UIView, UIScrollView and UITextFields problem calling Method - iphone-sdk-3.0

I have a view with several embedded UITextFields, this UIView is subordinated to a UIScrollView in IB. Each text field is supposed to invoke a method called updateText defined in the viewcontroller implementation file when the user is done editing the field. For some reason, the method updateText never gets invoked. Anyone have any ideas how to go about fixing this? The method fired off just fine when the UIScrollView was not present in the project but the keyboard would cover the text fields during input, which was annoying. Now my textfields move up above the keyboard when it appears, but won't fire off the method when done editing.
Here is my implementation file:
#import "MileMarkerViewController.h"
#implementation MileMarkerViewController
#synthesize scrollView,milemarkerLogDate,milemarkerDesc,milemarkerOdobeg,milemarkerOdoend,milemarkerBusiness,milemarkerPersonal,milemarker;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
if (self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]) {
// Initialization code
}
return self;
}
- (BOOL) textFieldShouldReturn: (UITextField*) theTextField {
return [theTextField resignFirstResponder];
}
- (void)viewDidLoad {
[super viewDidLoad];
[[NSNotificationCenter defaultCenter] addObserver: self
selector: #selector(keyboardWasShown:)
name: UIKeyboardDidShowNotification
object: nil];
[[NSNotificationCenter defaultCenter] addObserver: self
selector: #selector(keyboardWasHidden:)
name: UIKeyboardDidHideNotification
object: nil];
keyboardShown = NO; // 1
[scrollView setContentSize: CGSizeMake( 320, 480)]; // 2
}
- (void)keyboardWasShown:(NSNotification*)aNotification {
if (keyboardShown) return;
NSDictionary* info = [aNotification userInfo];
// Get the size of the keyboard.
NSValue* aValue = [info objectForKey:UIKeyboardBoundsUserInfoKey];
CGSize keyboardSize = [aValue CGRectValue].size;
// Resize the scroll view (which is the root view of the window)
CGRect viewFrame = [scrollView frame];
viewFrame.size.height -= keyboardSize.height;
scrollView.frame = viewFrame;
// Scroll the active text field into view.
CGRect textFieldRect = [activeField frame];
[scrollView scrollRectToVisible:textFieldRect animated:YES];
keyboardShown = YES;
}
- (void)keyboardWasHidden:(NSNotification*)aNotification {
NSDictionary* info = [aNotification userInfo];
// Get the size of the keyboard.
NSValue* aValue = [info objectForKey:UIKeyboardBoundsUserInfoKey];
CGSize keyboardSize = [aValue CGRectValue].size;
// Reset the height of the scroll view to its original value
CGRect viewFrame = [scrollView frame];
viewFrame.size.height += keyboardSize.height;
[scrollView scrollRectToVisible:CGRectMake(0, 0, 1, 1) animated:YES];
scrollView.frame = viewFrame;
keyboardShown = NO;
}
- (void)textFieldDidBeginEditing:(UITextField *)textField {
activeField = textField;
}
- (void)textFieldDidEndEditing:(UITextField *)textField {
activeField = nil;
}
- (IBAction)updateText:(id) sender {
NSLog(#"You just entered: %#",self.milemarkerLogDate.text);
self.milemarker.logdate = self.milemarkerLogDate.text;
self.milemarker.desc = self.milemarkerDesc.text;
self.milemarker.odobeg = self.milemarkerOdobeg.text;
self.milemarker.odoend = self.milemarkerOdoend.text;
self.milemarker.business = self.milemarkerBusiness.text;
self.milemarker.personal = self.milemarkerPersonal.text;
NSLog(#"Original textfield is set to: %#",self.milemarker.logdate);
[self.milemarker updateText];
}
- (void)didReceiveMemoryWarning {
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Release any cached data, images, etc that aren't in use.
}
- (void)dealloc {
[super dealloc];
}
#end

I think you have already known a solution because of post date.
You can implement textFieldShouldReturn method and resign first responder from textField in the method.
textFieldDidEndEditing is called after textField resign first responder.

