I have used scrollview and in that scrollview i have added text image now when i scroll the scrolling effect is not smooth it is either going up or down.
The code i have used is:
mScrollView.delegate = self;
//mScrollView.showsHorizontalScrollIndicator = FALSE;
[mScrollView setFrame:CGRectMake(0, 10, 1024, 768)];
// a page is the width of the scroll view
mScrollView.pagingEnabled = YES;
mScrollView.scrollsToTop = NO;
[mScrollView addSubview:mImgView];
// setting image according to the tag
if ( mTag == 0 )
{
[mBckImgView setImage:[self getImageFromName:#"ombgiphone"]];
[mImgView setFrame:CGRectMake(0, 10, 320, 1063)];
mImgView.image = [self getImageFromName:#"introtextiphone"];
[mScrollView setContentSize:CGSizeMake(320, 1400)];// size of the image
}
pagingEnabled servers a different pupose. I guess you don't want paging here. So, pagingEnabled should be NO to make it scroll smooth.
mScrollView.pagingEnabled = NO;
Related
I am displaying multiple labels inside a UIScrollView, I can get them to display and I can get them to scroll, but a label at the top of the screen is cut off and is not visible unless you pull down. I have a tried adjusting the UIScrollViews content size, frame etc. all to no avail. Please help! Code:
[self.view addSubview: scrollView];
scrollView.scrollEnabled = YES;
int scrollWidth = 120;
int scrollHeight = 1000;
scrollView.contentSize = CGSizeMake(scrollWidth,scrollHeight);
scrollView.frame = CGRectMake(0, 0, 320, 400);
Set the contentOffset to (0,0).
In my app i am creating view controller with mixed of UILabel and UITextview which want to be scrollable because the text are dynamic and also exceeds vertical screen size.
I am currently having Scrollview which has subviews as below. Views are created in Xcode 4.3 Storyboard.
UILabel1(Say Heading)
UITextView1(Dynamic text which can be any size)
UILabel2(Second Heading)
UITextView2(Dynamic text which can be any size)
and so on.
The problem is
When the UITextView1 has more content then it overlaps with UILabel2 which i don't want.
I would like to have UILabel1 on top of scrollView and UITextView1 below the UILabel1. UILabel2 below UITextView1 and so on.
What i have to do to achieve this?
EDIT
In Storyboard
![enter image description here][1]
In Simulator
![enter image description here][2]
Thanks for your help guys. Much appreciated.
Code
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
[scrollView setScrollEnabled:YES];
[self.view addSubview:cockTailNameLabel];
[self.view insertSubview:txtIngredients belowSubview:cockTailNameLabel];
[self.view insertSubview:scrollView belowSubview:cockTailNameLabel];
//[scrollView]
[self.cockTailNameLabel setText:self.passcockTailName];
[_txtUse setText:self.passUse];
[_txtUse setEditable:NO];
[_txtUse setUserInteractionEnabled:NO];
CGRect useFrame = _txtUse.frame;
useFrame.size.height = _txtUse.contentSize.height;
_txtUse.frame = useFrame;
[txtIngredients setText:self.passIngredients];
[txtIngredients setEditable:NO];
[txtIngredients setUserInteractionEnabled:NO];
CGRect ingredientFrame = txtIngredients.frame;
ingredientFrame.size.height = txtIngredients.contentSize.height;
txtIngredients.frame = ingredientFrame;
[txtRecipe setText:self.passReceipe];
[txtRecipe setEditable:NO];
[txtRecipe setUserInteractionEnabled:NO];
CGRect recipeFrame = txtIngredients.frame;
recipeFrame.size.height = txtRecipe.contentSize.height;
txtRecipe.frame = recipeFrame;
[scrollView insertSubview:_txtUse belowSubview:cockTailNameLabel];
[scrollView insertSubview:titleIngredients belowSubview:_txtUse];
[scrollView insertSubview:txtIngredients belowSubview:titleIngredients];
[scrollView insertSubview:btnReceipe belowSubview:txtIngredients];
[scrollView insertSubview:btnHome belowSubview:txtIngredients];
[scrollView insertSubview:txtRecipe belowSubview:btnHome];
[scrollView insertSubview:btnfacebookShare belowSubview:txtRecipe];
[scrollView insertSubview:btnTwitterShare belowSubview:txtRecipe];
/*[scrollView addSubview:_txtUse];
[scrollView addSubview:titleIngredients];
[scrollView addSubview:txtIngredients];
[scrollView addSubview:btnReceipe];
[scrollView addSubview:btnHome];
[scrollView addSubview:txtRecipe];
[scrollView addSubview:btnfacebookShare];
[scrollView addSubview:btnTwitterShare];*/
[scrollView setContentSize:CGSizeMake(320, 1000)];
NSLog(#"RecipeName :%# ",passcockTailName);
}
In Storyboard or IB you can rearrange them freely.
