Im trying to create an filter bar with a horizontal scroll view.
How can I create the horizontal scrollview in xcode 5 for iOS7?
This is my code:
[self.scroll setScrollEnabled:YES];
[self.scroll setDelegate:self];
self.scroll.backgroundColor = [UIColor clearColor];
scroll.contentMode = UIViewContentModeScaleToFill;
[self.scroll setContentSize:CGSizeMake(320.0,143.0)];
[self.view addSubview:scroll];
[self.scroll setContentSize:CGSizeMake(320.0,143.0)];

For scroll view to scroll horizontally the width of the content size should be larger than the actual frame of scroll view.
If your scroll view frame size is (320, 143), the width of content size of scroll view should be larger than 320 so that the scroll view scroll.
For horizontal scroll view you can use, EasyTableView. Its simple to use.

You will need to get use to the facilities - the horizontal scrollview works and it works in different ways including simulating pages that you can flick right or left.
scrollview has a physical size (frame) and a content size, the thing with scrollviews is the content size will be larger than the physical dimensions so I can for example have a UIImageView of 930x 250 viewable in an iPhone with 320 x 480
(I'll skip the rest of the setup - just what's essential - for all the other tricks look into the apple sample projects - there is a lot - Note also that a lot of apps just use the Interface Builder to paint the view with the scrollview )
UIScrollview *scroll = [[UIScrollview alloc] init]
scroll.frame = CGSizeMake (0,100,320,250);
scroll.contentsize = CGSizeMake(930,250)
UIImageView *imageview = [[UIImageView alloc]init];
imageview.image = myimage; //(UIImage)
[self.view addSubview:scroll]; // add subview as the bottom layer to the main view
[scroll addSubview imageview];
Below is something more complex with pages:
pagectrl.numberOfPages = 7;
pagectrl.currentPage = 0;
scrollView.pagingEnabled = YES;
scrollView.contentSize=CGSizeMake(320* pagectrl.numberOfPages, 500);
scrollView.showsVerticalScrollIndicator = NO;
scrollView.showsHorizontalScrollIndicator = YES;
scrollView.bouncesZoom = NO;
scrollView.decelerationRate = UIScrollViewDecelerationRateFast;
scrollView.scrollsToTop = NO;
scrollView.delegate = self;
search_url.delegate = self;
user.delegate = self;
password.delegate = self;
rpc_code.delegate = self;
// add pages
int page = 0;
CGRect frame = scrollView.frame;
pagesize = frame.size.width;
frame.origin.y = 0;
frame.origin.x = frame.size.width * page;
firstView.frame = frame;
[scrollView addSubview:firstView];
page ++;
frame.origin.x = frame.size.width * page;
locsubView.frame = frame;
[scrollView addSubview:locsubView];
page ++;
frame.origin.x = frame.size.width * page;
QRgensubView.frame = frame;
[scrollView addSubview:QRgensubView];
page ++;
frame.origin.x = frame.size.width * page;
scansubView.frame = frame;
[scrollView addSubview:scansubView];
page ++;
frame.origin.x = frame.size.width * page;
symbologysubView.frame = frame;
[scrollView addSubview:symbologysubView];
page ++;
frame.origin.x = frame.size.width * page;
gaView.frame = frame;
[scrollView addSubview:gaView];
page ++;
frame.origin.x = frame.size.width * page;
upcsubView.frame = frame;
[scrollView addSubview:upcsubView];
[self registerForKeyboardNotifications];
if (gotopage == 7) {
int xloc = ((gotopage - 1) * pagesize);
CGRect fieldrect = CGRectMake(xloc,0,320, pagesize);
[scrollView scrollRectToVisible:fieldrect animated:YES];
}