Related

Animating custom property

I'm trying to animate a custom property, and as I've seen on several sources it seems this would be the way to go, but I'm missing something. Here's the CALayer subclass:
#implementation HyNavigationLineLayer
#dynamic offset;
- (instancetype)initWithLayer:(id)layer
{
self = [super initWithLayer:layer];
if (self) {
HyNavigationLineLayer * other = (HyNavigationLineLayer*)layer;
self.offset = other.offset;
}
return self;
}
-(CABasicAnimation *)makeAnimationForKey:(NSString *)key
{
// TODO
return nil;
}
- (id<CAAction>)actionForKey:(NSString *)event
{
if ([event isEqualToString:#"offset"]) {
return [self makeAnimationForKey:event];
}
return [super actionForKey:event];
}
+ (BOOL)needsDisplayForKey:(NSString *)key
{
if ([key isEqualToString:#"offset"]) {
return YES;
}
return [super needsDisplayForKey:key];
}
- (void)drawInContext:(CGContextRef)ctx
{
NSLog(#"Never gets called");
}
#end
I believe this is the only relevant method on my view:
#implementation HyNavigationLineView
+ (Class)layerClass
{
return [HyNavigationLineLayer class];
}
#end
And, finally, in my view controller:
- (void)viewDidLoad
{
[super viewDidLoad];
// Instantiate the navigation line view
CGRect navLineFrame = CGRectMake(0.0f, 120.0f, self.view.frame.size.width, 15.0f);
self.navigationLineView = [[HyNavigationLineView alloc] initWithFrame:navLineFrame];
// Make it's background transparent
self.navigationLineView.backgroundColor = [UIColor colorWithWhite:0.0f alpha:0.0f];
self.navigationLineView.opaque = NO;
[[self.navigationLineView layer] addSublayer:[[HyNavigationLineLayer alloc] init]];
[self.view addSubview:self.navigationLineView];
}
The thing is that the drawInContext method is not called at all, although layerClass is. Am I missing something to make the layer draw?
Solved it. Need to call setNeedsDisplay
- (void)viewDidLoad
{
[super viewDidLoad];
// Instantiate the navigation line view
CGRect navLineFrame = CGRectMake(0.0f, 120.0f, self.view.frame.size.width, 15.0f);
self.navigationLineView = [[HyNavigationLineView alloc] initWithFrame:navLineFrame];
// Make it's background transparent
self.navigationLineView.backgroundColor = [UIColor colorWithWhite:0.0f alpha:0.0f];
self.navigationLineView.opaque = NO;
[[self.navigationLineView layer] addSublayer:[[HyNavigationLineLayer alloc] init]];
[self.view addSubview:self.navigationLineView];
[self.navigationLineView.layer setNeedsDisplay];
}

getting into the loop when doing progress view, ios

I am creating progress view by using CALayer by following
Header class
#import <UIKit/UIKit.h>
#import <QuartzCore/QuartzCore.h>
#interface ProgressBar : UIView
#property (strong, nonatomic) CALayer *subLayer;
#property (nonatomic) CGFloat progress;
#end
Implementation class
#implementation ProgressBar
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
self.progress = 0;
self.backgroundColor = [UIColor whiteColor];
self.subLayer = [CALayer layer];
self.subLayer.frame = self.bounds;
self.subLayer.backgroundColor = [UIColor orangeColor].CGColor;
[self.layer addSublayer:self.subLayer];
}
return self;
}
- (void)setProgress:(CGFloat)value {
NSLog(#"what is going on here");
if (self.progress != value) {
self.progress = value;
[self setNeedsLayout];
}
}
- (void)layoutSubviews {
CGRect rect = [self.subLayer frame];
rect.size.width = CGRectGetWidth([self bounds]) * self.progress;
[self.subLayer setFrame:rect];
}
In my viewcontroller, I am doing
#implementation ViewController
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
self.pBar = [[ProgressBar alloc] initWithFrame:CGRectMake(0, 50, 320, 10)];
[self.view addSubview:self.pBar];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (IBAction)click:(id)sender {
[self.pBar setProgress:.8];
}
When (IBAction)click is fired, I am getting into the infinitive loop like the picture below
Does anyone know what I am getting into this loop. Please advice me on this issue. Thanks
The problem is that your setProgress: method calls the setProgress: method - recursion.
- (void)setProgress:(CGFloat)value {
NSLog(#"what is going on here");
if (self.progress != value) {
self.progress = value; // <-- This calls [self setProgress:value]
[self setNeedsLayout];
}
}
Change the bad line to:
_progress = value;
Setting the ivar directly is always required when you implement the setter method of a property.