In code you do - (void)insertSubview:(UIView *)view belowSubview:(UIView *)siblingSubview.
In code (in viewDidLoad):
UIScrollView *scroll =[[UIScrollView alloc] initWithFrame:CGrectMake(0,0 320, 480)];
[self.view addSubview:scroll];
// code to init your UI object
UILabel *uilabel1 = [[UIlabel alloc] initWithFrame:CGrectMake(10,10, 100, 40)]; // example
uilabel1.font = [UIFont systemFontOfSize:10];
uilabel1.text = #"UILabel1";
uilabel1.backgroundColor = [UIColor clearColor];
//
//
UILabel *uilabel2 = [[UIlabel alloc] initWithFrame:CGrectMake(10, 10 + 10 + uilabel1.frame.origin.y, 100, 40)]; // example
uilabel2.font = [UIFont systemFontOfSize:10];
uilabel2.text = #"UILabel2";
uilabel2.backgroundColor = [UIColor clearColor];
//
//
[scroll addSubview:uilabel1];
[uilabel1 releale];
[scroll addSubview:uilabel2];
[uilabel2 releale];
//
//
// in end
float offset = 10.0 * 2; // offset between uiobjects, N - number of objects
scroll.contentSize = CGSizeMake (0, 0, uilabel1.frame.size.height + uilabel2.frame.size.height + offset, 320);
Note that you may set frame (and other properties) of yours uiobjects and adds it in order to descend.
You can tell next view to start from the end of the first view like so:
startYOfNextView = firstView.frame.origin.y position + firstView.frame.size.height;
Do the same for the rest of the other view. If your view has variable text length, you may need to precaculate the height of the string based on a specific font e.g.:
CGSize maxSize = CGSizeMake(widthOfView, 9999999);
CGSize expectedSize = CGSizeMake(stringVar sizeWithFont:[UIFont fontWithName:#"Arial"] withMaxSize:maxSize lineBreakMode:UILineBreakModeWordWrap);
then tell your dynamic view to use the height of expectedSize variable like so:
myDynamicView = [[UILabel alloc] initWithFrame:CGRectMake(..., expectedSize.height)];
Your issue is labels are coming on top of the textview (Overlapped), right?
In This case, you are modifying the height of the textview dynamically. If its just for display purpose you can set the text to a UILabel with numberOfLines = 0 instead of UITextview; As its added to scrollview adding a label will be fine.
Also you need to modify the origin.y of the remaining views so that it will be properly aligned. ie, secondView.origin.y = firstView.origin.y + firstView.size.height + offset. Likewise modify the origin of the remaining views wrt the just above view. So that its origin will lie outside the previous view frame.
In my case I had to project it over the parent view, so remember there is also something,
- (void)insertSubview:(UIView *)view aboveSubview:(UIView *)siblingSubview
I think adding a transparent UI button is the fastest solution. You could add it once and then show / hide whenever you need to disable all views below the current one (assuming the "current" view, say a popup, was added last to your superview).
Declare an instance variable UIButton* _parentDisablingOverlay; in your popup view, then add this in its init or layoutSubviews method:
_parentDisablingOverlay = [[UIButton alloc] initWithFrame:CGRectMake(0,0, self.superview.frame.size.width, self.superview.frame.size.height)];
[self.superview insertSubview:_parentDisablingOverlay belowSubview:self];
_parentDisablingOverlay.hidden = true;
Later on, when you want to show the popup and disable everything below:
- (void) open {
self.hidden = false;
_parentDisablingOverlay.hidden = false;
}
Similarly to close and re-enable everything:
- (void) close {
self.hidden = true;
_parentDisablingOverlay.hidden = true;
}
How do I set the starting point of a UIScrollView? I would like to add a UIImageView left of the UIScrollView but changing the contentSize only adds scrolling room to the right of the scrollview. How do I add an ImageView left of the scrollView's (0,0) point and make it part of the scrollview's content size?
Hopefully I've got what you're trying to do here. I think this just takes a few turns with the contentOffset to get right.
Starting off;
Add the scrollView at frame (0,0,320,480) - its a full screen scroller
set contentSize to (320*3, 480) - it now has a content with the width of 3 'pages'
Add your imageView as a subview to the scrollView at frame (320,0,320,480)
set contentOffset of the scrollView to (320, 0) - this will move the content of the scrollView left, in the negative x direction by 320
Now your imageView will be on screen, but it will have a 320px width both on the left and right on the scroller content.