Related

scrollRectToVisible not working in page view controller - iPhone sdks

I am using Xcode 6.1 and developing for iOS 8.0.
In my application I have a UIPageViewController. In that I have added a UIScrollView. In the UIScrollView I have 4 buttons. When I tap on a button I use this code.
long btnValue = sender.tag;
float spaceing = 0;
if(btnValue == 1)
spaceing = self.scrollView.frame.size.width/4*btnValue;
else
spaceing = (self.scrollView.frame.size.width/2*btnValue) - self.scrollView.frame.size.width/4;
CGRect frame;
frame.origin.x = spaceing;
frame.origin.y = 0;
frame.size = self.scrollView.frame.size;
[self.scrollView scrollRectToVisible:frame animated:YES];
self.scrollView.pagingEnabled = NO;
This(scrollRectToVisible:) is not working. Can anyone help me?
Thanks.
long btnValue = sender.tag;
float spaceing = 0;
if(btnValue == 1)
spaceing = self.scrollView.frame.size.width/4*btnValue;
else
spaceing = (self.scrollView.frame.size.width/2*btnValue) - self.scrollView.frame.size.width/4;
CGRect frame;
frame.origin.x = spaceing;
frame.origin.y = 0;
frame.size = self.scrollView.frame.size;
[self.scrollView scrollRectToVisible:frame animated:YES];
self.scrollView.pagingEnabled = NO;
// Problem is here
frame.size = self.scrollView.frame.size; //scrollView.frame.size matters
set
frame.size = self.View.frame.size;
and if you are doing it by coding then please add your scrollview into your view
[self.view addSubview:yourScrollView];

URL is not loading completely on my UIWebView in iOS?

I am working on an iPhone application, where i am opening an URL to my UIWebView. The problem is URL is not loading perfectly. As per my requirement, i need to add UIWebView as footer view of my table. but the problem is after getting the web view content height size from webViewDidFinishLoad method, i am setting frame of my footer view. here is my code :
- (void)webViewDidFinishLoad:(UIWebView *)aWebView {
aWebView.scrollView.scrollEnabled = NO;
CGRect frame = aWebView.frame;
frame.size.height = 1;
aWebView.frame = frame;
CGSize fittingSize = [aWebView sizeThatFits:CGSizeZero];
frame.size = fittingSize;
aWebView.frame = frame;
[self setFooterView:fittingSize.height + aWebView.frame.origin.y];
}
-(void)setFooterView:(float)fittingHeight
{
bottomView.frame = CGRectMake(0, 0, 320, fittingHeight);
webViewSocial.frame = bottomView.frame;
[tableView reloadData];
}
But when i am scrolling my table view, then my UIWebView (footer view) is not scrolling completely. Can you please tell me how can i achieve my output. Thanks!
try to set like this
- (void)webViewDidFinishLoad:(UIWebView *)aWebView {
CGFloat height = [[self.webView stringByEvaluatingJavaScriptFromString:#"document.height"] floatValue];
CGFloat width = [[self.webView stringByEvaluatingJavaScriptFromString:#"document.width"] floatValue];
CGRect frame = self.webView.frame;
frame.size.height = height;
frame.size.width = width;
self.webView.frame = frame;
self.tableView.tableFooterView = webView;
}

The buttons / labels added to the UIScrollView are appeared only on the first page

