TapGestureRecognizer does not get called - iphone

Hi in the main WiewController in the viewDidLoad i set up a
UIGestureRecognizer *recognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(processTap)];
and then i a for loop i create UIViews and add them to a scroll view, that is then added to the main view.
UIView *newsContainer = [[UIView alloc] initWithFrame:CGRectMake(160 * countnews, 30, 156, 126)];
newsContainer.tag = countnews;
newsContainer.userInteractionEnabled = YES;
[newsContainer addGestureRecognizer:recognizer];
[tempScroll addSubview:newsContainer];
then i have a function
- (void)processTap:(UITapGestureRecognizer *)recognizer {
UIView *view = recognizer.view;
NSLog(#"HELLO, %d", view.tag);
}
Which never gets called, any suggestions? your help would be greatly appreciated. Thanks in advance.
here is the entire .m
#import "iPadMainViewController.h"
#import "GradeintView.h"
#import <QuartzCore/CALayer.h>
#import "Category.h"
#import "News.h"
#import "LazyImageView.h"
#import "TouchView.h"
#interface iPadMainViewController ()
#end
#implementation iPadMainViewController
#synthesize detailsView = _detailsView;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
UIGestureRecognizer *recognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(processTap:)];
[recognizer setDelegate:self];
GradeintView *MainTitle = [[GradeintView alloc] initWithFrame:CGRectMake(0, 0, 1024, 50)];
GradeintView *MainSubTitle = [[GradeintView alloc] initWithFrame:CGRectMake(0, 50, 1024, 30)];
NSMutableArray *categoriesCollection = [[Category alloc] allCategoriesFromFeedAtUrl:#"http://geonews.ge/xml/category.php"];
UIScrollView *categories = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, 512, 768)];
_detailsView = [[UIWebView alloc] initWithFrame:CGRectMake(500, 0, 512, 768)];
[_detailsView addGestureRecognizer:recognizer];
[categories setScrollEnabled:TRUE];
[categories setContentSize:CGSizeMake(500, categoriesCollection.count * 156)];
MainTitle.layer.masksToBounds = NO;
MainTitle.layer.shadowOffset = CGSizeMake(3, 3);
MainTitle.layer.shadowRadius = 5;
MainTitle.layer.shadowOpacity = 0.3;
[categories setBackgroundColor:[UIColor redColor]];
int counter = 0;
for (Category *cat in categoriesCollection)
{
UIView *categoryTitle = [[UIView alloc] initWithFrame:CGRectMake(0, 166 * counter
, 500, 20)];
UILabel *categoryLabel = [[UILabel alloc] initWithFrame:CGRectMake(15, 0, 200, 20)];
[categoryLabel setBackgroundColor:[UIColor clearColor]];
NSMutableArray *allCurrentNews = [[News alloc] allNewsFromCategory:cat.CategoryId];
categoryLabel.text = cat.Name;
categoryLabel.textColor = [UIColor whiteColor];
[categoryTitle addSubview:categoryLabel];
UIColor *myblack = [[UIColor alloc] initWithRed:0.14 green:0.14 blue:0.14 alpha:1];
UIColor *ligheterBlac = [[UIColor alloc] initWithRed:0.227 green:0.22 blue:0.22 alpha:1];
[categoryTitle setBackgroundColor:myblack];
UIScrollView *tempScroll = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 166 * counter, 500, 166)];
UIColor *tempcolor = ligheterBlac;
tempScroll.layer.borderColor = [UIColor colorWithRed:0.34 green:0.34 blue:0.34 alpha:1].CGColor;
tempScroll.layer.borderWidth = 0.5f;
int countnews = 0;
for (News *news in allCurrentNews)
{
UIView *newsContainer = [[UIView alloc] initWithFrame:CGRectMake(160 * countnews, 30, 156, 126)];
newsContainer.tag = countnews;
[newsContainer addGestureRecognizer:recognizer];
//newsContainer.NewsId = news.NewsId;
LazyImageView *image = [[LazyImageView alloc] initWithURl:[NSURL URLWithString:news.Thumbnail]];
image.frame = CGRectMake(0, 0 , 156, 96);
UILabel *newsTitle = [[UILabel alloc] initWithFrame:CGRectMake(0, 96, 156, 30)];
newsTitle.backgroundColor = myblack;
newsTitle.numberOfLines = 2;
newsTitle.font = [UIFont systemFontOfSize:11];
newsTitle.text = news.Title;
newsTitle.textColor = [UIColor whiteColor];
newsTitle.textAlignment = UITextAlignmentCenter;
newsContainer.layer.borderColor = [UIColor colorWithRed:0.34 green:0.34 blue:0.34 alpha:1].CGColor;
newsContainer.layer.borderWidth = 0.5f;
[newsContainer addSubview:image];
[newsContainer addSubview:newsTitle];
countnews ++;
[tempScroll setContentSize:CGSizeMake(allCurrentNews.count * 156, 96)];
[tempScroll addSubview:newsContainer];
//[image release];
}
[tempScroll setBackgroundColor: tempcolor];
[categories addSubview:tempScroll];
[categories addSubview:categoryTitle];
[tempcolor release];
[tempScroll release];
counter ++;
}
self.detailsView.layer.masksToBounds = NO;
self.detailsView.layer.shadowOffset = CGSizeMake(-10, 5);
self.detailsView.layer.shadowRadius = 5;
self.detailsView.layer.shadowOpacity = 0.3;
[self.detailsView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:#"http://www.amazon.com"]]];
[self.view addSubview:categories];
[self.view addSubview:self.detailsView];
[self.view addSubview:MainSubTitle];
[self.view addSubview:MainTitle];
}
- (void)processTap:(UITapGestureRecognizer *)recognizer {
UIView *view = recognizer.view;
NSLog(#"HELLO, %d", view.tag);
}
- (void)viewDidUnload
{
[super viewDidUnload];
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return YES;
}
- (void)dealloc {
[super dealloc];
}
- (void)loadDetailedContent:(NSString *)s
{
}
#end

