I have two text views beside each other with multiple lines of text.
How can I make them both scroll together based on scrolling either one of them at the same time?
First
#interface ViewController : UIViewController <UITextViewDelegate>
second make both textViews delagates
tv1.delegate = self
tv2.delegate = self
Implement
-(void)scrollViewDidScroll:(UIScrollView *)inScrollView {
self.tv1.contentOffset = inScrollView.contentOffset;
self.tv2.contentOffset = inScrollView.contentOffset;
}
Here is a demo txView
Edit
.h
#import <UIKit/UIKit.h>
#interface ViewController : UIViewController <UITextViewDelegate>
#property (weak, nonatomic) IBOutlet UITextView *tv1;
#property (weak, nonatomic) IBOutlet UITextView *tv2;
#end
.m
#import "ViewController.h"
#interface ViewController ()
#end
#implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
self.tv1.delegate = self;
self.tv2.delegate = self;
}
- (void)scrollViewDidScroll:(UIScrollView *)inScrollView {
self.tv1.contentOffset = inScrollView.contentOffset;
self.tv2.contentOffset = inScrollView.contentOffset;
}
Related
I have created a custom UIView (ProgressView) where I draw a shape imported via StyleKit from PaintCode.
Below are the codes. I have declared instance variable property in my custom UIView and when I try to change property from ViewController, It does not work.
ProgressView.h
#import <UIKit/UIKit.h>
#interface ProogressView : UIView
#property (nonatomic) float daysFraction;
#property (nonatomic) float pagesFraction;
#end
ProgressView.m
#import "ProgressView.h"
#import "StyleKitName.h"
#import "ViewController.h"
#implementation ProgressView
#synthesize daysFraction = _daysFraction;
#synthesize pagesFraction = _pagesFraction;
- (void)drawRect:(CGRect)rect {
// Drawing code
[StyleKitName drawCanvas1WithDaysFraction:self.daysFraction pageFraction:self.pagesFraction];
}
-(void)awakeFromNib {
[super awakeFromNib];
self.pagesFraction = 0;
self.daysFraction = 0;
}
ViewController.h
#import <UIKit/UIKit.h>
#interface ViewController : UIViewController
#end
*ViewController.m**
#import "ViewController.h"
#import "ButtonAnimation.h"
#import "ProgressView.h"
#import "StyleKitName.h"
#interface ViewController ()
#property (weak, nonatomic) IBOutlet ButtonAnimation *buttonView;
#property (weak, nonatomic) IBOutlet UIButton *actionButton;
#end
#implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
ProgressView *new =[[ ProgressView alloc]init];
new.daysFraction = 0.7f; // here I am setting value to variable in custom view ProgressView but not working.
}
- (IBAction)animateTheButton:(id)sender {
self.buttonView.layer.backgroundColor = [UIColor clearColor].CGColor;
[self.buttonView addErrorAnimation];
}
#end
You need to add this view to UIViewController's view:
[self.view addSubview:progressView];
Later, you must also set a frame. Eg
[progressView setFrame:self.view.bounds];
You may do it in viewDid/WillLayoutSubviews method to change it on rotation / window resize event.
BTW, do not name your view as new, it's horrible. Such name doesn't even tell what kind of variable is it.
I'm currently developing an app that has three buttons at the bottom of the layout (for customization reasons I couldn't use TabBar Controller or Segmented Control).
When I click one of these buttons, a new view should show up and inherite the buttons bar, along with its state (buttons can be in selected or unselected state).
I'm completely new to iOS development, so I tried following this guide (http://www.thinkandbuild.it/working-with-custom-container-view-controllers/), but problem is when I click a button, child view doesn't show up.