UIImagePIckerController appears but the camera does not start

Yes, It might be a duplicate question of this. But since it didn't get an answer, I will be more specific on the case and code:
I have 3 involved UIViewControllers:
WelcomeView - the first one
TakePhotoViewController - the second one who is delegate of the OverlayviewController
OverlayViewController - custom view for the camera.
Scenario:
User enter WelcomeView and clicks on a button to be transfered with segue to TakeView.
UIImageViewController is being opened to take a photo.
The user clicks on cancel button - didCancelCamera method in TakePhotoViewController is being invoked and he returns to WelcomeView
The user leaves the app.
The user re-opens the app and perform step 1 again.
THE IMAGE PICKER IS NOT BEING OPENED. I COULD TAKE A PHOTO AND IT'S OK - BUT THE USER CAN'T SEE WHAT HE IS TAKING.
OverlayViewController.h
#interface OverlayViewController : BaseViewController<UIImagePickerControllerDelegate,UINavigationControllerDelegate>
#property (nonatomic,weak) id<OverlayViewControllerDelegate> delegate;
#property (nonatomic,retain) UIImagePickerController *imagePickerController;
#end
OverlayViewController.m:
- (id)initWithCoder:(NSCoder *)aDecoder
{
self = [super initWithCoder:aDecoder];
if (self) {
self.imagePickerController = [[UIImagePickerController alloc] init];
self.imagePickerController.delegate = self;
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
self.view.backgroundColor = [UIColor clearColor];
}
- (IBAction)takePicture:(id)sender {
[self.imagePickerController takePicture];
}
- (IBAction)cancelImagePicker:(id)sender {
[self.delegate didCancelCamera];
}
- (void) setupImagePicker:(UIImagePickerControllerSourceType) sourceType
{
self.imagePickerController.sourceType = sourceType;
if (sourceType == UIImagePickerControllerSourceTypeCamera)
{
self.imagePickerController.showsCameraControls = NO;
if ([[self.imagePickerController.cameraOverlayView subviews] count] ==0)
{
CGRect overlayViewFrame = self.imagePickerController.cameraOverlayView.frame;
CGRect newFrame = CGRectMake(0.0, CGRectGetHeight(overlayViewFrame)-self.view.frame.size.height-10.0, CGRectGetWidth(overlayViewFrame), self.view.frame.size.height + 10.0);
self.view.frame = newFrame;
[self.imagePickerController.cameraOverlayView addSubview:self.view];
}
}
}
- (void)finishAndUpdate
{
[NSThread detachNewThreadSelector:#selector(threadStartAnimating:) toTarget:self withObject:nil];
[self.delegate didFinishWithCamera]; // tell our delegate we are done with the camera
}
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
[self finishAndUpdate];
}
TakePhotoViewController.h
#interface TakePhotoViewController : BaseViewController<UIImagePickerControllerDelegate,UINavigationControllerDelegate,OverlayViewControllerDelegate>
#property (nonatomic, retain) OverlayViewController *overlayViewController;
#end
TakePhotoViewController.m
- (void)viewDidLoad
{
[super viewDidLoad];
UIStoryboard *sb = [UIStoryboard storyboardWithName:#"MainStoryboard" bundle:nil];
// Insert the overlay
self.overlayViewController = (OverlayViewController *)[sb instantiateViewControllerWithIdentifier:#"Overlay"];
self.overlayViewController.delegate = self;
}
- (void)viewDidUnload
{
self.overlayViewController = nil;
[super viewDidUnload];
// Release any retained subviews of the main view.
}
- (void)openImagePicker {
if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]){
[self showImagePicker:UIImagePickerControllerSourceTypeCamera];
}
else{
[self showImagePicker:UIImagePickerControllerSourceTypePhotoLibrary];
}
}
- (void)viewDidAppear:(BOOL)animated{
if (appDelegate.shouldOpenPicker){
[self openImagePicker];
}
}
- (void)showImagePicker:(UIImagePickerControllerSourceType)sourceType
{
if ([UIImagePickerController isSourceTypeAvailable:sourceType])
{
[self.overlayViewController setupImagePicker:sourceType];
[self presentViewController:self.overlayViewController.imagePickerController animated:YES completion:nil];
}
}
-(void)didCancelCamera{
[[self.overlayViewController.imagePickerController presentingViewController] dismissViewControllerAnimated:NO completion:^ {
[self performSegueWithIdentifier:#"fromTakeToWelcome" sender:self];
}];
}
I found the bug.
The method
-(void)didCancelCamera from TakePhotoViewController is being called when the user clicks on - (IBAction)cancelImagePicker:(id)sender in OverlayViewController.
However, somehow the code in didCancelCamera causes viewDidAppear method of TakePhotoViewController to be invoked again and reopen the image picker.
I have no idea why
[[self.overlayViewController.imagePickerController presentingViewController] dismissViewControllerAnimated:NO completion:^ {
[self performSegueWithIdentifier:#"fromTakeToWelcome" sender:self];
}];
causes the viewDidAppear method of that view (TakePhoto) being recalled again.
Hope that it will help someone

