I just did it like this
-(IBAction)clickButtonPressed:(id)sender
{
NSLog(#"Clicked.........");
UIView *showView=[[UIView alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];
[self.view addSubview:showView];
}
This action called & There were no any error coming but this view is also not shown.
Try setting the view's background color to make sure that it is not actually added without you noticing, also release your view after adding it (if you are not using ARC)
-(IBAction)clickButtonPressed:(id)sender {
NSLog(#"Clicked.........");
UIView *showView=[[UIView alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];
showView.backgroundColor = [UIColor blackColor];
[self.view addSubview:showView];
[showView release]; // if not ARC
}
Related
I have a UIViewController that contains two picker views. For some reason when I run the project one picker view is overshadowing the other. How can I set the positions, height and other parameters in code?
Why are you using two picker view ? You can change the content of the pickerview when needed.
Even if u want to use two of them, the picker would be at the bottom anyways. Use show and hide property of the pickerview to handle your required task
You have to implement -initWithFrame: method (assuming that you're instantiating the view in code). Here's an example showing to picker views -
UIPickerView *myPickerView1 = [[UIPickerView alloc] initWithFrame:CGRectMake(0, 0, 320, 320)];
[self.view addSubview:myPickerView1];
UIPickerView *myPickerView2 = [[UIPickerView alloc] initWithFrame:CGRectMake(0, 200, 320, 320)];
[self.view addSubview:myPickerView2];
If you see this image below, they are not overshadowing one another. I hope this easy explanation helps. Welcome to iOS Development!
you can do this way
//first picker
optionPicker1 = [[UIPickerView alloc] initWithFrame:CGRectMake(0, 44, 320, 200)];
[self.view addSubview:optionPicker1];
//second picker
optionPicker2 = [[UIPickerView alloc] initWithFrame:CGRectMake(0, 200, 320, 200)];
[self.view addSubview:optionPicker2];
I am trying to add a UILabel programmatically into my UIToolBar but it dose not seem to be appearing. This is what I am doing with my code.
- (void) viewWillAppear:(BOOL)animated
{
// Create custom toolbar at top of screen under navigation controller
[matchingSeriesInfoToolBar setFrame:CGRectMake(0, 60, 320, 30)];
matchingSeriesInfoToolBar = [UIToolbar new];
[matchingSeriesInfoToolBar sizeToFit];
CGFloat toolbarHeight = 30;
CGRect mainViewBounds = [[UIScreen mainScreen] applicationFrame];
[matchingSeriesInfoToolBar setFrame:CGRectMake(CGRectGetMinX(mainViewBounds), 0, CGRectGetWidth(mainViewBounds), toolbarHeight)];
matchingSeriesInfoToolBar.tintColor = [UIColor darkGrayColor];
[self.view addSubview:matchingSeriesInfoToolBar];
// Create size of uitableview (to fit toolbar.
[matchingSeriesTableView setFrame:CGRectMake(0, 30, self.view.frame.size.width, self.view.frame.size.height - 30)];
[self.view addSubview:matchingSeriesTableView];
// Ad UILabel to the toolbar
UIBarButtonItem *textFieldItem = [[UIBarButtonItem alloc] initWithCustomView:manufSelectionLabel];
matchingSeriesInfoToolBar.items = [NSArray arrayWithObject:textFieldItem];
manufSelectionLabel.text = #"Hello World!";
[super viewWillAppear:animated];
}
So pretty much I have created a custom toolbar which I have changed the usual location from the bottom of the screen, to appear under the UINavigationController, this is also added to the view like this so it animated properly in the view transitions..
After which I create the size of the tableview so that it appears after the custom toolbar..
then from there I am trying to add a UILabel to the toolbar.. but for some reason its not working out.
Any help would be greatly appreciated.
You must actually create the label somewhere. This code works just fine.
UIToolbar *toolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, 320, 44)];
[self.view addSubview:toolbar];
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 100, 44)];
label.backgroundColor = [UIColor clearColor];
UIBarButtonItem *item = [[UIBarButtonItem alloc] initWithCustomView:label];
toolbar.items = [NSArray arrayWithObject:item];
label.text = #"Hello World";
In the code you posted you don't ever make a UILabel. Your comment says Ad UILabel to the toolbar but you then proceed to make a UIBarButtonItem with a custom view manufSectionLabel.
Where is the code which creates manufSectionLabel?
