I want to show an image (larger then the screen of the iphone), that the user can scroll.
Isn't difficoult, i've done with this code:
in my .h file
#interface mappa1 : UIViewController <UIScrollViewDelegate> {
IBOutlet UIImageView *img;
IBOutlet UIScrollView *scroller;
}
in my .m file
UIImage *image = [UIImage imageNamed:#"prova.jpg"];
img = [[UIImageView alloc] initWithImage:image];
scroller.delegate = self;
scroller.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
scroller.contentSize = img.frame.size;
scroller.scrollEnabled = YES;
scroller.directionalLockEnabled = NO;
scroller.userInteractionEnabled = YES;
CGSize ivsize = img.frame.size;
CGSize ssize = scroller.frame.size;
float scalex = ssize.width / ivsize.width;
float scaley = ssize.height / ivsize.height;
scroller.maximumZoomScale = 1.0;
scroller.minimumZoomScale = fmin(1.0, fmax(scalex, scaley));
scroller.zoomScale = fmin(1.0, fmax(scalex, scaley));
[scroller addSubview:img];
and
- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView {
return img;
}
and all works fine!
Now i want to add an UIButton on the UIImage, not on the UIView, because i want that if the user zooms or moves the image, the uibutton follow the movement/zoom of the uiimage.
So i add this code:
UIButton *btn = [[UIButton buttonWithType:UIButtonTypeRoundedRect] retain];
btn.frame = CGRectMake(0, 0, 100, 25);
[btn setTitle:#"Play" forState:UIControlStateNormal];
[btn addTarget:self action:#selector(buttonClick) forControlEvents:UIControlEventTouchUpInside];
[img addSubview:btn];
but the UIButton is "not-clickable"!
Of course, the UIView and the UIImageView has UserInteractionEnabled set to YES!
Thanks!
EDIT: if i write
[scroller addSubView:btn];
it works but, of course, if the user zoom in/out, the UIButton is always big 100x25.
SOLVED!
I don't know why, but if i checked UserInteractionEnabled (on the UIImageView) in Interface Builder, it doesn't works.
If i write
img.UserInteractionEnabled = YES;
it works!
i tried this and it works for me.......
UIImageView * imageView = [[UIImageView alloc]init];
[imageView setImage:[UIImage imageNamed:#"image.jpeg"]];
[imageView setFrame:CGRectMake(10,10,300,300)];
[imageView setContentMode:UIViewContentModeScaleToFill];
[imageView setUserInteractionEnabled:TRUE];
UIButton * ButtonOnImageView = [[UIButton alloc]init];
[ButtonOnImageView setFrame:CGRectMake(135,120,60,30)];
[ButtonOnImageView setImage:[UIImage imageNamed:#"image.jpeg"] forState:UIControlStateHighlighted];
[ButtonOnImageView setImage:[UIImage imageNamed:#"image2.jpeg"] forState:UIControlStateNormal];
[ ButtonOnImageView addTarget:self action:#selector(OnClickOfTheButton) forControlEvents:UIControlEventTouchUpInside];
[imageView addSubview:ButtonOnImageView];
[self.view addSubview:imageView];
This Code May be usefull to You
http://developer.apple.com/library/ios/#samplecode/Scrolling/Listings/MyViewController_m.html#//apple_ref/doc/uid/DTS40008023-MyViewController_m-DontLinkElementID_6
Related
I'm making an app. My app is based off this sample project. https://github.com/yeahdongcn/RSCircaPageControl
In the app there is a view. On the view, there is a scroll view (UIScrollView *scrollView) which allows to 10 "pages" of content. Within each page, there is another scroll view (UIScrollView *sv) which is a subview of *scrollView.
On SV, I then added a button called UIButton *button. When I attempt to change the button's images after a time of "two minutes," nothing happens. This is because there are 10 buttons. I need to change the image of the button on only one of the pages. Not all of them.