ContainerViewController.h
#interface ContainerViewController : UIViewController
#property (weak, nonatomic) IBOutlet UIButton *firstButton;
#property (weak, nonatomic) IBOutlet UIButton *secondButton;
#property (weak, nonatomic) IBOutlet UIButton *thirdButton;
#property (weak, nonatomic) IBOutlet UIView *detailView;
- (IBAction)click:(id)sender;
#end
ContainerViewController.m
#import "ContainerViewController.h"
#import "FirstViewController.h"
#interface ContainerViewController ()
#property UIContainerViewController *currentDetailContainerViewController;
#end
#implementation ContainerViewController
#synthesize firstButton, secondButton, thirdButton;
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (IBAction)click:(id)sender
{
// switch buttons state
// ...
[self addDetailController:sender];
}
- (void)presentDetailController:(UIContainerViewController*)detailVC{
//0. Remove the current Detail View Controller showed
if(self.currentDetailContainerViewController){
[self removeCurrentDetailContainerViewController];
}
//1. Add the detail controller as child of the container
[self addChildContainerViewController:detailVC];
//2. Define the detail controller's view size
detailVC.view.frame = [self frameForDetailController];
//3. Add the Detail controller's view to the Container's detail view and save a reference to the detail View Controller
[self.detailView addSubview:detailVC.view];
self.currentDetailContainerViewController = detailVC;
//4. Complete the add flow calling the function didMoveToParentContainerViewController
[detailVC didMoveToParentContainerViewController:self];
}
- (void)removeCurrentDetailContainerViewController{
//1. Call the willMoveToParentContainerViewController with nil
// This is the last method where your detailContainerViewController can perform some operations before neing removed
[self.currentDetailContainerViewController willMoveToParentContainerViewController:nil];
//2. Remove the DetailContainerViewController's view from the Container
[self.currentDetailContainerViewController.view removeFromSuperview];
//3. Update the hierarchy"
// Automatically the method didMoveToParentContainerViewController: will be called on the detailContainerViewController)
[self.currentDetailContainerViewController removeFromParentContainerViewController];
}
- (CGRect)frameForDetailController{
CGRect detailFrame = self.detailView.bounds;
return detailFrame;
}
- (void)addDetailController:(id)sender {
FirstViewController *detailVC = [[FirstViewController alloc]initWithString:#"First view"];
[self presentDetailController:detailVC];
}
#end
FirstViewController.h
#import <UIKit/UIKit.h>
#class ContainerViewController;
#interface FirstViewController : UIViewController
#property (weak, nonatomic) IBOutlet UILabel *label;
- (id)initWithString:(NSString*)string;
#end
FirstViewController.m
#import "FirstViewController.h"
#interface FirstViewController (){
NSString *text;
}
#end
#implementation FirstViewController
- (id)initWithString:(NSString*)string {
self = [super init];
if(self){
text = string;
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
self.label.text = text;
}
#end
In my iOS application, I have a main View Controller with three buttons, which work like a tab bar: when I click one of the buttons, a new view controller is invoked.
I tried to implement this via container view containers, so I tried following this guide (http://www.thinkandbuild.it/working-with-custom-container-view-controllers/) and invoke the presentDetailController method in the viewDidLoad of the main controller.
Actually, no views are showed: someone can help me figuring out why? Thanks.