PS This line does nothing :
[matchingSeriesInfoToolBar setFrame:CGRectMake(0, 60, 320, 30)];
because at that point matchingSeriesInfoToolbar is nil - you haven't made it yet!
I have a subview that shows once a button is pushed and it shows up fine. I have the subview showing a label along with it. I am just lost on how to change the background color of it and give it some transparency by adjusting it's alpha and setting the label's text color to something else. I know this is just like three to four lines of simple code but I'm at a lost now.
Here is my code:
- (IBAction)showInfo:(id)sender
{
UIView *mySubview = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 200, 200)];
[self.view addSubview:mySubview];
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(10, 10, 300, 50)];
label.text = #"This is a label";
[self.view addSubview:label];
}
It all runs fine, I'm just missing some pieces
Try out this code:
mySubview.backgroundColor = [UIColor colorWithRed:.5 green:.6 blue:.7 alpha.8]; // for example
label.textColor = [UIColor redColor];
Hope this help you.
I have a 320x460 view with a number of buttons, depending on the button pressed, a 280x280 view pops up over the 320x460 view (similar to the behavior of the UIAlertView) using code like this:
UIView *overlayView = [[UIView alloc] initWithFrame:CGRectMake(20, 200, 280, 280)];
overlayView.backgroundColor = [UIColor whiteColor];
[overlayView autorelease];
[overlayView addSubview:label]; // label declared elsewhere
[overlayView addSubview:backgroundImage]; // backgroundImage declared elsewhere
//... Add a bunch of other controls
[label release];
[backgroundImage release];
//... Release a bunch of other controls
[self.view addSubview:overlayView];
Everything works fine displaying the overlayView and all its controls.
The question I have is, how do I get rid of the overlayView once it's displayed? I want to make it not only not visible but to remove it completely, since the user will be popping up the overlayView repeatedly during use.
You need access to overlayView to remove it, I'd suggest adding this to the create side:
overlayView.tag = 5; // Or some other non-zero number
Then later you can use it like this:
-(void)removeOverlayView
{
UIView *overlayView = [self.view viewWithTag:5];
[overlayView removeFromSuperview];
}
I am wanting to show a simple loading dialog when certain things are happening in my app. I figured I would just create a new view, add a label to that, and then set that view to a subView of my current view.
When doing this, I don't see anything!
Here is how I am writing my method:
- (void)showLoading {
UIView *loading = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 200, 200)];
loading.backgroundColor = [UIColor blackColor];
UILabel *txt = [[UILabel alloc] initWithFrame:CGRectMake(198, 9, 94, 27)];
txt.text = #"Loading...";
txt.textColor = [UIColor whiteColor];
[loading addSubview:txt];
[super.view addSubview:loading];
[super.view bringSubviewToFront:loading];
[loading release];
[txt release];
}
Am I doing this completely wrong?
EDIT:
I added it to the viewDidLoad method, and it works how I want:
loading = [[UIView alloc] initWithFrame:CGRectMake(100, 100, 200, 200)];
loading.backgroundColor = [UIColor blackColor];
UILabel *txt = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 94, 27)];
txt.text = #"Loading...";
txt.textColor = [UIColor whiteColor];
[loading addSubview:txt];
[txt release];
[self.view addSubview:loading];
[self.view bringSubviewToFront:loading];
But when loading it from a method, it seems to lag, and not show up for a bit.
Although this doesn't directly answer your question, I'd recommend grabbing MBProgressHUD from GitHub and using that in place of a static label. Looks better, less code for you to directly maintain, etc. You can find it at http://github.com/matej/MBProgressHUD
The way I use it is by creating a subclass of UITableViewController and defining a handful of methods to show and hide the HUD view. From there, I call each relevant method when I'm loading or done loading.
Specifically, I have four methods: -hudView, -showLoadingUI, -showLoadingUIWithText:, and -hideLoadingUI.
-hudView creates a new MBProgressHUD object if one doesn't already exist, and adds it to the current view ([self.view addSubview:hudView]).
-showLoadingUI calls -showLoadingUIWithText: with a default title, -showLoadingUIWithText: just unhides the MBProgressHUD and sets a label value for it (self.hudView.labelText = #"foo";).
-hideLoadingUI hides the hudView ([self.hudView hide:YES]).
First, I don't think UIView has method called init. You may just call the super of it. The appropriate method you should call is - (id)initWithFrame:(CGRect)aRect . The frame is the position, the size of the View you want to display. More here
Another thing is why you call [super.view addSubView:], I think it should be self.view, isn't it?