For the first time working with CorePlot (after a couple of hours trying to set it up :P )
on my view, i have a tableview. when a certain IBAction is called i want to show another view (a graph) instead of the tableview.
my approach was to add a subview with the same size to the tableview. it works fine to display the graph, but when i remove the graphs view from [table subviews] the tableview does not reappear.
note:
expenseTable: my tableView
hasSubView: (BOOL) that indicates if a graph is shown right now or not
code
-(IBAction)displayDayBalanceGraph:(id)sender{
if (hasSubView) {
[[expenseTable subviews] makeObjectsPerformSelector: #selector(removeFromSuperview)];
NSLog(#"%#",expenseTable.subviews);
}
else{
[self initializeMonthArray];
CPTGraphHostingView *host = [self buildGraphView];
[expenseTable addSubview:host];
CPTXYGraph *graph = [[CPTXYGraph alloc ]initWithFrame:host.frame];
host.hostedGraph = graph;
CPTScatterPlot *plot = [[CPTScatterPlot alloc]init ];
plot.dataSource = self;
[graph addPlot:plot];
[expenseTable reloadData];
hasSubView = !hasSubView;
}
}
-(CPTGraphHostingView *)buildGraphView{
CPTGraphHostingView *view = [[CPTGraphHostingView alloc]initWithFrame:CGRectMake(0, 0, 312, 260)];
[view setBackgroundColor:[self grayColor]];
return view;
}
1st Screenshot: TableView displayed
2nd Screenshot: GraphView displayed
sidenote: this is a sampleplot =)
3rd Screenshot: GraphView dismissed
has anyone an idea what i missed? (or messed ;) )
It's not generally a good idea to add views as subviews of UITableView.
Instead, you could either remove the table view and replace it with the Core Plot view:
[tableView removeFromSuperview];
[containerView addSubview:corePlotView];
Make sure you have a reference to the table view somewhere or it will be released.
Related
My main aim is to have one background for all of my ViewControllers. Every ViewController I have has a clear background.
To do this, I have made one UIViewController (called backgroundViewController) that will act as the subview to all my other ViewControllers. It has one UIImageView which displays this particular background. I will then add this backgroundViewController as a subview of all my other ViewControllers.
The problem is - this imageView won't show as a subview!
This is how I display the imageView:
- (void)viewDidLoad
{
if ([musicPlayer playbackState] == MPMusicPlaybackStateStopped) {
UIImage *artworkBackgroundView;
artworkBackgroundView = [UIImage imageNamed:#"noArtworkBackground"];
UIImage *effectImage = nil;
backgroundView.image = effectImage;
[backgroundView setImage:artworkBackgroundView];
backgroundView.image = effectImage;
}
}
- (void) handle_NowPlayingItemChanged: (id) notification
{
if ([musicPlayer playbackState] != MPMusicPlaybackStateStopped) {
// Get artwork for current now playing item
MPMediaItem *currentItem = [musicPlayer nowPlayingItem];
MPMediaItemArtwork *artwork = [currentItem valueForProperty: MPMediaItemPropertyArtwork];
UIImage *artworkBackgroundView = [artwork imageWithSize: CGSizeMake(618, 618)];
if (!artworkImage) {
artworkBackgroundView = [UIImage imageNamed:#"noArtworkBackground"];
artworkImage = [UIImage imageNamed:#"noArtwork"];
}
[backgroundView setImage:artworkBackgroundView];
}
}
As you can see, backgroundView changes each time the music player skips song.
To test that backgroundViewController does show as a subview, I added another imageView and changed its image to a static .png in Interface Builder, and that shows correctly as a subview.
This is how I make it a subview for other ViewControllers:
backgroundViewController *backgroundVC = [[backgroundViewController alloc] initWithNibName:#"backgroundViewController" bundle:nil];
[self.view insertSubview:backgroundVC.view atIndex:0];
What I want is the UIImageView called backgroundView to show up when it is being called as subview.
I have tested that backgroundView does change according to what song is playing, and it works correctly.
What am I doing wrong? backgroundView refuses to show up as a subview?! I've searched a ton about adding ViewControllers as subviews but I can't find a similar problem.
Any help would be much appreciated, thanks! :)
This worked for me:
backgroundViewController *backgroundVC = [[backgroundViewController alloc] initWithNibName:#"backgroundViewController" bundle:nil];
[self addChildViewController:backgroundVC];
[self.view addSubview:backgroundVC.view];
I found the solution here. I need to read more about 'Custom Containers'.
When I addSubview: nothing shows up. I set text and color to see it. Also if I manually add the view to the custom view in the UI bulder in xcode it shows up just fine with the text and color.