(Note that in the code below, i've simply added a UIView and not an imageView)
UIScrollView *scroller = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, 320, 480)];
scroller.delegate = self;
scroller.pagingEnabled = YES;
scroller.backgroundColor = [UIColor blueColor];
scroller.contentSize = CGSizeMake(960, 480);
UIView *imgView = [[UIView alloc] initWithFrame:CGRectMake(320, 0, 320, 480)];
[imgView setBackgroundColor:[UIColor redColor]];
[scroller addSubview:imgView];
[scroller setContentOffset:CGPointMake(320, 0)];
[self.view addSubview:scroller];
Does that help?
Actually the best solution to start in the middle of the scroller if you are in a iPhone you should
[scroller setContentOffset:CGPointMake(320, 0)];
[self.view addSubview:scroller];
And for iPad
[scroller setContentOffset:CGPointMake(1024, 0)];
[self.view addSubview:scroller];
Try setting the Content offset.
[scrollView setContentOffset:CGPointMake(320, 0.0)];
If you're simply looking to set where the scroller content should be positioned at the start, you could do so with the - (void)setContentOffset:(CGPoint)contentOffset animated:(BOOL)animated method which will scroll the content to the point specified in the method.
Let me know if this is not what you wanted to know, and I'll get back to ya!
Cheers.
The key to setting the starting point, is to assign bounds with xy coordinates different than zero. Like this
lazy var contentView: UIView = {
let size = CGFloat(5000)
let view = UIView(frame: CGRectZero)
view.frame = CGRectMake(0, 0, size, size)
view.bounds = CGRectMake(-size/2, -size/2, size, size)
return view
}()
func centerContent() {
let frame = UIEdgeInsetsInsetRect(self.scrollView.bounds, self.scrollView.contentInset)
let navigationBarHeight = self.scrollView.contentInset.top
let x = (self.scrollView.contentSize.width/2) - (frame.size.width/2)
let y = (self.scrollView.contentSize.height/2) - (frame.size.height/2) - navigationBarHeight
self.scrollView.contentOffset = CGPointMake(x, y)
}
Ok so this is kind of a strange issue, but I have got two scrollViews that each have a nested imageView so as to allow for panning and zooming of an image. The tow scrollView/imageView combo's are showing up just great, and because the image is bigger than my scrollView size, I can pan just great. Here is my viewDidLoad:
-(void) viewDidLoad
{
// set the image to be displayed, pic your own image here
imageView = [[MyImage alloc] initWithImage: [UIImage imageNamed: #"newBackground.png"]];
// yes we want to allow user interaction
[imageView setUserInteractionEnabled:YES];
// set the instance of our myScrollView to use the main screen
scrollView = [[MyScroll alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]];
// turn on scrolling
[scrollView setScrollEnabled: YES];
// set the content size to the size of the image
[scrollView setContentSize: imageView.image.size];
// add the instance of our myImageView class to the content view
[scrollView addSubview: imageView];
// flush the item
[imageView release];
// set max zoom to what suits you
[scrollView setMaximumZoomScale:1.0f];
// set min zoom to what suits you
[scrollView setMinimumZoomScale:0.25f];
// set the delegate
[scrollView setDelegate: self];
// scroll a portion of image into view (my image is very big) :)
//[scrollView scrollRectToVisible:CGRectMake(100, 100, 320, 440) animated:NO];
// yes to autoresize
scrollView.autoresizesSubviews = YES;
// set the mask
scrollView.autoresizingMask = (UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight);
// set the view
//self.view =scrollView;
[scrollView setFrame:CGRectMake(0, 0, 320, 230)];
[self.view addSubview:scrollView];
imageView1 = [[MyImage alloc] initWithImage: [UIImage imageNamed: #"newBackground.png"]];
// yes we want to allow user interaction
[imageView1 setUserInteractionEnabled:YES];
// set the instance of our myScrollView to use the main screen
scrollView1 = [[MyScroll alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]];
// turn on scrolling
[scrollView1 setScrollEnabled: YES];
// set the content size to the size of the image
[scrollView1 setContentSize: imageView1.image.size];
// add the instance of our myImageView class to the content view
[scrollView1 addSubview: imageView1];
// flush the item
[imageView1 release];
// set max zoom to what suits you
[scrollView1 setMaximumZoomScale:1.0f];
// set min zoom to what suits you
[scrollView1 setMinimumZoomScale:0.25f];
// set the delegate
[scrollView1 setDelegate: self];
// scroll a portion of image into view (my image is very big) :)
//[scrollView scrollRectToVisible:CGRectMake(100, 100, 320, 440) animated:NO];
// yes to autoresize
scrollView1.autoresizesSubviews = YES;
// set the mask
scrollView1.autoresizingMask = (UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight);
// set the view
//self.view =scrollView;
[scrollView1 setFrame:CGRectMake(0,240,320,230)];
[self.view addSubview:scrollView1];
//[[self view] addSubview:scrollView];
}
No as for zooming, when I pinch to zoom on the FIRST scrollView/imageView pair, it works beautifully, no problems whatsoever. It zooms and pans no problem. BUT when I pinch to zoom my second scrollView, it pans the image of the SECOND, and zooms the image of the FIRST. SO my SECOND scrollView zooms the FIRST's image. Huh? I have no idea why that would be happening.
