I have a tableview that takes up more than the screen. Certain rows have an info button on them. When these are pressed, I want to give the user a message based on which row the info button was on. I want to show this message in a basic UIView that appears at the same spot on the screen every time (somewhat like a UIAlertView).
My problem is specifying the frame for the UIView so that it will show with the origin at a particular location on the screen. Trying to set the frame self.view.frame or [UIScreen mainScreen].bounds results in using the bounds of the whole scrollView or just the first visible element of the scrollView.
How can I make the view always appear in the same screen location?
You need to pass a static frame to your custom view. Like this
in didSelectRowAtIndexPathMethod
try this code ----
UIView *infoView = [[UIView alloc] initWithFrame:CGRectMake(10,10,100,100)];
UILabel *lblInfo = [UILabel alloc] initWithFrame:CGRectMake(5,5,40,21)];
lblInfo.text = #"your text here";
[infoView addSubView:lblInfo];
[lblInfo release];
[self.view addSubView:infoView];
[infoView release];
Related
In my app when the user slide down the UI-searchbar become disappear, which I want but when the user slide up I want UI-Search bar become visible at once.
I want to have code that tell me when the user had slide upward in tableview cell and enable the uisearch-bar.
You can use tableHeaderView for this type of work.
In your viewDidLoad write below code.
- (void)viewDidLoad
{
**// Take one view and subview that view in the tableview.**
UIView *viewsearch=[[UIView alloc]initWithFrame:CGRectMake(0,-10, 320,83)];
[self.Yourtablename addSubview:viewsearch];
**//Now take any controls which you want to show in your header. e.x label,button,searchbar**
UILabel *lbl1 = [[UILabel alloc] init];
[lbl1 setFrame:CGRectMake(0,5,100,20)];
lbl1.backgroundColor=[UIColor clearColor];
lbl1.textColor=[UIColor whiteColor];
lbl1.userInteractionEnabled=YES;
[viewsearch addSubview:lbl1];
lbl1.text= #"BUY THE NEW APPLE TV FROM THE APPSTORE";
**//Here is the code.With the help of this code when you scroll UP the headerview hide.**
self.Yourtablename.tableHeaderView = viewsearch;
self.Yourtablename.contentOffset = CGPointMake(0, CGRectGetHeight(viewsearch.frame));
}
May be it will help you.
How do I imitate this behavior in UITableView. Wherein, if I pull the table DOWN, the header sticks at the stop, but if I scroll the table UP, the header goes with it.
Like the app store.
(scrolling up)
(scrolling down)
You can use tableHeaderView for this type of work.
In your viewDidLoad write below code.
- (void)viewDidLoad
{
**// Take one view and subview that view in the tableview.**
UIView *viewsearch=[[UIView alloc]initWithFrame:CGRectMake(0,-10, 320,83)];
[self.Yourtablename addSubview:viewsearch];
**//Now take any controls which you want to show in your header. e.x label,button,searchbar**
UILabel *lbl1 = [[UILabel alloc] init];
[lbl1 setFrame:CGRectMake(0,5,100,20)];
lbl1.backgroundColor=[UIColor clearColor];
lbl1.textColor=[UIColor whiteColor];
lbl1.userInteractionEnabled=YES;
[viewsearch addSubview:lbl1];
lbl1.text= #"BUY THE NEW APPLE TV FROM THE APPSTORE";
**//Here is the code.With the help of this code when you scroll UP the headerview hide.**
self.tbluser.tableHeaderView = viewsearch;
self.tbluser.contentOffset = CGPointMake(0, CGRectGetHeight(viewsearch.frame));
}
May be it will help you.
I have a storyboard with a square imageView in the middle at: 280,140 (vertical)
When the application starts i am able to move this imageView by pressing buttons. I move the imageView using:
_mainImage.frame = CGRectMake(_mainImage.frame.origin.x + 2, _mainImage.frame.origin.y, _mainImage.frame.size.width, _mainImage.frame.size.height);
while the application is running i keep adding new imageViews to the mainView:
UIImageView *imgView;
imgView = [[UIImageView alloc] initWithFrame:CGRectMake(0, yCoordinate, 50, 10)];
imgView.backgroundColor = [UIColor whiteColor];
[self.view addSubview:imgView];
each time i call this code the square imageView i have placed in the middle and moved around, gets set back to its starting position. It seems like the mainView gets "reset" each time the addSubview gets called. Is there any way i can add a subview without having the mainView "reset"?
Most likely your view is set up using Autolayout (this is the default for storyboards or nibs) and when you add a new subview, a layout pass is performed which resets your views position back to that defined by its original constraints.
You should move your view by updating its constraints, or turn off Autolayout. There are lots of posts around explaining how to do either of these things.
I've got an UIScrollView with inside, some views loaded from a xib file.
The UIScrollView loads only three Views. The current, the left one and the right one.
For exemple, I have one view at the left and one view at the right of the current View. If I scroll to the right, the UIScrollView will delete the view to the left, scroll to the right to the new current View and load the new view to the right of the new current View.
