I'm using setBackgroundImage:forToolbarPosition:metrics: method of UIToolbar.
That's my code:
toolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0,0, 320, 44)];
[toolbar setBackgroundImage:[UIImage imageNamed:#"top"] forToolbarPosition:UIToolbarPositionTop barMetrics:UIBarMetricsDefault];
[toolbar setBackgroundImage:[UIImage imageNamed:#"bottom"] forToolbarPosition:UIToolbarPositionBottom barMetrics:UIBarMetricsDefault];
[self.view addSubview:toolbar];
As you can see I've put my toolbar on top. However when I run the code the toolbar image used is [UIImage imageNamed:#"bottom"].
How UIToolbarPosition is obtained?
My first idea is frame check ( < 1/2 superview frame is top, otherwise is bottom... or sort of).
It still on bottom. Any idea?
on iPhone UIToolbarPosition is always on bottom because UIToolbar is not supposed to be on top.
on iPad it works fine, UIToolbarPositionTop is used when toolbar.frame.origin.y = 0, UIToolbarPositionBottom otherwise.
Related
If I resize the window to be smaller than the metal view I can see the scrollbars for a second but I cannot click on them nor they stay visible. Do you know how I can change this behavior? I would expect the scrollbars to be visible and clickable as long as the window is smaller than the metal view.
nsview = gdk_quartz_window_get_nsview(window);
NSScrollView *scroll_view = [[NSScrollView alloc]initWithFrame: [nsview frame]];
[scroll_view setBorderType: NSNoBorder];
[scroll_view setHasVerticalScroller: YES];
[scroll_view setHasHorizontalScroller: YES];
[scroll_view setAutoresizingMask: NSViewWidthSizable | NSViewHeightSizable];
[nsview addSubview: scroll_view];
self->clip_view = [[DvFlippedClipView alloc]initWithFrame: [nsview frame]];
[scroll_view setContentView: self->clip_view];
self->mtk_view = [[MTKView alloc]initWithFrame: [nsview frame]
device: self->device];
self->mtk_view.framebufferOnly = YES;
self->mtk_view.autoResizeDrawable = NO;
self->mtk_view.translatesAutoresizingMaskIntoConstraints = NO;
self->mtk_view_delegate = [[DvMetalViewDelegate alloc] init: self->mtk_view];
self->mtk_view.delegate = self->mtk_view_delegate;
[scroll_view setDocumentView: self->mtk_view];
From a different callback I do the following:
[self->mtk_view setBounds:NSMakeRect(0, 0, width, height)];
[self->mtk_view setFrame:NSMakeRect(0, 0, width, height)];
self->mtk_view.drawableSize = CGSizeMake(width, height);
I had a similar problem yesterday, and I suspect the strange scroller behavior and lack of scrolling altogether may be stemming from what I suspect your problem is. Hopefully it will at least enlighten your or someone else if you haven't already found an answer.
My view hierarchy looks like this:
The problem was that I had set MTKView as the view property of CenterTopViewController, rather than the Bordered Scroll View. Doing that, for all practical intents and purposes, removed MTKView from the hierarchy and set it so that its superview property pointed to the split view in which all of this resides. The scroll view did not seem to be part of the responder chain, and was never handling any scroll events (or at least not in any meaningful way).
Setting the scroll view as the view property of the view controller fixed everything.
P.S.
If you're confused as to why there is an unnecessary view above the MTKView, it's just a result of almost desperate attempts to uncover the problem before I figured it out. I haven't gotten around to fixing it yet.
I am trying to add an image as a background to a UILabel, but my UILabel's title cannot be seen, even though I tried to send the background image to the back. My code is below and any advice on how to help with this would be great, thanks!
UIImageView *labelBackground = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"image.png"]];
[myLabel addSubview:labelBackground];
[myLabel sendSubviewToBack:labelBackground];
myLabel.backgroundColor = [UIColor clearColor];
[myLabel setText:title];
When you add a view (your image view) as a subview to another view (your label), the subview will always be in front of its superview. They would either need to be siblings:
[myContainer addSubview:labelBackground];
[myContainer addSubview:myLabel];
or better yet, the label should be a subview of the image view:
[labelBackground addSubview:myLabel];
[myContainer addSubView:labelBackground];
Another solution might be to use your image as a background color for your label:
[myLabel setBackgroundColor:[UIColor colorWithPatternImage:myUIImage]];
But note that the image will be repeated instead of centered or stretched.
Try adding the UILabel as a subview of the UIImageView, rather than the other way around.
This will result in the UIImageView being the "container" of the label, and thus the label being on top of the UIImageView.
