How can i make controller1 slide up and down by creating slider in it
-(void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
switch (buttonIndex) {
case 0:{
//Devanagari view display
ButtonViewController *controller1 = [[ButtonViewController alloc]init];
controller1.delegate = self;
UINavigationController *navigationController = [[UINavigationController alloc]
initWithRootViewController:controller1];
navigationController.navigationBar.tintColor = [UIColor colorWithHue:2.0/12 saturation:2.0 brightness:4.0/10 alpha:1.0];
[self presentModalViewController:navigationController animated:YES];
[navigationController release];
break;
}
I got this from User Experience Coding How-To's from Apple Reference for creating slider
CGRect frame = CGRectMake(0.0, 0.0, 200.0, 10.0);
UISlider *slider = [[UISlider alloc] initWithFrame:frame];
[slider addTarget:self action:#selector(sliderAction:) forControlEvents:UIControlEventValueChanged];
[slider setBackgroundColor:[UIColor clearColor]];
slider.minimumValue = 0.0;
slider.maximumValue = 50.0;
slider.continuous = YES;
slider.value = 25.0;
I added this whole thing right below UIText View in controller1 but controller1 is not sliding up and down.
Appreciate help.
From what I can tell about what you are trying to do, I think you should be using a UIScrollView and taking control of its contentOffset property. I threw together a quick example app, hopefully its what you are trying to do.
http://cl.ly/2Z3D1D0W1m332y313v0A
Related
I'm playing around with a cameraOverLayView and encountered a weird behavior. Before presenting the UIImagePickerController, I set allowsEditing to YES. After the capture screen comes up, I tap on a button that triggers takePicture(). Instead of presenting the editing screen, the delegate method didFinishPickingMediaWithInfo() gets called right away. Can anyone help me figure out what I could be doing wrong? I pasted some of my code below...
Thanks!
- (BOOL)shouldStartCameraController {
if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera] == NO) {
return NO;
}
CGSize screenSize = [[UIScreen mainScreen] bounds].size;
float overlayOffset = 0;
if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone) {
if (screenSize.height > 480.0f) {
overlayOffset = 195;
} else {
overlayOffset = 103;
}
} else {
/*Do iPad stuff here.*/
}
UIImagePickerController *cameraUI = [[UIImagePickerController alloc] init];
if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]
&& [[UIImagePickerController availableMediaTypesForSourceType:
UIImagePickerControllerSourceTypeCamera] containsObject:(NSString *)kUTTypeImage]) {
cameraUI.mediaTypes = [NSArray arrayWithObject:(NSString *) kUTTypeImage];
cameraUI.sourceType = UIImagePickerControllerSourceTypeCamera;
if ([UIImagePickerController isCameraDeviceAvailable:UIImagePickerControllerCameraDeviceRear]) {
cameraUI.cameraDevice = UIImagePickerControllerCameraDeviceRear;
} else if ([UIImagePickerController isCameraDeviceAvailable:UIImagePickerControllerCameraDeviceFront]) {
cameraUI.cameraDevice = UIImagePickerControllerCameraDeviceFront;
}
} else {
return NO;
}
UIView *cameraOverlayView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, cameraUI.view.frame.size.width, cameraUI.view.frame.size.height)];
UIImageView *cameraOverlayImageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"iphone5_camera_overlay.png"]];
cameraOverlayImageView.frame = CGRectMake(0, 0, cameraUI.view.frame.size.width, cameraUI.view.frame.size.height);
[cameraOverlayView addSubview:cameraOverlayImageView];
UILabel *cameraLabel = [[UILabel alloc] initWithFrame:CGRectMake( 0.0f, self.view.bounds.size.height-overlayOffset, self.view.bounds.size.width, 50.0f)];
[cameraLabel setTextAlignment:NSTextAlignmentCenter];
[cameraLabel setBackgroundColor:[UIColor clearColor]];
[cameraLabel setTextColor:[UIColor whiteColor]];
[cameraLabel setShadowColor:[UIColor colorWithWhite:0.0f alpha:0.300f]];
[cameraLabel setShadowOffset:CGSizeMake( 0.0f, -1.0f)];
[cameraLabel setFont:[UIFont boldSystemFontOfSize:18.0f]];
[cameraOverlayView addSubview:cameraLabel];
UIButton *cancelButton = [UIButton buttonWithType:UIButtonTypeCustom];
[cancelButton addTarget:self action:#selector(cancelButtonPressed:) forControlEvents:UIControlEventTouchDown];
[cancelButton setFrame:CGRectMake(10, cameraOverlayView.frame.size.height-60, 50, 50)];