.m file
- (void)displayString:(NSString *)title {
NSRect frame = NSMakeRect(10, 10, 200, 17);
NSTextfield *newfield = [[NSTextField alloc] initWithFrame:frame];
[newfield setBezeled:NO];
[newfield setDrawsBackground:NO];
[newfield setEditable:NO];
[newfield setSelectable:NO];
[newfield setStringValue:title];
[newfield setTextColor:[NSColor blueColor]];
[test addSubview:newfield];
if([test.subviews containsObject:newfield]){
NSLog(#"view there"); // i get this message
}
if([newfield isHidden]){
NSLog(#"view hidden"); //i dont get this message
}
NSLog(#"view set");
}
test is a NSView (Custom view is what xcode calls it) that I have properly linked in.
So when I create the text field and add it to the NSView manually and then run that same code by adding text and color all works fine, this issue arrises when I try programmatically setting the view. Also I made sure it wasn't my creating of the view, as I have tried creating the view in the builder and not placing it in the NSView and then trying addSubview: but that also does not work. Let me know if you need more code.
DEVELOPMENT:
If the nsview (custom view) has an element already in it (manually added and can be anything) and I add the text field it works (I get both views in the nsview)? The subview is tested for and there, just cant see it.
You have to call initWithFrame: instead of just init
- (void)displayString:(NSString *)title {
NSRect frame = NSMakeRect(10, 10, 200, 200);
NSTextField *newfield = [[NSTextField alloc] initWithFrame:frame];
[newfield setStringValue:title];
[newfield setTextColor:[NSColor blueColor]];
[test addSubview:newfield];
NSLog(#"view set");
}
What type of view is test? Also you need to do a:
newfield.frame = CGRectMake(x,y,width,height)
in order to specify the look of the view
Turns out I set the view too early. I was under the impression that whatever you do to the view after its been set will be reflected on the view, but that seemed to be the issue. After altering the view to be exactly they way I want then set the view of the NSStatuditem.
so I get
[newfield setStringValue:title];
[newfield setTextColor:[NSColor blueColor]];
[test addSubview:newfield];
[statusItem setView:test];//this is the key, setting it after he changes.
What I have:
Basically I have collection of UIViews presented in horizontal scrollView. UIScrollView have paging enabled and each item is not full screen so I can see part of previous and next view based on this.
Each view have delete button on itself.
What I need:
I need to find good idea to animate reloading UIScrollView content after removing one of the subview. As I thought about it there will be 4 different kinds of deletion:
1. deletion of last view
2. deletion of first view
3. deletion of middle view - hardest one
4. deletion of only view - easiest one, just animation of view disappearing
I need some suggestions/solutions.
Thanks,
Michal
edit:
Ok, I havent implemented it fully.
Here is reload method:
- (void)loadScrollView{
for(UIView* view in [_scrollView subviews])
{
[view removeFromSuperview];
}
CGRect frame = self.scrollView.frame;
frame.origin.x = 0;
frame.origin.y = 0;
int i = 0;
_scrollView.clipsToBounds = NO;
_scrollView.pagingEnabled = YES;
_scrollView.showsHorizontalScrollIndicator = NO;
for(MPContact* contact in self.items)
{
frame.origin.x = self.scrollView.frame.size.width*i;
MyView *view = [[[NSBundle mainBundle] loadNibNamed:#"MyView" owner:self options:nil] objectAtIndex:0];
[view setFrame:frame];
i++;
[view.nameAndSurnameLabel setText:#"view text"];
[view setDelegate:self];
[self.scrollView addSubview:view];[self.viewsArray addObject:view];
}[self.scrollView setContentSize:CGSizeMake(frame.size.width*[self.items count], frame.size.height)];}
Each MyView have delete button with delegate, delegate removes view from viewsArray and run this method for now.
I suggest you to use + (void)animateWithDuration:(NSTimeInterval)duration animations:(void (^)(void))animations completion:(void (^)(BOOL finished))completion method of UIView class. Just get your UIView that you want to delete, from UIScrollView and set view.alpha = 0 in animations block. In completion block remove this UIView from UIScrollView, using removeFromSuperView method. Setting alpha to 0 will make fade animation.
EDIT:
Iterate all your views you want to move and change it's x coordinate.
for(UIView *view in scrollview.subviews)
{
[UIView animateWithDuration:0.1 animations:^{
[view setFrame:CGRectMake(view.x-(/*HERE YOU NEED TO PUT WIDTH OF TOUR DELETING VIEW*/),view.y,view.width,view.heigh)];
}
completion:^(BOOL finished){
//remove view from superview and change your uiscrollview's content offset.
}];
}
I have a situation here please help me out in this,
1) I have a Table with custom cells
2) Each cell has 2 search bars and 2 lables.
what I was attempting is suppose a user beginEditing a searchBar a popover should appear pointing that search bar.
