Before AutoLayout I could do a view cut to a circle shape with setting .layer.cornerRadius to half of the view's height.
Now, using AutoLayout how can I achieve, to my view keep look like a circle?
I have already tried and failed:
using KVO to find out when frame changes. It gets called, but at that point setting cornerRadius on the view does not have any effect
calling -setNeedsLayout to have frame values before I set cornerRadius (does not work either)
You need to set the property masksToBounds on the layer.
xyz.layer.masksToBounds = YES;
Further, the reason why this actually won't affect Auto Layout is because the view's frame will remain the same regardless of its corner radius.
Related
I have a simple app with a grouped UITableView. On the far left of each cell I have a thumbnail image and have manually created the top and bottom images to have curves to match the corners of the grouped table view.
This has worked well until iOS6. It appears the radius is slightly different which leaves me with gaps.
So that I can keep it looking consistent between iOS5 and 6, is there a way to alter the corner radius? I've tried altering the cell.backgroundView.layer.cornerRadius but it makes no difference.
Any help would be much appreciated!
Have you tried putting this after the cornerRadius?
cell.backgroundView.clipsToBounds = YES;
Setting this value to YES causes subviews to be clipped to the bounds of the receiver. If set to NO, subviews whose frames extend beyond the visible bounds of the receiver are not clipped. The default value is NO.
UIView Class Reference
I'm trying to scroll the contents of a UIView using the contentOffset which so far I achieve handling touchesBegan: and touchesMoves: methods of the view, however I get a jumpy effect as I'm changing the bounds of the UIView manually (for example: current position +/- the change of the last position of the finger and the new position)
Is there any easy way to achieve this without manually changing the bounds of the UIView?
IMPORTANT NOTES: I'm not using a UIScrollView because the mentioned UIView has plenty of draggable subviews so if I use a UIScrollView I can't drag because the UIViewScroll scrolling event executes over the subviews events.
Animating the layer of the mentioned UIView causes the contents to move out of control, like if the point of reference had changed somehow.
However I'm always open to suggestions.
I would rather make a UIView container clipping subviews, add the content view which we will drag as a subview and change it's frame. I think it shouldn't have jumpy effect as it must be the same as animating the view frame change.
I am having a problem with my toolbar when i change the orientation of my iPad.
i set my nib file into landscape and everything is all right but when i turned it to portrait my toolbar still has the width from the landscape orientation.
how will i make my toolbar adaptive to the orientation change to portrait?
Landscape:
Portrait:
thanks!
Try adding UIViewAutoresizingFlexibleWidth to the toolbar autoresizingMask like so:
myToolbar.autoresizingMask |= UIViewAutoresizingFlexibleWidth
Or, if your doing this in the Interface Builder, make sure this horizontal bar is selected (others may be selected as well, which is fine):
More from the UIView Class Reference about autoresizingMask:
When a view’s bounds change, that view automatically resizes its
subviews according to each subview’s autoresizing mask. You specify
the value of this mask by combining the constants described in
UIViewAutoresizing using the C bitwise OR operator. Combining these
constants lets you specify which dimensions of the view should grow or
shrink relative to the superview. The default value of this property
is UIViewAutoresizingNone, which indicates that the view should not be
resized at all.
When more than one option along the same axis is set, the default
behavior is to distribute the size difference proportionally among the
flexible portions. The larger the flexible portion, relative to the
other flexible portions, the more it is likely to grow. For example,
suppose this property includes the UIViewAutoresizingFlexibleWidth and
UIViewAutoresizingFlexibleRightMargin constants but does not include
the UIViewAutoresizingFlexibleLeftMargin constant, thus indicating
that the width of the view’s left margin is fixed but that the view’s
width and right margin may change. Thus, the view appears anchored to
the left side of its superview while both the view width and the gap
to the right of the view increase.
If the autoresizing behaviors do not offer the precise layout that you
need for your views, you can use a custom container view and override
its layoutSubviews method to position your subviews more precisely.
In addition to adjusting the flexible width of your toolbar you could create 2 arrays of toolbar items. One for portrait and one for landscape. Fortunately you only have to create the toolbar items once and just add them to the appropriate array(s).
Then during the orientation change you can set the toolbar's items array to the appropriate one.
Good Luck
I am attempting to reveal (through animation) a UIView. Specifically I want to show the center portion of the view and then slowly reveal the outer edges of it (sort of like pulling back a curtain).
My first attempt was to simply set the bounds rect to be smaller and animate it to be the full size of the view's frame, but this did not have the desired effect since by changing the bounds I was also changing the frame.
If what I am trying to do does not sound possible (at least not in a simple manner), at least I would like to be able to have is some way to make the subviews of the main view stationary relative to the screen, NOT their parent view, as the parent resizes (this would give a similar effect).
Any ideas?
Thank you,
-Matt
It definitely is possible. What you need to do is
For the view you're animating, setAutoresizesSubviews:NO and setClipsToBounds:YES.
Set the view's bounds (NOT the frame) to a rect with zero size and origin at the center point of the rect you want the view to occupy when it is fully revealed (in the view's own coordinate system). In other words, startBounds.origin.x should equal half of endBounds.size.width and similarly for y.
Position the view by setting its center (in the parent view's coordinate system).
In an animation block, change the view's bounds to zero origin and full size.
In the animation's completion block, you probably want to setAutoresizesSubviews:YES again.
You may also need to set the view's autoresizing mask to be fully flexible (springs but no struts), depending on what other layout gets triggered as you resize.
Sounds like you want to change its clipping. A cheap (code-wise) way to do that would be to insert the view into a parent view (with autoresizing set to center it), set the parent to clip its children and then animate the parent's frame.
Right now, I have a UIScrollView which scales its UIView contents on zoom events. When I hit a certain zoomScale threshold, I want to be able to toggle on and off extra information within the UIViews. Right now, I am simply setting the hidden flag to YES/NO to accomplish this.
However, a problem occurs while attempting to get the bounds of the UIView. The bounds always returns a width and height that extends to include the invisible content.
Is there a way to limit the bounds to only return the size of visible content within a UIView?
You could derive new bounds as you zoom and not rely on the view's automatic bounds adjusting.
OR
If it doesn't make your code too complicated, I would remove those subviews from your resizing view instead of just hiding them.