Something tells me it needs "object at index" or something to specify which button on which page I want to change.
The code is below! Thanks guys!
- (void)viewDidLoad
{
[super viewDidLoad];
self.clipView = [[RSView alloc] initWithFrame:CGRectMake(0, 0, self.view.bounds.size.width, self.view.bounds.size.height)];
self.clipView.clipsToBounds = YES;
[self.view addSubview:self.clipView];
self.scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, self.clipView.bounds.size.width, kScrollViewHeight)];
self.scrollView.delegate = self;
self.scrollView.clipsToBounds = NO;
self.scrollView.pagingEnabled = YES;
self.scrollView.showsHorizontalScrollIndicator = NO;
self.scrollView.showsVerticalScrollIndicator = NO;
self.scrollView.autoresizingMask = UIViewAutoresizingFlexibleWidth;
[self.view addSubview:self.scrollView];
self.clipView.scrollView = self.scrollView;
self.pageControl = [[RSCircaPageControl alloc] initWithNumberOfPages:10];
CGRect frame = self.pageControl.frame;
frame.origin.x = self.view.bounds.size.width - frame.size.width - 10;
frame.origin.y = roundf((self.view.bounds.size.height - frame.size.height) / 2.);
self.pageControl.frame = frame;
self.pageControl.autoresizingMask = UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleBottomMargin;
[self.pageControl setCurrentPage:0 usingScroller:NO];
[self.view addSubview:self.pageControl];
CGFloat currentY = 0;
for (int i = 0; i < 10; i++) {
UIScrollView *sv = [[UIScrollView alloc] initWithFrame:CGRectMake(0, currentY, self.scrollView.bounds.size.width, kScrollViewHeight)];
sv.tag = kScrollViewTagBase + i;
sv.delegate = self;
sv.autoresizingMask = UIViewAutoresizingFlexibleWidth;
sv.backgroundColor = [UIColor colorWithRed:(arc4random() % 257) / 256. green:(arc4random() % 257) / 256. blue:(arc4random() % 257) / 256. alpha:1];
///here's the buttton!!
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
UIImage*normal = [UIImage imageNamed:#"girl.jpg"];
UIImage*selected = [UIImage imageNamed:#"girl2.jpg"];
button.frame = CGRectMake(100, 100, 50,50));
[button setImage:normal forState:UIControlStateNormal];
[button setImage:selected forState:UIControlStateHighlighted];
button.contentMode = UIViewContentModeScaleAspectFit;
[button addTarget:self
action:#selector(myButtonPressed:)
forControlEvents:UIControlEventTouchDown];
[sv addSubview:button]; //notice that the button is added as a subview of SV
[self.scrollView addSubview:sv]; // notice that SV is a subview of the scrollView.
if (i == 2 || i == 6) {
sv.contentSize = CGSizeMake(sv.contentSize.width, kScrollViewContentHeight);
}
currentY += kScrollViewHeight;
}
self.scrollView.contentSize = CGSizeMake(self.scrollView.contentSize.width, currentY);
[self performSelector:changeButtomImages withObject:nil afterDelay:TwoMinutes];
}
- (void)changeButtonImages {
UIImage*normal2 = [UIImage imageNamed:#"boy.jpg"];
UIImage*selected2 = [UIImage imageNamed:#"boy2.jpg"];
[button setImage:normal2 forState:UIControlStateNormal];
[button setImage:selected2 forState:UIControlStateHighlighted];
}
Kyle
for setting button image in a normal state the parameter to pass forState: is UIControlStateNormal not UIControlStateHighlighted
So, in changeButtonImages you are changing the the image for the iVar "button", but you are never actually assigning anything to that button var. In your for loop in viewDidLoad, you are creating a local variable of UIButton called button. Maybe something like this?