ViewController.h
#import <UIKit/UIKit.h>
#interface ViewController : UIViewController
#property (weak, nonatomic) IBOutlet UIButton *btnOne;
#property (weak, nonatomic) IBOutlet UIButton *btnTwo;
#property (weak, nonatomic) IBOutlet UIButton *btnThree;
#property (weak, nonatomic) IBOutlet UIView *detailView;
- (IBAction)click:(id)sender;
#end
ViewController.m
#import "ViewController.h"
#import "FirstViewController.h"
#interface ViewController ()
#property UIViewController *currentDetailViewController;
#end
#implementation ViewController
#synthesize btnOne, btnTwo, btnThree;
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
FirstViewController *fvc = [[FirstViewController alloc]initWithString:#"I'm the first Controller!"];
[self presentDetailController:fvc];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (IBAction)click:(id)sender
{
// button selection stuff
[self addDetailController:sender];
}
- (void)presentDetailController:(UIViewController*)detailVC{
//0. Remove the current Detail View Controller showed
if(self.currentDetailViewController){
[self removeCurrentDetailViewController];
}
//1. Add the detail controller as child of the container
[self addChildViewController:detailVC];
//2. Define the detail controller's view size
detailVC.view.frame = [self frameForDetailController];
//3. Add the Detail controller's view to the Container's detail view and save a reference to the detail View Controller
[self.detailView addSubview:detailVC.view];
self.currentDetailViewController = detailVC;
//4. Complete the add flow calling the function didMoveToParentViewController
[detailVC didMoveToParentViewController:self];
}
- (void)removeCurrentDetailViewController{
//1. Call the willMoveToParentViewController with nil
// This is the last method where your detailViewController can perform some operations before neing removed
[self.currentDetailViewController willMoveToParentViewController:nil];
//2. Remove the DetailViewController's view from the Container
[self.currentDetailViewController.view removeFromSuperview];
//3. Update the hierarchy"
// Automatically the method didMoveToParentViewController: will be called on the detailViewController)
[self.currentDetailViewController removeFromParentViewController];
}
- (CGRect)frameForDetailController{
// newFrame's height should be currentFrame's height minus buttons' height
CGRect detailFrame = CGRectMake(0, 0, self.detailView.bounds.size.width, self.detailView.bounds.size.height-self.btnOne.frame.size.height);
return detailFrame;
}
- (void)addDetailController:(id)sender {
FirstViewController *detailVC = [[FirstViewController alloc]initWithString:#"First button clicked"];
[self presentDetailController:detailVC];
}
#end
FirstViewController.h
#import <UIKit/UIKit.h>
#class ViewController;
#interface FirstViewController : UIViewController
#property (weak, nonatomic) IBOutlet UILabel *label;
#property (weak, nonatomic) IBOutlet UIButton *btnOne;
#property (weak, nonatomic) IBOutlet UIButton *btnTwo;
#property (weak, nonatomic) IBOutlet UIButton *btnThree;
- (id)initWithString:(NSString*)string;
#end
FirstViewController.m
#import "FirstViewController.h"
#interface FirstViewController (){
NSString *text;
}
#end
#implementation FirstViewController
- (id)initWithString:(NSString*)string {
self = [super init];
if(self){
text = string;
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
self.label.text = text;
}
#end
As part of creating FirstViewController, you are calling [super init] which produces a bare UIViewController. From your diagram, it seems as if you want to load a FirstViewController from your storyboard instead.
I suggest a sequence where you create your controller using instantiateViewControllerWithIdentifier:, then set a string property in the controller that you want to use as the label, and finally assign the string to the label when the controller's view loads.
Writing my first iphone app through this tutorial--I have a custom UIView with the method showDie and I have two UIView elements on my storyboard that I've hooked up to my ViewController. However, both the UIView elements have the error message "No visible #interface for 'UIView' declares the selector 'showDie'. I think that's because the UIViews aren't subclassing XYZDieView, but when I control-clicked from my Storyboard, only UIView appeared in the dropdown--no XYZDieView. I tried just changing the text manually in the ViewController.h, but that didn't work (I didn't think it would). Am I on the right track? How do I use my subclass? (xcode 5)
XYZDieView.m
-(void)showDie:(int)num
{
if (self.dieImage == nil){
self.dieImage = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 90, 90)];
[self addSubview:self.dieImage];
}
NSString *fileName = [NSString stringWithFormat:#"dice%d.png", num];
self.dieImage.image = [UIImage imageNamed:fileName];
}
XYZViewController.h
#import <UIKit/UIKit.h>
#import "XYZDieView.h"
#interface XYZViewController : UIViewController
#property (weak, nonatomic) IBOutlet UILabel *sumLabel;
#property (strong, nonatomic) IBOutlet UIButton *rollButton;
#property (strong, nonatomic) IBOutlet UIView *leftDieView;
#property (strong, nonatomic) IBOutlet UIView *rightDieView;
#end
XYZViewController.m
#import "XYZViewController.h"
#import "XYZDiceDataController.h"
#interface XYZViewController ()
#end
#implementation XYZViewController
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (IBAction)rollButtonClicked:(UIButton *)sender {
XYZDiceDataController *diceDataController = [[XYZDiceDataController alloc] init];
int roll = [diceDataController getDiceRoll];
int roll2 = [diceDataController getDiceRoll];
[self.leftDieView showDie:roll];
[self.rightDieView showDie:roll2];
int sum = roll + roll2;
NSString *sumText = [NSString stringWithFormat:#"Sum is %i", sum];
self.sumLabel.text = sumText;
}
#end
Yes you're right, the problem is subclassing. In order to have a view conform to a subclass in the interface builder you need to
Click on the UIView in your storyboard
Open the right inspector panel
Click on the third tab for identity inspector
Add your class
Then try to connect it to your ViewController again.