I want to make the tabbar transparent and leave the icons still there. So that when you look at it the icons on the tabbar look like they are their by themselves. Whats the code for me to do this? Right now this is the code i have
UIImage* tabBarBackground = [UIImage imageNamed:#""];
[[UITabBar appearance] setBackgroundImage:tabBarBackground];
[[UITabBar appearance] setSelectionIndicatorImage:[UIImage imageNamed:#""]];
Try this code
- (void)viewDidLoad
{
[super viewDidLoad];
CGRect frame = CGRectMake(0.0, 0, self.view.bounds.size.width, 48);
UIView *trans_view = [[UIView alloc] initWithFrame:frame];
[trans_view setBackgroundColor:[[UIColor alloc] initWithRed:0.0
green:0.0
blue:0.0
alpha:0.5]];//you can change alpha value also
[tabBar1 insertSubview:trans_view atIndex:0];//tabBar1 = your tabbar reference
[trans_view release];
}
this link also will help you
The easiest way to make a tab bar transparent is by setting the tab bar background image to a transparent image in the interface builder.
You can get a transparent png image whose height and width is equal to the tab bar's from the net.
Note: By changing the alpha value, you actually end up dimming the tab bar's icons as well. Make sure this is what you want, otherwise using a transparent background image is a better option.
I need to make a simple scroll view in xcode with width of 280 and height of 80 and with images inside thats scrolls horizontally. i want to make this programmatically.
I assume you mean the UIScrollview, which has a guide written by apple found here:
http://developer.apple.com/library/ios/#documentation/uikit/reference/UIScrollView_Class/Reference/UIScrollView.html
A guide that I personally used was this one:
http://idevzilla.com/2010/09/16/uiscrollview-a-really-simple-tutorial/
I'll take you through the quick basics of adding the scrollview to your view and adding images to it.
I'm guessing you're new to Objective C, so I'll give you a quick guide. Firstly, you'll want to make a UIScrollView object. This is done by declaring the following:
UIScrollView *aScrollView = [[UIScrollView alloc] initWithFrame:CGRectMake (0,0,320,250)];
You'll notice I set the frame. The first two numbers of CGRectMake give you the x and y origin of the point while the last two numbers are for how wide and tall you want your object to be.
Afterwards, you'll want to add images to it. You'll need a UIImageview.
UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 320, 250)];
Note that I positioned the image at 0,0, giving it a height of a 250 and a width of 320. This ensures that it fills entire scrollview's initial view.
imageView.image = [UIImage imageNamed:#"foo.png"];
You'll attach an image to the imageView. But wait, there's more. So far you've created these objects but have not yet associated them with the view. So if we are in a ViewController class (you'll have to look up what that is), the ViewController contains a view. We can attach our objects to the view.
[aScrollView addSubview:imageView]; // Adds the image to the scrollview
[self.view addSubview:aScrollView]; // Adds the scrollview to the view.
If you want to add more images, you have to add them at different x origins. So our first added image was at 0,0. Our next added image should be at 320,0 (because the first image took up 320 pixels width).
UIImageView *secondImageView = [[UIImageView alloc] initWithFrame:CGRectMake(320, 0, 320, 250)];
secondImageView.image = [UIImage imageNamed:#"bar.png"];
[aScrollView addSubview:secondImageView];
There are a number of options for scrollview that you will want to explore. The ones I found useful were:
aScrollView.delegate = self; // For gesture callbacks
self.pagingEnabled = TRUE; // For one-at-a-time flick scrolling
self.showsHorizontalScrollIndicator = NO; // Cleaner look for some apps.
self.alwaysBounceHorizontal = TRUE; // Look it up.
I'm working on an iPad application. On the main screen there are 6 buttons which was created in IB. I'd like to arrange them dynamically from code, but I can't.
Already tried setting the frame/center of the objects, but they didn't move.
I have an array which holds the button outlets, and arrange them in a for loop.
Is there any suggestion?
thanks!
edit:
Here's some code(not the whole, but the rest is irrelevant now), how I loop through the buttons. Button outlets already set properly. The title of the buttons changes properly, also I can hide/show the buttons, but not the position.
If I'll just try some dummy code like:
tempBtn.frame = CGRectMake(100.0, 200.0, 60.0, 40.0);
nothing changes(but I suspect all the 6 buttons should be at the same position)
// I have this array, which contains the button outlets
tAddBtnArray = [NSArray ArrayWithObjects:tAddBtn1,tAddBtn2,tAddBtn3,tAddBtn4,tAddBtn5,tAddBtn6, nil];
//I loop through the array, set button title, and trying to change the y position
for(int i=0;i<6;i++){
UIButton *tempBtn = [tAddBtnArray objectAtIndex:i];
[tempField setText:#"Set some title"];
}
You can add uibbutons programatically in this way:
UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[button addTarget:self
action:#selector(yourMethod:)
forControlEvents:UIControlEventTouchDown];
[button setTitle:#"Jesus Gil y Gil" forState:UIControlStateNormal];
button.frame = CGRectMake(100.0, 200.0, 60.0, 40.0);
[view addSubview:button];
I bet I know what it is. Do you have autolayout enabled on the xib file? If so, the frame is being set, and then the constraints are being evaluated, which move the buttons back to where they were assigned.
You have two options:
Turn off autolayout, so that you can manage the frames yourself.
Leave autolayout on, but update the constraints as well as the frame.
I would suggest turning autolayout off, but I'm just not particularly fond of it, so it is just a preference.