Change
initWithTarget:self.view
to
initWithTarget:self
EDIT:
You also have forgotten colon:
initWithTarget:self action:#selector(processTap:)
EDIT2:
You have created _detailsView (with assigned UITapGestureRecognizer) but have not added it to any subview. How it will work?

I think the problem is that the scrollView, which contains your views, has its own internal gesture recognizer that is "taking away" touch events from your tap gesture recognizer. Try implementing the following gesture recognizer delegate method:
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
return YES;
}

Have you checked the Interaction setting?
Interaction shall be set to "User Interaction Enabled" in the Attributes inspector for the image.

Change #selector(processTap) to #selector(processTap:)
Because now you calling method that doesn't exist.

try this code
UITapGestureRecognizer *gestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(processTap)];
[newsContainer addGestureRecognizer::gestureRecognizer];
gestureRecognizer.cancelsTouchesInView = NO;

I assume the problem is, you might have missed to add <UIGestureRecognizerDelegate> in the header file.

You're adding a UIGestureRecognizer to a UIWebview, which is not recommended. UIWebview has its ownUIGestureRecognizer`s which are tricky to over-ride. See this SO question for more info.

you can first add your gestureRecognizer to self.view and check your method called or not... as well check this thread
Issue with a UITapGestureRecognizer

Related

UITapGestureRecognizer not working when added for UIView Cannot detect the issue

UITapGestureRecognizer not working when added for UIView. Cannot detect the issue.
Note: I am not using it in ViewDidLoad. Please help me is solving the problem. Thanks in Advance.
-(void)setSegmentValues:(NSArray *) values
{
UITapGestureRecognizer *tap1 = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(tapDetected:)];
tap1.numberOfTapsRequired = 1;
tap1.delegate=self;
[val1 addGestureRecognizer:tap1];
val1 = [[UIView alloc]initWithFrame:CGRectMake(40, 200, 70, 40)];
val1.backgroundColor = [UIColor magentaColor];
label1 = [[UILabel alloc]initWithFrame:CGRectMake(0, 0,70, 40)];
label1.backgroundColor = [UIColor yellowColor];
label1.text = [values objectAtIndex:0];
label1.textAlignment = UITextAlignmentCenter;
val1.userInteractionEnabled=YES;
[val1 addGestureRecognizer:tap1];
[val1 addSubview:label1];
[self addSubview:val1];
}
Other stuffs:
- (void)tapDetected:(UITapGestureRecognizer *)tapRecognizer
{
NSLog(#"success1");
}
-(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch
{
return YES;
}
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
return YES;
}
Note: I've also added UIGestureRecognizerDelegate.
Just do like this.. You will get correct solution..
-(void)setSegmentValues:(NSArray *)values bgColor:(UIColor *)color
{
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:#selector(selectedIndexValue:)];
tap.numberOfTapsRequired = 1;
tap.numberOfTouchesRequired = 1;
viewOne = [[UIView alloc]initWithFrame:CGRectMake(40, 50, 80, 60)];
viewOne.backgroundColor = color;
viewOne.tag = 0;
UILabel *lblOne = [[UILabel alloc]initWithFrame:CGRectMake(0, 0, 80, 60)];
lblOne.text = [values objectAtIndex:0];
lblOne.textAlignment = UITextAlignmentCenter;
lblOne.backgroundColor = [UIColor clearColor];
[viewOne addSubview:lblOne];
viewOne.userInteractionEnabled = YES;
[viewOne addGestureRecognizer:tap];
[self addSubview:viewOne];
}
-(void)selectedIndexValue:(UIGestureRecognizer *)gesture
{
int myViewTag = gesture.view.tag;
if (myViewTag == 0)
{
selectedIndex1 = 0;
self.lblValue.text = [valueArray objectAtIndex:myViewTag];
viewOne.backgroundColor = [UIColor colorWithRed:57.0f green:122.0f blue:255.0f alpha:1.0f];
viewTwo.backgroundColor = viewColor;
viewThree.backgroundColor = viewColor;
}
[self sendActionsForControlEvents:UIControlEventValueChanged];
}
Is you control even going in "setSegmentValues:" method?
Make sure your method is being called from viewDidLoad or viewWillAppear or any IBAction.
this is error:
[val1 addGestureRecognizer:tap1];
val1 = [[UIView alloc]initWithFrame:CGRectMake(40, 200, 70, 40)];
write:
val1 = [[UIView alloc]initWithFrame:CGRectMake(40, 200, 70, 40)];
[val1 addGestureRecognizer:tap1];
You added a gesture to an UiView without alloc init.
Initialize the View before adding Gesture to it
Please use this code
-(void)setSegmentValues:(NSArray *) values
{
val1 = [[UIView alloc]initWithFrame:CGRectMake(40, 200, 70, 40)];
UITapGestureRecognizer *tap1 = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(tapDetected:)];
tap1.numberOfTapsRequired = 1;
tap1.delegate=self;
[val1 addGestureRecognizer:tap1];
val1.backgroundColor = [UIColor magentaColor];
label1 = [[UILabel alloc]initWithFrame:CGRectMake(0, 0,70, 40)];
label1.backgroundColor = [UIColor yellowColor];
label1.text = [values objectAtIndex:0];
label1.textAlignment = UITextAlignmentCenter;
val1.userInteractionEnabled=YES;
[val1 addGestureRecognizer:tap1];
[val1 addSubview:label1];
[self addSubview:val1]
}

How to load content into a WebView by touching a UIView

I Have a collection of views in a view controller. by touching one of those views I would like to load specific data, for ex. a webpage into a web view that is on the same view controller
How would you accomplish that?
Thank you in advance
Here is my code with does not want to work:
UIView *categoryTitle = [[UIView alloc] initWithFrame:CGRectMake(0, 166 * counter
, 500, 20)];
UILabel *categoryLabel = [[UILabel alloc] initWithFrame:CGRectMake(15, 0, 200, 20)];
[categoryLabel setBackgroundColor:[UIColor clearColor]];
NSMutableArray *allCurrentNews = [[News alloc] allNewsFromCategory:cat.CategoryId];
categoryLabel.text = cat.Name;
categoryLabel.textColor = [UIColor whiteColor];
[categoryTitle addSubview:categoryLabel];
UIColor *myblack = [[UIColor alloc] initWithRed:0.14 green:0.14 blue:0.14 alpha:1];
UIColor *ligheterBlac = [[UIColor alloc] initWithRed:0.227 green:0.22 blue:0.22 alpha:1];
[categoryTitle setBackgroundColor:myblack];
UIScrollView *tempScroll = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 166 * counter, 500, 166)];
UIColor *tempcolor = ligheterBlac;
tempScroll.layer.borderColor = [UIColor colorWithRed:0.34 green:0.34 blue:0.34 alpha:1].CGColor;
tempScroll.layer.borderWidth = 0.5f;
int countnews = 0;
for (News *news in allCurrentNews)
{
UIView *newsContainer = [[UIView alloc] initWithFrame:CGRectMake(160 * countnews, 30, 156, 126)];
newsContainer.tag = countnews + 1;
[newsContainer addGestureRecognizer:recognizer];
//newsContainer.NewsId = news.NewsId;
LazyImageView *image = [[LazyImageView alloc] initWithURl:[NSURL URLWithString:news.Thumbnail]];
image.frame = CGRectMake(0, 0 , 156, 96);
UILabel *newsTitle = [[UILabel alloc] initWithFrame:CGRectMake(0, 96, 156, 30)];
newsTitle.backgroundColor = myblack;
newsTitle.numberOfLines = 2;
newsTitle.font = [UIFont systemFontOfSize:11];
newsTitle.text = news.Title;
newsTitle.textColor = [UIColor whiteColor];
newsTitle.textAlignment = UITextAlignmentCenter;
newsContainer.layer.borderColor = [UIColor colorWithRed:0.34 green:0.34 blue:0.34 alpha:1].CGColor;
newsContainer.layer.borderWidth = 0.5f;
[newsContainer addSubview:image];
[newsContainer addSubview:newsTitle];
countnews ++;
[tempScroll setContentSize:CGSizeMake(allCurrentNews.count * 156, 96)];
[tempScroll addSubview:newsContainer];
//[image release];
}
[tempScroll setBackgroundColor: tempcolor];
[categories addSubview:tempScroll];
[categories addSubview:categoryTitle];
[tempcolor release];
[tempScroll release];
counter ++;
}
self.detailsView.layer.masksToBounds = NO;
self.detailsView.layer.shadowOffset = CGSizeMake(-10, 5);
self.detailsView.layer.shadowRadius = 5;
self.detailsView.layer.shadowOpacity = 0.3;
[self.view addSubview:categories];
[self.view addSubview:_detailsView];
[self.view addSubview:MainSubTitle];
[self.view addSubview:MainTitle];
Use the UITapGestureRecognizer.
- (void)viewDidLoad {
[super viewDidLoad];
UITapGestureRecognizer *recognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:selector(processTap:)];
UIView *targetView = //assign the view you need
targetView.tag = 5;
[targetView addGestureRecognizer:recognizer];
}
- (void)processTap:(UITapGestureRecognizer *)recognizer {
UIView *view = recognizer.view;
if (view.tag == 5) {
}
}