- (void)myButtonPressed:(id)sender
{
UIButton *button = (UIButton *)sender;
UIImage*normal2 = [UIImage imageNamed:#"boy.jpg"];
UIImage*selected2 = [UIImage imageNamed:#"boy2.jpg"];
[button setImage:normal2 forState:UIControlStateNormal];
[button setImage:selected2 forState:UIControlStateHighlighted];
}
I have an customised UINavigationcontroller created by me programatically.
The Problem is with the back button which comes as a default in UINavigationBar is not seen in IOS6 but when i press it the action can be done.
NOTE: The back button is seen in IOS5.
Here is my code that i had used
- (void)customizeNavigationController:(UINavigationController *)navController
{
UINavigationBar *navBar = [navController navigationBar];
[navBar setTintColor:keyNavBarTintColor];
UIImageView *myImageView = (UIImageView *)[navBar viewWithTag:keyNavBarBackgroundImageTag];
if (myImageView == nil)
{
UIImage *img = [UIImage imageNamed:#"image.png"];
CGRect rect = CGRectMake(0, 0, navBar.frame.size.width, navBar.frame.size.height);
myImageView = [[UIImageView alloc] initWithFrame:rect];
[myImageView setContentMode:UIViewContentModeScaleAspectFill];
[myImageView setAutoresizingMask:UIViewAutoresizingFlexibleWidth];
myImageView.image = img;
[myImageView setTag:keyNavBarBackgroundImageTag];
[navBar addSubview:myImageView];
[myImageView release];
}
self.navImageView = myImageView;
}
Try this:
UIImage *image = [UIImage imageNamed:kButtonBackInActive];
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
[button setImage:image forState:UIControlStateNormal];
[button addTarget:self action:#selector(goBack) forControlEvents:UIControlEventTouchUpInside];
[button setFrame:CGRectMake(0, 0, 39.0f, 44.0f)];
button.contentEdgeInsets = (UIEdgeInsets){.left=-8};
button.showsTouchWhenHighlighted = NO;
UIBarButtonItem * backbutton = [[[UIBarButtonItem alloc] initWithCustomView:button] autorelease];
[self.navigationItem setLeftBarButtonItem:backbutton];
How can i code for UIButton to show only when user taps on UIScrollView for images.
- (void)viewDidLoad
{
self.view.backgroundColor = [UIColor blackColor];
UIScrollView *imageScrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];
imageScrollView.pagingEnabled = YES;
NSInteger numberOfViews = 61;
for (int i = 0; i < numberOfViews; i++) {
CGFloat xOrigin = i * self.view.frame.size.width;
UIButton *myButton = [UIButton buttonWithType:UIButtonTypeCustom];
[myButton addTarget:self action:#selector(dismissView:) forControlEvents:UIControlEventTouchUpInside];
myButton.frame = CGRectMake(xOrigin, 10, 60, 35);
[myButton.layer setMasksToBounds:YES];
[myButton.layer setCornerRadius:10.0f];
myButton.layer.borderWidth = 2;
myButton.layer.borderColor = [[UIColor whiteColor] CGColor];
[myButton setTitle:#"Done" forState:UIControlStateNormal];
myButton.backgroundColor = [UIColor blackColor];
NSString *imageName = [NSString stringWithFormat:#"image%d.png", i];
UIImage *image = [UIImage imageNamed:imageName];
UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
imageView.frame = CGRectMake(xOrigin, 0, self.view.frame.size.width, self.view.frame.size.height);
[imageScrollView addSubview:imageView];
[imageScrollView addSubview:myButton];
[imageView release];
}
imageScrollView.contentSize = CGSizeMake(self.view.frame.size.width * numberOfViews, self.view.frame.size.height);
[self.view addSubview:imageScrollView];
[imageScrollView release];
}
Right now it is displaying on every image view but i want it should Show UIButton Done only when taps on the screen.
EDIT: If i add
[imageView addGestureRecognizer: tap];
and initiate Gesturerecognizer
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(handleTap:)];
tap.numberOfTapsRequired = 1;
[self addGestureRecognizer:tap];
[tap release];
then how can i code in handle tap method to show done button when user taps on image view
- (void)handleTap:(UIGestureRecognizer*)tap {
}
Thanks for help.