[cancelButton setBackgroundColor:[[UIColor whiteColor] colorWithAlphaComponent:0.5f]];
[cameraOverlayView addSubview:cancelButton];
UIButton *snapButton = [UIButton buttonWithType:UIButtonTypeCustom];
[snapButton addTarget:self action:#selector(takePictureButtonPressed:) forControlEvents:UIControlEventTouchDown];
[snapButton setFrame:CGRectMake(110, cameraOverlayView.frame.size.height-60, 100, 50)];
[snapButton setBackgroundColor:[[UIColor whiteColor] colorWithAlphaComponent:0.5f]];
[cameraOverlayView addSubview:snapButton];
cameraUI.allowsEditing = YES;
cameraUI.showsCameraControls = NO;
cameraUI.delegate = self;
self.imagePickerController = cameraUI;
[self presentModalViewController:cameraUI animated:YES];
return YES;
}
- (void)handleGesture:(UIGestureRecognizer *)gestureRecognizer {
[self shouldPresentPhotoCaptureController];
}
#pragma mark - UIBarButton Selectors
- (void)takePictureButtonPressed:(id)sender {
NSLog(#"takePictureButtonPressed...");
// TODO: take picture!
[self.imagePickerController takePicture];
}
Possible dublicate: How do I use [camera takePhoto] and edit using UIImagePicker - UIImagePickerController.allowsEditing = YES
According to takePicture: method in Apple documentation:
Use this method in conjunction with a custom overlay view to initiate the programmatic capture of a still image. This supports taking more than one picture without leaving the interface, but requires that you hide the default image picker controls.
Calling this method while an image is being captured has no effect. You must wait until the associated delegate object receives an imagePickerController:didFinishPickingMediaWithInfo: message before you can capture another picture.
It seems that this approach (custom overlay) it is configured in order to be managed by yourself. Even if "allowsEditing = YES" the taken picture will be directly sent to imagePickerController:didFinishPickingMediaWithInfo:.
Based on that if we want to edit the taken picture using our custom user interface we should create an according custom edit screen for that purpose.
I have many textViews on top of a scrollView and every textView has a custom button over it so that when user click that textView it should expand and when it click back then it should collapse to previous position.
what I'm thinking of doing is hide the smallTextView and show the expandedTextView when button is pressed and when the button is pressed i want to hide expandedtextView n show the smallTextView. but I don't know how I should do it. any help will be appreciated.
Here is my code:
-
(void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
self.title = #"Demo";
appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
for (int i=0;i<[appDelegate.serverResponseArray count];i++)
{
self.expandTextView = [[UITextView alloc] init];
[self.expandTextView setFrame:CGRectMake(8.0f, i*50.0f+10.0f, 270.0f, 40.0f)];
[self.expandTextView setBackgroundColor:[UIColor grayColor]];
[self.expandTextView setFont:[UIFont fontWithName:#"helvetica" size:12]];
[self.expandTextView setText:#"Welcome!!!"];
[self.expandTextView setTextColor:[UIColor colorWithRed:255.0f/255.0f green:255.0f/255.0f blue:255.0f/255.0f alpha:1]];
[self.expandTextView setUserInteractionEnabled:NO];
[self.scrollView addSubview:self.expandTextView];
self.expandTextView = nil;
self.expandButton = [[UIButton alloc]initWithFrame:CGRectMake(8.0f, i*50.0f+1.0f, 270.0f, 60.0f)];
[self.expandButton setBackgroundColor:[UIColor clearColor]];
[self.expandButton addTarget:self action:#selector(textButtonClicked:) forControlEvents:UIControlEventTouchUpInside];
self.expandButton.tag = i;
[self.scrollView addSubview:self.expandButton];
UIImageView *imageView = [[UIImageView alloc]initWithFrame:CGRectMake(278.0f, i*50.0f+10.0f, 14.0f, 40.0f)];
[imageView setBackgroundColor:[UIColor grayColor]];
[imageView setImage:[UIImage imageNamed:#"arrow.png"]];
[self.scrollView addSubview:imageView];
imageView = nil;
}
float maxHeight = 0;
for(UIView *v in [self.scrollView subviews])
{
if(v.frame.origin.x + v.frame.size.height > maxHeight)
maxHeight = v.frame.origin.x + v.frame.size.height;
}
self.scrollView.contentSize = CGSizeMake(_scrollView.frame.size.width, maxHeight+2570);
}
-(IBAction)textButtonClicked:(id)sender
{
NSLog(#"%#",sender);
}
and how do I know which button is getting pressed.