How to make stationary background view in UITableView?

I'm trying to add a view behind my grouped UITableView. Unfortunately, whenever I scroll, the background view moves as well. This happens even when I use [self.view insertSubview:backgroundView belowSubview:_tableView], or [_tableView setBackgroundView:backgroundView]. Why is this background view scrolling? Also, why does my tableView scroll, even though I have disabled scrolling? Are these related?
In app Delegate:
History *historyController = [[History alloc] init];
UINavigationController *nc = [[UINavigationController alloc] initWithRootViewController:historyController];
In History.m:
- (void)viewDidLoad {
CGRect frame = self.view.frame;
frame.origin.x = 0;
frame.origin.y = 0;
_tableView = [[UITableView alloc] initWithFrame:frame style:UITableViewStyleGrouped];
_tableView.delegate = self;
_tableView.dataSource = self;
[_tableView setScrollEnabled:NO];
[_tableView setBackgroundColor:[UIColor clearColor]];
_tableView.separatorStyle = UITableViewCellSeparatorStyleNone;
UIView *bg = [[UIView alloc] initWithFrame:frame];
[bg setBackgroundColor:[UIColor scrollViewTexturedBackgroundColor]];
UIImageView *iv = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"CenterFade.png"]];
iv.alpha = .750;
[bg addSubview:iv];
[iv release]; iv = nil;
[self.view addSubview:bg];
[self.view addSubview:_tableView];
[bg release]; bg = nil;
[_tableView release];
[super viewDidLoad];
}
Try
- (void)viewDidLoad {
CGRect frame = self.view.frame;
frame.origin.x = 0;
frame.origin.y = 0;
UIView *bg = [[UIView alloc] initWithFrame:frame];
[bg setBackgroundColor:[UIColor scrollViewTexturedBackgroundColor]];
UIImageView *iv = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"CenterFade.png"]];
iv.alpha = .750;
[bg addSubview:iv];
[iv release];
iv = nil;
_tableView = [[UITableView alloc] initWithFrame:frame style:UITableViewStyleGrouped];
_tableView.delegate = self;
_tableView.dataSource = self;
[_tableView setScrollEnabled:NO];
[_tableView setBackgroundColor:[UIColor clearColor]];
_tableView.separatorStyle = UITableViewCellSeparatorStyleNone;
[bg addSubview:_tableView];
[_tableView release];
_tableView = nil;
[self.view addSubview:bg];
[bg release];
bg = nil;
[super viewDidLoad];
}
If your controller is an UITableViewController just change it to an UIViewController<UITableViewDelegate, UITableViewDatasource> with a tableView property (It's the same)
I don't know why this is happening, but for some reason self.view is a UITableView and not a UIView. Creating a new UIView and setting it to self.view fixed the problem. I am not using a UITableViewController, but a UIViewController. No idea where the UITableView is coming from!
set [_tableView setBackgroundColor:[UIColor clearColor]];
and then put your background view under UITableView in UIViewController view hierarchy.
UITableView has a backgroundView property.
Swift:
var backgroundView: UIView?
Objective-C
#property(nonatomic, readwrite, retain) UIView *backgroundView
This view will not be moved when you scroll the tableView

why doesn't view2 appear in this code? (incorporating UIView 2 within UIView 1)