In addition, I have a button outside the UIScrollView. When I click on it, it changes the background color of the current view displayed on the UIScrollView.
It works well but sometimes, I don't know why, when I click on the button to change the background color of the view is well changed, but the view is not refresh so the user can't see the change of background color.
The UIScrollView:
container = [[UIScrollView alloc] initWithFrame:frame];
[container setBackgroundColor:[UIColor clearColor]];
[container setCanCancelContentTouches:NO];
[container setClipsToBounds:NO];
[container setShowsHorizontalScrollIndicator:NO];
[container setPagingEnabled:YES];
The method call when I click on the button to change the background color of the current view
- (void)menuColor:(MenuPickerViewController *)controller didPickOption:(UIView *)button
{
// Get the object containing the data of the product linked with the view.
MyProduct *product = (MyProduct *)[MyProduct getProduct:[_slider getCurrentContentDisplayed]];
// Get the the superview of the button sender to have an access for the attributes of this button (color selected, ...)
ColorButtonMenu *colorView = (ColorButtonMenu *)[button superview];
// Get the current UIView displayed in the UIScrollView
MyView *myView = (MyView *)[self sliderGetViewWithID:[_slider getCurrentContentDisplayed] FromSlider:_slider];
// I check with debugger, the color is well setted
product.color = colorView.color;
// "border" is a view in my xib that I want change its background color.
IFPrint(#"myView.border backgorund color before: %#\n", myView.border.backgroundColor.description);
[myView.border setBackgroundColor:[Utilities colorFromHexString:colorView.color]];
[myView.border setNeedsDisplay];
IFPrint(#"myView.border backgorund color after: %#\n", myView.border.backgroundColor.description);
IFPrint(#"=== DEBUG ===\n");
IFPrint(#"isMainThread ? : %i\n", [NSThread isMainThread]); // Always return YES
IFPrint(#"myView: %#\n", myView); // Always return the address of a valid pointer
IFPrint(#"myView border: %#\n", myView.border); // Always return the address of a valid pointer
IFPrint(#"=============\n\n");
}
So, as you can see at the end of the method, I tried to call method setNeedsDisplay on the view loaded from a xib and the other view inside "border" but nothings work.
Moreover, my method is always called on the main thread.
Any suppositions ?
Thanks !
Edit:
Obviously, I have tested if the view return by sliderGetViewWithID is the correct view. All the attributes are well set. In my opinion it's truly a refresh problem.
are you sure the view you're trying to set background color for is actually visible? I guess it might be offscreen so you see nothing happening.
You might want to trap that event by finding the intersection between scrollview's bounds and myView's frame. if there's no intersection, that means myView is not actually visible.
so the code is:
BOOL intersects = CGRectIntersectsRect(scrollview.bounds, myView.frame);
if(intersects == NO)
{
NSLog(#"myView is offscreen");
}
Problem solved :
After setting the background color of the view. I remove the view from the UIScrollView and I re add it inside the UIScrollView. It's a bit tricky but it works good !
[myView removeFromSuperView];
[myScrollView addSubview:myView];
I am trying to setup a view programatically. Through preference I prefer to programme the views as opposed to using Interface Builder, I feel I have a better control for some reason...
I am setting up a view with two subviews and a button. What I am trying to acheive is the same view when the orientation changes. Initially I thought I needed to calculate the screen size then calculate some divisions to work out the changes, but it appears I can handle on UIViewAutoresizing***
The issue I experience is with the top margin. Here is my code for the subviews.
// Create sub view for Logo
UIView *logoView =[[UIView alloc] initWithFrame:CGRectMake(0,0,320,280)];
[logoView setBackgroundColor:[UIColor blueColor]];
logoView.autoresizingMask = UIViewAutoresizingFlexibleWidth|UIViewAutoresizingFlexibleHeight;
// Create sub view
UIView *buttonView =[[UIView alloc] initWithFrame:CGRectMake(0, logoView.bounds.size.height, 320,200)];
[buttonView setBackgroundColor:[UIColor redColor]];
buttonView.autoresizingMask = UIViewAutoresizingFlexibleWidth|UIViewAutoresizingFlexibleHeight|UIViewAutoresizingFlexibleTopMargin;
Here is a picture of portrait and landscape where you can see the issue, with the 'white' space.
You either want the two views (red and blue) to end up with a proportionate amount of space after the rotation:
logoView.autoresizingMask = UIViewAutoresizingFlexibleWidth|UIViewAutoresizingFlexibleHeight|UIViewAutoresizingFlexibleBottomMargin;
buttonView.autoresizingMask = UIViewAutoresizingFlexibleWidth|UIViewAutoresizingFlexibleHeight|UIViewAutoresizingFlexibleTopMargin;
Or you want the red view to end up the same size as it started out, and the blue view to adjust to make room for it:
logoView.autoresizingMask = UIViewAutoresizingFlexibleWidth|UIViewAutoresizingFlexibleHeight;
buttonView.autoresizingMask = UIViewAutoresizingFlexibleWidth|UIViewAutoresizingFlexibleTopMargin;
use autolayouts . U dont have to deal with any of these issues ...