Cocoa Idiomatic First Responder and Keyboard Event Handling Design

I've been reading the Cocoa Event Handling Guide to understand how to handle keyboard events for my application. However, I'm not quite sure if the solution I've found is the idiomatic way to approach this problem or even the best.
I have a view called CustomView and controller called CustomViewController that contains a NSTextView (within a NSScrollView) and a NSTextField. Basically a chat window.
What I would like is that even if the NSTextField is not selected, and the user starts typing, the NSTextField should be made the first responder and the text the user types should be appended to the NSTextField.
I've come up with a solution (below) where my RootWindowController captures keyDown events, makes the NSTextField the first responder, gets the field editor, and appends the text.
Is this the idiomatic approach Cocoa developers take or is their a simpler way that I am missing? Code is below. Thanks.
RootWindowController.m
#import "RootWindowController.h"
#implementation RootWindowController
- (id)initWithWindow:(NSWindow *)window
{
self = [super initWithWindow:window];
if (self) {
self.customViewController = [[CustomViewController alloc] init];
NSView *contentView = self.window.contentView;
CGFloat viewWidth = contentView.frame.size.width;
CGFloat viewHeight = contentView.frame.size.height;
self.customViewController.customView.textField.frame =
NSMakeRect(0, 0, viewWidth, 50);
self.customViewController.customView.scrollView.frame =
NSMakeRect(0, 51, viewWidth, viewHeight - 50);
self.customViewController.customView.textView.frame =
NSMakeRect(0, 51, viewWidth, viewHeight - 50);
self.window.contentView = self.customViewController.customView;
}
return self;
}
- (void)keyDown:(NSEvent *)theEvent
{
[self.window
makeFirstResponder:self.customViewController.customView.textField];
NSString *characters = theEvent.characters;
NSText *fieldEditor = [self.window fieldEditor:YES
forObject:self.customViewController.customView.textField];
[fieldEditor setString:
[NSString stringWithFormat:#"%#%#", fieldEditor.string, characters]];
[fieldEditor setSelectedRange:NSMakeRange(fieldEditor.string.length, 0)];
[fieldEditor setNeedsDisplay:YES];
}
#end
CustomViewController.m
#import "CustomViewController.h"
#implementation CustomViewController
- (id)init
{
self = [super init];
if (self) {
self.customView = [[CustomView alloc] initWithFrame:NSZeroRect];
[self.customView setAutoresizesSubviews:YES];
self.view = self.customView;
}
return self;
}
#end
CustomView.m
#import "CustomView.h"
#implementation CustomView
- (id)initWithFrame:(NSRect)frame
{
self = [super initWithFrame:frame];
if (self) {
self.scrollView = [[NSScrollView alloc] initWithFrame:NSZeroRect];
self.textView = [[NSTextView alloc] initWithFrame:NSZeroRect];
self.textField = [[NSTextField alloc] initWithFrame:NSZeroRect];
[self.textView setAutoresizesSubviews:YES];
[self.scrollView setDocumentView:self.textView];
[self.scrollView setHasVerticalScroller:YES];
[self.scrollView setAutoresizesSubviews:YES];
[self.textField setStringValue:#"Placeholder Text"];
[self addSubview:self.scrollView];
[self addSubview:self.textField];
[self.textView setNeedsDisplay:YES];
}
return self;
}
- (BOOL)acceptsFirstResponder
{
return YES;
}
#end

Subclass of UIView. How to add through Interface Builder?

I have a subclass of UITextField and want to be able to add it to the view in IB. What I did is added UITextField and changed its class to my subclass in Identity tab of Inspector. But I can only see UITextField on the view.
Code:
#interface ExtendedTextField : UITextField {
}
//implementation
#implementation ExtendedTextField
- (void)baseInit
{
UIImage * curImage = [UIImage imageNamed:#"tfbg.png"];
[self baseInitWithImage : curImage];
}
- (void)baseInitWithImage : (UIImage *) aImage
{
aImage = [aImage stretchableImageWithLeftCapWidth:29 topCapHeight:29];
self.background = aImage;
self.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;
UIView * curLeftView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 10, self.frame.size.height)];
self.leftView = curLeftView;
self.rightView = curLeftView;
[curLeftView release];
self.leftViewMode = UITextFieldViewModeAlways;
self.rightViewMode = UITextFieldViewModeAlways;
[self setTextColor:[UIColor greenColor]];
}
- (void)awakeFromNib
{
[super awakeFromNib];
[self baseInit];
}
/*
- (id)initWithCoder:(NSCoder *)aDecoder
{
self = [super initWithCoder:aDecoder];
if (self) {
[self baseInit];
}
return self;
}
*/
- (id)initWithFrame:(CGRect)frame {
self = [super initWithFrame:frame];
if (self)
{
[self baseInit];
}
return self;
}
- (id)initWithFrame:(CGRect)frame withImage:(UIImage*)aImage
{
self = [super initWithFrame:frame];
if (self) {
[self baseInitWithImage : aImage];
}
return self;
}
- (void)dealloc {
[super dealloc];
}
#end
EDIT: I noticed several things:
-- if I put [super initWithFrame:...] instead of [super initWithCoder:...] inside
(id)initWithCoder:(NSCoder *)aDecoder
it works well.
-- Now I am using awakefromnib instead of initwithcoder and the only thing that get changed in textfield is textColor.
Could someone explain why so?
Solution I needed to set border style to none. BS overlayed bg image.
While showing your .xib in Xcode, reveal the right pane, select your view and in the third tab, change Classto whatever you want it to be.