To know which button press you have to assign tag value to your button then
-(IBAction)textButtonClicked:(id)sender
{
UIButton *btn=(UIButton*)sender;
NSLog(#"Tag of button = %d",btn.tag);
}
And i suggest you to change frame of your existing imageView instead of using other image view(hide and show)
First of all , I'd suggest you to use UITableView instead of UIImageView and then implement Expandable and Collapsible UITableViewCell.
There are lots of Tutorial to implement this Functionality. Simply Google it and you will have plenty of solutions for that.
For Example : Expandable/Collapsible Table For iOS
Check this Sample Code provided by Apple : Table View Animations and Gestures.
The Best way is Take UITableView and Put your images on Cell of UITableView and change size of cell when your click on it, i give you simple example for how to create expandable UITableViewCell.
http://www.roostersoftstudios.com/2011/04/14/iphone-uitableview-with-animated-expanding-cells/
I want to set an image and a label at the center of my UINavigationBar, along all my navigation stack.
What I'm currently doing is adding it to my navigation item titleView.
The "problem" with this approach is that I have to call this method in the viewDidLoad for each view controller I push to my navigation stack.
The other way around is to add the UILable and UIImageView directly to the UINavigationBar, however that why I have to calculate the center myself, and in addition I read that's not the recommended approach.
Any Idea how to get what I want ?
My Code:
CGRect navTitle = controller.navigationController.navigationBar.bounds;
CGFloat aHeight = navTitle.size.height;
UIView* container = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 163, aHeight)];
UIImage* statusImg = [UIUtils getStatusImage];
UIImageView *statusImage = [[UIImageView alloc] initWithFrame:CGRectMake(0,aHeight/2-statusImg.size.height/2, 33., 32.)];
statusImage.autoresizingMask = UIViewAutoresizingNone;
statusImage.image = statusImg;
statusImage.backgroundColor = [UIColor clearColor];
[statusImage setTag:1];
[statusImage setHidden:NO];
initWithFrame:CGRectMake(statusImage.frame.origin.x + 33. + 3, 0, 130., navTitle.size.height)];
UILabel *titleLabel = [[UILabel alloc] initWithFrame:CGRectMake(statusImage.frame.origin.x + 33. + 3, 0, 130., navTitle.size.height)];
titleLabel.textAlignment = UITextAlignmentLeft;
titleLabel.lineBreakMode = UILineBreakModeTailTruncation;
titleLabel.textColor = [UIColor whiteColor];
titleLabel.font = [UIFont boldSystemFontOfSize:20.];
titleLabel.shadowOffset = CGSizeMake(1, -1);
titleLabel.opaque = NO;
titleLabel.backgroundColor = [UIColor clearColor];
[titleLabel setTag:2];
[container addSubview:statusImage];
[container addSubview:titleLabel];
controller.navigationItem.titleView = container;
[statusImage release];
[titleLabel release];
[container release];
Found the a nice way to do it :
Registering yourself as the delegate of UINavigationController will let you receive a callback each time a new controller is about to be pushed.
- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated
Inside that function, getting the viewController and operating on his navigationitem will do the trick.