I have a UIScrollView paging option enabled with the next code:
- (void)viewDidLoad
{
[super viewDidLoad];
for (int i = 0; i < 6; i++) {
CGRect frame;
frame.origin.x = self.scrollView.frame.size.width * i;
frame.origin.y = 0;
frame.size = self.scrollView.frame.size;
[scrollView scrollRectToVisible:frame animated:YES];
UIView *subview = [[UIView alloc] initWithFrame:frame];
itemName.text = #"Samara";
[self.scrollView addSubview:subview];
[subview release];
}
self.scrollView.contentSize = CGSizeMake(self.scrollView.frame.size.width * 6, 1.0);
}
I have a number of elements (buttons, labels), added in storyboard to this ScrollView element, but in UI they're appeared only on the first page - the next pages are blank. How can I solve this?
Just reading through your code example - here is how to make your scrollview page, what you add inside those scrollview is up to you:
//Set your scrollView frame
[self.scrollView setFrame:CGRectMake(0,0,320,460];
//Will use this value to set the content width after the loop
CGFloat scrollWidth = 0;
CGFloat pageWidth = self.scrollView.frame.size.width;
CGFloat pageHeight = self.scrollView.frame.size.height;
for (int i = 0; i < 6; ++i)
{
//Create the page and make the origin.x i * pageWidth
UIView *page = [[UIView alloc] initWithFrame:CGRectMake((i * pageWidth),0,pageWidth,pageHeight)];
scrollWidth += page.width;
//Add the page
[self.scrollView addSubview:page];
}
//set the content size to the right edge of the last page (scrollWidth)
[self.scrollView setContentSize:CGSizeMake(scrollWidth,pageHeight)];
//Scroll to the last page - assuming you wanted this by looking at the code in your loop
[self.scrollView scrollRectToVisible:CGRectMake((scrollWidth - pageWidth),0,pageWidth,pageHeight)];
//Enable paging and scrolling (scrollEnabled should be YES by default)
self.scrollView.pagingEnabled = YES;
self.scrollView.scrollEnabled = YES;
Best I can do based on your code - hope it helps

IOS Add subview on viewDidLoad

i have a problem when i'm trying to add subviews to a UIScrollView on viewDidLoad.
I'm using this code to programmatically add the UIImageViews to the scrollView:
- (void)viewDidLoad {
[super viewDidLoad];
NSInteger const_width = 100;
NSInteger numberOfViews = 4;
CGRect theFrame = [self.scrollView frame];
for (int i = 0; i < numberOfViews; i++) {
CGFloat xOrigin = i * const_width;
UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(xOrigin,theFrame.origin.y,const_width,110)];
UIImage *image = [UIImage imageNamed:#"cocoloco.jpg"];
[imageView setImage:image];
//[self.scrollView addSubview:imageView];
imageView.tag = i;
CGRect rect = imageView.frame;
rect.size.height = 110;
rect.size.width = 110;
imageView.frame = rect;
[self.scrollView addSubview:imageView];
}
self.scrollView.contentSize = CGSizeMake(const_width * numberOfViews, 110);}
But i get the current view:
It seems that the scroll view frame takes its position regardless the 3 yellow tabs (that are a special TabBarController) so i get a wrong frame origin from the UIScrollView and therefore the UIImageViews are wrong positioned.
Any idea?
I don't know exactly how to do it, but add the height of the frame to the "Y" position of your rectangle. Something like this:
UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(xOrigin,theFrame.origin.y + (theFrame.height),const_width,110)];
To get the scrollview below the navigation bar at the top, try
self.scrollview.autoresizingMask = UIViewAutoresizingFlexibleTopMargin;
Then position the table below the scrollview by setting it's origin base on the scrollview origin and height:
CGRect frame = tableView.frame;
frame.origin.y = self.scrollview.frame.origin.y + self.scrollview.frame.size.height;
tableView.frame = frame;
You should move any resizing or layout of your UI to the -(void)layoutSubviews method and this should sort your problem correctly.