Edit: Afterwards you may need to cast XYZDieView myView = (XYZDieView*)leftDieView;
I have a big noob problem. I new in iOS and I'm trying to do this:
I have two ViewControllers. The first one has an button that if it is pushed, control goes to a second view controller.
That works but the problem is when I try to get data in my second view controller. The UITextfield doesn't work.
I'm trying to display which I insert into textfield in the label. But THE TEXTFIELD DOESN'T WORK :(
I putted the IBOutlets succesfully in the xibs and connect the buttons with their IBActions...
This is my code:
ViewController.h
#import <UIKit/UIKit.h>
#import "SecondViewController.h"
#class SecondViewController;
#interface ViewController : UIViewController
#property (strong, nonatomic) SecondViewController *secondViewController;
-(IBAction)buttonClicked:(id)sender;
#end
ViewController.m
#import "ViewController.h"
#implementation ViewController
#synthesize secondViewController;
-(IBAction)buttonClicked:(id)sender {
self.secondViewController = [[SecondViewController alloc]initWithNibName:#"SecondViewController" bundle:nil];
[self presentViewController:self.secondViewController animated:YES completion:nil];
}
SecondViewController.h
#import <UIKit/UIKit.h>
#interface SecondViewController : UIViewController {
IBOutlet UITextField *textField;
UIButton *obtener;
IBOutlet UILabel *label;
}
#property (nonatomic, retain) IBOutlet UITextField *textField;
#property (nonatomic, retain) IBOutlet UIButton *obtener;
#property (nonatomic, retain) IBOutlet UILabel *label;
-(IBAction)obtenerClicked:(id)sender;
#end
SecondViewController.m
#import "SecondViewController.h"
#implementation SecondViewController
#synthesize obtener, textField, label;
-(IBAction)obtenerClicked:(id)sender {
label.text = textField.text;
}
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (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.
}
#pragma mark - View lifecycle
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
// Return YES for supported orientations
return YES;
}
#end
In your SecondViewController.h, add this property:
#property(nonatomic, readwrite) NSString* myString;
now in firstViewController's onClick method, add this line
-(IBAction)buttonClicked:(id)sender {
//....... Previous code....
self.secondViewController.myString= #"String to be sent";
}
This will pass the string for you..
if you want to pass the string in text field, use this:
-(IBAction)buttonClicked:(id)sender {
//....... Previous code....
self.secondViewController.textField.text= #"String to be sent";
}
hope it will work fine for your requirement.
UPDATE:
Do the following to get expected results:
1. make your secondViewController a textView delegate.
in your secondViewController.h
replace #interface SecondViewController : UIViewController with #interface SecondViewController : UIViewController<UITextFieldDelegate>
put a button in your secondViewController & create an IBAction for it.
on Click event of button, write this:
self.label.text= self.textfield.text;
tell me if it does not work.