problem in adding second UIbutton in cameraOverlayView ,here i am able to add the first button but not able to add second button with following code
- (void)pickAndDecodeFromSource:(UIImagePickerControllerSourceType) sourceType {
[self reset];
// Create the Image Picker
if ([UIImagePickerController isSourceTypeAvailable:sourceType]) {
UIImagePickerController* aPicker =
[[[UIImagePickerController alloc] init] autorelease];
aPicker.sourceType = sourceType;
aPicker.delegate = self;
self.picker = aPicker;
// [[NSUserDefaults standardUserDefaults] boolForKey:#"allowEditing"];
BOOL isCamera = (sourceType == UIImagePickerControllerSourceTypeCamera);
if ([picker respondsToSelector:#selector(setAllowsEditing:)]) {
// not in 3.0
[picker setAllowsEditing:!isCamera];
}
if (isCamera) {
if ([picker respondsToSelector:#selector(setShowsCameraControls:)]) {
[picker setShowsCameraControls:NO];
UIButton *cancelButton =
[UIButton buttonWithType:UIButtonTypeRoundedRect];
NSString *cancelString =
NSLocalizedString(#"DecoderViewController cancel button title", #"");
CGFloat height = [UIFont systemFontSize];
CGSize size =
[cancelString sizeWithFont:[UIFont systemFontOfSize:height]];
[cancelButton setTitle:cancelString forState:UIControlStateNormal];
//cancelButton.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:#"CancelButtonForButton.png"]];
//cancelButton.backgroundColor = [UIColor clearColor];
//cancelButton.backgroundColor = [UIColor greenColor];
[cancelButton setImage:[UIImage imageNamed:#"cancelForButton.png"] forState:UIControlStateNormal];
//[cancelButton setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
CGRect appFrame = [[UIScreen mainScreen] bounds];
static const int kMargin = 10;
static const int kInternalXMargin = 10;
static const int kInternalYMargin = 10;
CGRect frame = CGRectMake(kMargin,
appFrame.size.height - (height + 2*kInternalYMargin + kMargin),
2*kInternalXMargin + size.width,
height + 2*kInternalYMargin);
[cancelButton setFrame:frame];
[cancelButton addTarget:self
action:#selector(cancel:)
forControlEvents:UIControlEventTouchUpInside];
picker.cameraOverlayView = cancelButton;
// The camera takes quite a while to start up. Hence the 2 second delay.
[self performSelector:#selector(takeScreenshot)
withObject:nil
afterDelay:2.0];
//cancelButton.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:#"bg.png"]];
}
}
// Picker is displayed asynchronously.
[self presentModalViewController:picker animated:YES];
} else {
NSLog(#"Attempted to pick an image with illegal source type '%d'", sourceType);
}
}
The issue is that you are replacing the camera overlay with the first button - so creating the second button and using "picker.cameraOverlayView = newButton;" replaces the camera-overlay again.
The solution is to create a parent UIView, add both buttons to it, and then set the camera overlay to be the parent UIView.
I have pushed view controller and load WebView and Custom rectangular rounded button on right down left corner into view using programmatic way.
-(void)loadView {
CGRect frame = CGRectMake(0.0, 0.0, 480, 320);
WebView = [[[UIWebView alloc] initWithFrame:frame] autorelease];
WebView.backgroundColor = [UIColor whiteColor];
WebView.scalesPageToFit = YES;
WebView.autoresizingMask = (UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleTopMargin);
WebView.autoresizesSubviews = YES;
WebView.exclusiveTouch = YES;
WebView.clearsContextBeforeDrawing = YES;
self.roundedButtonType = [[UIButton buttonWithType:UIButtonTypeRoundedRect] retain];
self.roundedButtonType.frame = CGRectMake(416.0, 270.0, 44, 19);
[self.roundedButtonType setTitle:#"Back" forState:UIControlStateNormal];
self.roundedButtonType.backgroundColor = [UIColor grayColor];
[self.roundedButtonType addTarget:self action:#selector(back:) forControlEvents:UIControlEventTouchUpInside];
self.view = WebView;
[self.view addSubview: self.roundedButtonType ];
[WebView release];
}
This is action that I have added as back button of navigation.
-(void)back:(id)sender{
[self.navigationController popViewControllerAnimated:YES];
}
-(void)viewDidUnload{
self.WebView = nil;
self.roundedButtonType = nil;
}
-(void)dealloc{
[roundedButtonType release];
[super dealloc];
}
Here, When Back button click then it is showing previous view but application got stuck in that view and GDB shows Program received signal :EXC_BAD_ACCESS message.
how resolve this issue?
Thanks,
You have -autorelease'd WebView here:
WebView = [[[UIWebView alloc] initWithFrame:frame] autorelease];
but then you -release it again!
[self.view addSubview: self.roundedButtonType ];
[WebView release];
Try to remove one of the releases.
Also,
self.roundedButtonType = [[UIButton buttonWithType:UIButtonTypeRoundedRect] retain];
unless roundedButtonType is declared as #property(assign,...), you don't need to send the -retain message. And it's better to setup the frame, title, etc. before assigning to self.roundedButtonType, because every call to self.roundedButtonType is not free.