UISegmentedControl setting UITableView, page control, scrollview, image view

i have a segmented control with 4 segment
segment 1 - i need a page control to swipe through photos <- -> left & right. 1- 4 photos max
Segment 2 & 3 - i need a table view
Segment 4 - i need it to be able to play video
i'm currently doing this
- (IBAction)infoAction:(id)sender {
NSString * selectedTitle = [info titleForSegmentAtIndex:[info selectedSegmentIndex]];
NSLog(#"Selected Title = %#",selectedTitle);//test
switch ([info selectedSegmentIndex])
{ case 0:
{
test.text = [frogInfo.imageFiles objectAtIndex:0];
test.textColor = [UIColor whiteColor];
[tempImageView setImage:[UIImage imageNamed:#"Detail1Temp.png"]];
break;
}
case 1:
{
test.text = frogInfo.description;
test.textColor = [UIColor whiteColor];
[tempImageView setImage:[UIImage imageNamed:#"Detail2Temp.png"]];
break;
}
case 2:
{
test.text = frogInfo.distribution;
test.textColor = [UIColor whiteColor];
[tempImageView setImage:[UIImage imageNamed:#"Detail3Temp.png"]];
break;
}
case 3:
{
test.text = [frogInfo.videoFiles objectAtIndex:0];
test.textColor = [UIColor whiteColor];
[tempImageView setImage:[UIImage imageNamed:#"Detail4Temp.png"]];
break;
}
}
}
picture with page control
section tableview
Based on what i will like to do, is it possible ? in this switch case function ?
can anybody show or have any link to tutorial on how to work out the page control swiping ?
thanks for reading
Des
I have done something very similar although I used a UISlider instead of segmented control - What you need is a pageable UISCrollview with 4 equal sized pages (UIViews) loaded horizontally one after another if take-up the entire width of an iPhone each page is 320 wide and the content size width of your scrollview will be 1280. Tie up the UIsegmented controls to scroll the pages programatically:
assuming a page width of 320:
-(IBAction)movepage:(id)sender {
int xloc = (segmentedController.selectedSegmentIndex * 320);
CGRect fieldrect = CGRectMake(xloc,0,320, pagesize.height);
[scrollView scrollRectToVisible:fieldrect animated:YES];
}
To load the scrollview and manage the pagecontroller:
pagectrl.numberOfPages = 4;
pagectrl.currentPage = 0;
scrollView.pagingEnabled = YES;
scrollView.contentSize=CGSizeMake(320* pagectrl.numberOfPages, 500);
scrollView.showsVerticalScrollIndicator = NO;
scrollView.showsHorizontalScrollIndicator = YES;
scrollView.bouncesZoom = NO;
scrollView.decelerationRate = UIScrollViewDecelerationRateFast;
scrollView.scrollsToTop = NO;
scrollView.delegate = self;
search_url.delegate = self;
user.delegate = self;
password.delegate = self;
rpc_code.delegate = self;
// add pages
int page = 0;
CGRect frame = scrollView.frame;
pagesize = frame.size.width;
frame.origin.y = 0;
frame.origin.x = frame.size.width * page;
firstView.frame = frame;
[scrollView addSubview:firstView];
page ++;
frame.origin.x = frame.size.width * page;
locsubView.frame = frame;
[scrollView addSubview:locsubView];
page ++;
frame.origin.x = frame.size.width * page;
QRgensubView.frame = frame;
[scrollView addSubview:QRgensubView];
page ++;
frame.origin.x = frame.size.width * page;
scansubView.frame = frame;
[scrollView addSubview:scansubView];
page ++;
frame.origin.x = frame.size.width * page;
symbologysubView.frame = frame;
[scrollView addSubview:symbologysubView];
[self registerForKeyboardNotifications];
CGRect fieldrect = CGRectMake(0,0,320, pagesize);
[scrollView scrollRectToVisible:fieldrect animated:YES]; //goto 1st page
}
Note you may need to control or manage the user ability to scroll the scroll view - you do that by setting up the scrollview delegate - the code below is not fitted to your exact requirement but I'm sure you can figure out the rest!
- (void)scrollViewDidScroll:(UIScrollView *)sender
{
// We don't want a "feedback loop" between the UIPageControl and the scroll delegate in
// which a scroll event generated from the user hitting the page control triggers updates from
// the delegate method. We use a boolean to disable the delegate logic when the page control is used.
// if (pageControlUsed)
// {
// do nothing - the scroll was initiated from the page control, not the user dragging
// return;
// }
// Switch the indicator when more than 50% of the previous/next page is visible
int page = floor((scrollView.contentOffset.x - pagesize / 2) / pagesize) + 1;
pagectrl.currentPage = page;
// A possible optimization would be to unload the views+controllers which are no longer visible
}

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