I have implemented this but popover is not appearing over the desired searchBar moreover height of popover is also too long sometime
if (searchBar.tag==10) {
NSLog(#"Display date popover");
CGRect pickerFrame = CGRectMake(0,0,300,200);
UIViewController *tempDateViewController=[[UIViewController alloc] init];
UIDatePicker *datePicker = [[UIDatePicker alloc] initWithFrame:pickerFrame];
[datePicker addTarget:self action:#selector(pickerChanged:) forControlEvents:UIControlEventValueChanged];
[tempDateViewController.view addSubview:datePicker];
if(!currentPopover)
{
currentPopover=[[UIPopoverController alloc] initWithContentViewController:tempDateViewController];
}
else {
[currentPopover setContentViewController:tempDateViewController animated:YES];
}
tempDateViewController.contentSizeForViewInPopover=CGSizeMake(320, 300);
[datePicker release];
[tempDateViewController release];
[currentPopover presentPopoverFromRect:searchBar.frame inView:self.view permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
}
Please help me to solve this one.
Thanx in advance.
The searchBar is inside a cell which is in a table view (which may be in some other view depending on your layout). The problem most likely is that self.view is not the direct parent of searchBar where you are calling this. So using the frame of the searchBar in self.view will give unexpected results.
Instead of using self.view and trying to figure out where the searchBar is relative to that, you can use the searchBar itself for the "inView" and for the "rect", use the searchBar's bounds:
[currentPopover presentPopoverFromRect:searchBar.bounds inView:searchBar
permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
Next, to fix the height of the popover, try setting the popover's popoverContentSize instead of the view controller's contentSizeForViewInPopover:
//tempDateViewController.contentSizeForViewInPopover=CGSizeMake(320, 300);
currentPopover.popoverContentSize = CGSizeMake(320, 300);
Finally, a separate issue but, the minimum height for a datepicker should be 216, not 200:
CGRect pickerFrame = CGRectMake(0,0,300,216);
I have a UIViewController class where I create a UIView instance.
And then I initialize (means fill) it with 25 subviews each containing an image (1, 2, ..., 25). Then after clicking 5 times in these image I called a function where I used
for(UIView *subview in [contentView subviews]) {
[subview removeFromSuperview];//ContentView name of my view
}
to remove the previously added subview. And then I use the same approch to
add 25 new subviews (image 1,2,3,....25). But this time no subview is added.
Can someone plz give me full code of adding & removing subview.
I have used the following code when I first add subview
//create main window
contentView = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]];
contentView.backgroundColor = [UIColor blackColor];
self.view = contentView;
[contentView release];
//adding 25 subview 1st time
int a=0;
int b=0;
for (int i = 0; i < 26; i++)
{
CGRect dragRect = CGRectMake(0.0f, 0.0f, x, y);
dragRect.origin = CGPointMake(a,b);
DragView *dragger = [[DragView alloc] initWithFrame:dragRect];
NSString *Flower = [[NSArray arrayWithObjects:#"1.png", #"2.png", #"3.png",#"4.png", #"5.png", #"6.png",#"7.png",#"8.png", #"9.png",#"10.png", #"11.png", #"12.png",#"13.png",#"14.png",#"15.png",#"16.png",#"17.png",#"18.png",#"19.png",#"20.png",#"21.png",#"22.png",#"23.png",#"24.png",#"25.png",#"26.png", nil] objectAtIndex:i];
[dragger setImage:[UIImage imageNamed:Flower]];
[dragger setUserInteractionEnabled:YES];
[self.view addSubview:dragger];
[dragger release];
a+=10;
b+=10;
}
//then removing 25 subview
//adding 25 subview 2nd times
I used the same approch to add the second time as first time, but the problem is that when I remove 25 subview and then add 25 subview, these subview are not added/shown, the view remain same. I am tired with these problem. plz someone help me.
The problem might be the way you remove the old views. You are modifying an array while iterating over it, which does not work. Try this code to remove the old views:
UIView* subview;
while ((subview = [[contentView subviews] lastObject]) != nil)
[subview removeFromSuperview];
A nice one liner is:
[view.subviews makeObjectsPerformSelector:#selector(removeFromSuperview)];
Looking at your code, I can suggest the following changes. There's one line in your for loop which is terribly inefficient:
NSString *Flower = [[NSArray arrayWithObjects:#"1.png", #"2.png", #"3.png",#"4.png", #"5.png", #"6.png",#"7.png",#"8.png", #"9.png",#"10.png", #"11.png", #"12.png",#"13.png",#"14.png",#"15.png",#"16.png",#"17.png",#"18.png",#"19.png",#"20.png",#"21.png",#"22.png",#"23.png",#"24.png",#"25.png",#"26.png", nil] objectAtIndex:i];
[dragger setImage:[UIImage imageNamed:Flower]];
Either take the Flower initialisation out of the the for loop (to only create the array once) or do the following:
[dragger setImage:[UIImage imageNamed:[NSString stringWithFormat:#"%d.png", i]]];
The code itself looks like it should work though. If you add 26 subviews then remove the 26 subviews then add the 26 subviews in exactly the same way then it should display as you'd expect.