Why doesn't view2 appear in this code? In the result I see the local View1 label shown, at the top with a red border, and within the overall green border, however I see nothing of view2? That is the label with text "View2 Label Text", does NOT appear.
test11ViewController.m
#implementation test11ViewController
- (void)viewDidLoad
{
[super viewDidLoad];
View1 *view1 = [[[View1 alloc] initWithFrame:CGRectMake(0.0, 0.0, 400, 100) ] autorelease];
view1.layer.borderColor = [UIColor redColor].CGColor;
view1.layer.borderWidth = 1;
[self.view addSubview:view1];
}
#end
View1.m
#implementation View1
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
// Local Label
CGFloat width = self.frame.size.width;
UILabel *label = [[[UILabel alloc] initWithFrame:CGRectMake(0.0, 0.0, width, 30)] autorelease];
label.text = #"View1 Label Text";
label.layer.borderColor = [UIColor greenColor].CGColor;
label.layer.borderWidth = 1.0;
[self addSubview:label];
// External - Label2
View2 *view2 = [[[View2 alloc] initWithFrame:CGRectMake(0.0, 30, width, 30)] autorelease];
[super addSubview:view2];
}
return self;
}
#end
View2.m
#implementation View2
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
CGFloat width = self.frame.size.width;
UILabel *label = [[[UILabel alloc] initWithFrame:CGRectMake(0.0, 0.0, width, 30)] autorelease];
label.text = #"View2 Label Text"; // Does NOT appear in output
label.layer.borderColor = [UIColor blueColor].CGColor;
label.layer.borderWidth = 1.0;
}
return self;
}
#end
view2 isn't actually adding the label to itself. You're missing this:
[self addSubview:label];
In other words, try:
#implementation View2
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
CGFloat width = self.frame.size.width;
UILabel *label = [[[UILabel alloc] initWithFrame:CGRectMake(0.0, 0.0, width, 30)] autorelease];
label.text = #"View2 Label Text"; // Does NOT appear in output
label.layer.borderColor = [UIColor blueColor].CGColor;
label.layer.borderWidth = 1.0;
[self addSubview:label]; // NEW LINE HERE
}
return self;
}
#end
In your test view controller line after...
[self.view addSubview:view1];
...add...
[self.view sendSubviewToBack:view1];
Does view2 show now? Alertnately, set the alpha of both views to 0.5 to make sure one is not obscuring the other.

How do I put viewController's into a UIScrollView

I want to initialize 5 viewController's that I want to be able to flick between in a UIScrollView, when my app loads.
Here is an example of how you can do this:
- (void)viewDidLoad
{
//standard UIScrollView is added
UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, 320, 460)];
[self.view addSubview:scrollView];
scrollView.pagingEnabled = YES;
scrollView.contentSize = CGSizeMake(320*2, 460); //this must be the appropriate size!
//required to keep your view controllers around
controllers = [[NSMutableArray alloc] initWithCapacity:0];
//just adding two controllers
LabeledViewController *one = [[LabeledViewController alloc] initWithPosition:0 text:#"one"];
[scrollView addSubview:one.view];
[controllers addObject:one];
LabeledViewController *two = [[LabeledViewController alloc] initWithPosition:1 text:#"two"];
[scrollView addSubview:two.view];
[controllers addObject:two];
}
LabeledViewController is pretty simple, but you can add as much to it as you want:
#implementation LabeledViewController
- (id)initWithPosition:(NSInteger)position text:(NSString*)text
{
if (self = [super init]) {
myPosition = position;
myText = [text retain];
}
return self;
}
- (void)viewDidLoad
{
//this will setup the position in the UIScrollView
UIView *view = [[UIView alloc] initWithFrame:CGRectMake(320*myPosition, 0, 320, 460)];
self.view = view;
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(100, 100, 320, 50)];
label.text = myText;
[self.view addSubview:label];
}