i got a tableview and as a header i use amongst other things a scrollview.
All work ok in terms of scrolling apart from the fact that when i scroll down (or up) the tableview the scrollview "loses" the x,y coordinates.
for example if i scroll the scrollview on the headerview right to left (or vice versa) then the scrollOffset.x gets a value.
if i start scrolling the tableview then this value goes back to zero (although the scrollview doesnt lose the paging). If i go back to the scrollview and start scrolling again the scrollOffset.x gets its correct value again.
Anyway to "keep" the scrollOffset.x value when i scroll the tableview?
thanks
Considering that a tableView is a scrollView subclassed it seems like the problem is that scrollOffset.x is set by whichever scrollView you're currently scrolling inside of. Try adding tags to your table view and scroll view and add a variable to keep up with the scrollOffset.x for only the scrollView in your header.
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I am currently programming an application for the iPhone and I am having some issues with my horizontal (horizontal as in you scroll horizontally, not vertically) UIScrollView.
The UIScrollView's height is 260 and the width is 320. It has 2 pages and each page has a UITableView in it. The UITableView's frame is the same as the UIScrollView's frame.
The problem is that 80% of the time, the current UITableView detects the drag/swipe as a vertical scroll (but it's actually horizontal) and begins to scroll the table view vertically.
My question is the following:
Can somebody explain to me how the app Reminders does for the scrollview scrolling. If you look carefully, you can see that the scrollview handles the horizontal scrolling very well and that a horizontal scroll is handled by the scrollview (and not by the tableview like mine does). If anyone needs more explanation please leave a comment.
If I try to scroll to the left/right in the table view of Reminders, it doesn't respond to it. If I scroll in the table header view where the add button is, it scrolls without any problems. My guess is that they made the table view header a UIScrollView. Apple highly discourages the use of a table view in a scroll view (or any view that inherits from UIScrollView into a different view that inherits from UIScrollView, for that matter), so they probably wouldn't take their own advice and ignore it.
I have an interface which will have a text view and a table view below it. My current view looks like this
UIScrollView
UITextView
UITableView
Currently the TextView and TableView can scroll vertically..but what i want is the whole screen to scroll up/down. Why doesn't this work properly?
You can put a TableView inside a ScrollView, but you must resolve conflicts between touches, scrolling, and bouncing in IB or with code, and you must set the ScrollView's contentSize with code, not in IB.
If the TextView really "belongs" to the table, consider putting it in a table cell, or better, as a header, that's what they're for.
I have a UIScrollView that has a single child view within it. If I set the contentSize of the UIScrollView immediately after creation, everything works as I expect and I get scrolling.
The challenge is the view within the UIScrollView is dynamically sized. The width is fixed, but the height is unknown at the time I set up the scrollview.
When I do a [scrollView setContentSize:CGRectMake(...)] after the inner view does it's thing, the scrollview updates to the proper size and scrolling works. So basic scrolling works fine.
However, the major problem is that when I setContentSize at a later point, the UIScrollView decides to scroll down(with animation) towards the end of the scrollview, which is not what I want, I want the scroll to stay at the top, and let the contents within the scrollview either get bigger or smaller, without changing the apparent scroll position.
What am I missing?
Why don't you also call [scrollview setContentOffset:CGPointMake(0,0)]; when you call the setContentSize?
To force UIScrollView to scroll only e.g. horizontally, I always set non-scrollable value for contentSize to 0, using:
CGSizeMake(contentSize.width, 0).
I have a UIScrollView subclass with a certain subview I'd like to prevent from scrolling (while all the other subviews scroll as normal).
The closest example to this I can think of is UITableView's "index strip" on the right side (look in the Contacts app to see an example). I am guessing this is a subview of the table (scrollview) but it does not move as the user scrolls.
I can't seem to make my subview stay put! How can I accomplish this?
The trick is to adjust the frame of the "non-scrollable" subview inside -layoutSubviews.
Add the view that you want not to move as a sibling view of the scroll view on top of the scroll view instead of as a subview.
You can set it's property called userInteractionEnabled to NO
Let's say, i have two tableview inside a scrollview. After i scrolled up & down tableview1, and then touch and swipe to scroll the scrollview horizontally to tableview2, i want tableview2 to have the same vertical (up & down) position as tableview1. is there any way to achieve that?
thanks
You can put code in the UITableViews' viewWillDisplay: methods that grabs the other table view's scroll position (called a "content offset" in scroll view parlance) and calls setContentOffset:animated:. This way, whenever either scroll view will appear on the screen, it will automatically scroll to the other view's position.