All I want is to have to separate images viewed that can be independently panned and zoomed.
Any thoughts as to what might be happening?
Thanks!
Your viewForZoomingInScrollView: method is probably returning the same image view for both scroll views. It needs to look at which scroll view is being passed in and return the corresponding image view.
Ok, I have been working on solving this problem all day, and I am getting really close. I am trying to have create a way to view more than one scrollView/imageView nested pair that allows for zooming on an image.
When the view loads, there is just one scrollView that takes up the whole screen, but then when a button is pressed, I cut the width of the first scrollView in half, and unhide another (which has a nested imageView in it as well) right next to it. So there is a split view effect, and ideally the user will be able to pinch and zoom each image separately.
So I have all that working except for the separate pinch and zoom part. No matter where I pinch on the screen, only the first scrollView zooms. So even though I am touching another scrollView, it is still only affecting the first.
I have them setup in IB, and then they are setup in viewDidLoad this way:
[scrollView setBackgroundColor:[UIColor blackColor]];
[scrollView setCanCancelContentTouches:NO];
scrollView.clipsToBounds = YES; // default is NO, we want to restrict drawing within our scrollview
scrollView.indicatorStyle = UIScrollViewIndicatorStyleWhite;
scrollView.minimumZoomScale = 1;
scrollView.maximumZoomScale = 5;
scrollView.delegate = self;
[scrollView setScrollEnabled:YES];
imageView3 = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"monitor.JPG"]];
[scrollView addSubview:imageView3];
//[scrollView setFrame:CGRectMake(0, 0, 1024, 660)];
[scrollView1 setBackgroundColor:[UIColor blackColor]];
[scrollView1 setCanCancelContentTouches:NO];
scrollView1.clipsToBounds = YES; // default is NO, we want to restrict drawing within our scrollview
scrollView1.indicatorStyle = UIScrollViewIndicatorStyleWhite;
scrollView1.minimumZoomScale = 1;
scrollView1.maximumZoomScale = 5;
scrollView1.delegate = self;
[scrollView1 setScrollEnabled:YES];
imageView31 = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"monitor.JPG"]];
[scrollView1 addSubview:imageView31];
And then I hide and unhide different scrollViews (I have 40 depending on the segmentedControl index on the toolbar. Am I headed in the right direction? Is it possible to have two separately accessible scrollViews?
Any help would be appreciated.
Thanks!
EDIT:
Ok so I went through and updated the clipToBunds bit...DUH. It definitely makes it look better, but still isn't solving the problem. Here is the code I am calling depending on the selected index:
-(void) pickedOne{
if(segment.selectedSegmentIndex == 0){
[scrollView setFrame:CGRectMake(0, 0, 1024, 660)];
[scrollView setContentSize:CGSizeMake(1024, 660)];
scrollView.hidden = NO;
scrollView1.hidden = YES;
scrollView2.hidden = YES;
scrollView3.hidden = YES;
}else if(segment.selectedSegmentIndex == 1){
[scrollView setFrame:CGRectMake(0, 0, 512, 660)];
scrollView.zoomScale = 1.0;
scrollView.hidden = NO;
[scrollView1 setFrame:CGRectMake(512, 0, 512, 660)];
scrollView1.zoomScale = 1.0;
scrollView1.hidden = NO;
scrollView2.hidden = YES;
scrollView3.hidden = YES;
}
Is there anything majorly wrong with that approach?
If I pinch to zoom on the right scrollView, it makes the scroll view bigger, (but doesn't increase the size of the scrollView2 image) but it DOES increase the size of the first scrollView's image when you pinch inside of EITHER scrollViews...strange
scrollView.clipsToBounds = NO; // default is NO, we want to restrict drawing within our scrollview
Isn't this the opposite of what you want? Setting it to YES restricts restricts drawing to within your scrollview.
It sounds to me like you aren't resizing the scrollview. Are you resizing its contents or the image view within it? Can you post the code that is called when you tap the button?