You need to add the gesture recognizer on the image view and not on the ViewController.
Also, you need to enable the user interaction for the image view like this:
imageView.userInteractionEnabled = YES;
Check UIScrollViewDelegate Method when you will scroll show your button will be shown and then if you want to hide that button hide it.
And for handleTap you set [imageView addGestureRecognizer:tap]; instead of [self addGestureRecognizer:tap];
create your button in ViewDidLoad and hide it initially and when user will tap image just set`
button.hidden = NO;
i'm extending UITableViewController and have a uibutton added programtticly to the table footer , for some reason the uibutton fire only when touch in the top part ... as if someting is masking the rest of it and i can't understand what it is
i have the following code at viewForFooterInSection function:
CGRect screenRect = [[UIScreen mainScreen] applicationFrame];
UIView* footerView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, screenRect.size.width, 44.0)];
footerView.autoresizesSubviews = YES;
footerView.autoresizingMask = UIViewAutoresizingFlexibleWidth;
footerView.userInteractionEnabled = YES;
goButton = [UIButton buttonWithType:UIButtonTypeCustom];
[goButton addTarget:self action:#selector(getReport)forControlEvents:UIControlEventTouchUpInside];
[goButton setTitle:#"GO!" forState:UIControlStateNormal];
[goButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
goButton.frame = CGRectMake(50, 20, 220.0, 50.0);
UIImage *bg = [UIImage imageNamed: #"but_go.png"];
[goButton setBackgroundImage:bg forState:UIControlStateNormal];
[goButton setBackgroundColor:[UIColor clearColor]];
if (self.optimizations == nil || self.optimizations.count < 1){
goButton.enabled = NO ;
}
[footerView addSubview: goButton];
return footerView;
It's because the button's frame fell out of its parent view. You need to increase your footerView's frame size so the whole part of the button contains in the footerView. You can try to set footerView background color to blue or red to see the actual frame area.
guys, i want to click my uiButton after it's added to UIImageVIew, but it doesn't work.
this is my code :
UIButton *btnDetail = [[UIButton buttonWithType:UIButtonTypeDetailDisclosure]retain];
btnDetail.frame = CGRectMake(0,0,100,100);
[btnDetail addTarget:self action:#selector(buttonClicked) forControlEvents:UIControlEventAllTouchEvents];
[self.imageView addSubview:btnDetail];
the button can't click when i add it to UIImageVIew, but if i don't add it to UIImageView, it works properly.
please somebody help me
Note: By default the UserInteraction property of UIImageView is set to NO. This the place where most of us makes mistake.
So the main thing to check in while adding any control to UIImageView is to set its UserInteractionEnabled property to YES.
[self.imageView setUserInteractionEnabled:YES];
So modify your code as below:
UIButton *btnDetail = [[UIButton buttonWithType:UIButtonTypeDetailDisclosure]retain];
btnDetail.frame = CGRectMake(0,0,100,100);
[btnDetail addTarget:self action:#selector(buttonClicked) forControlEvents:UIControlEventAllTouchEvents];
[self.imageView addSubview:btnDetail];
[self.imageView bringSubviewToFront:btnDetail];
[self.imageView setUserInteractionEnabled:YES];
HAppy Coding...
UIImageView has userInteractionProperty set to NO by default so it does not handle touches and does not propagate them to its subviews. Try to set it to YES:
self.imageView.userInteractionEnabled = YES;
hey i had use this code. its working properly
UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
button.frame = CGRectMake(80.0, 210.0, 100.0, 20.0);
[button addTarget:self action:#selector(show) forControlEvents:UIControlEventTouchUpInside];
[button setTitle:#"ShowView" forState:UIControlStateNormal];
[image2 addSubview:button];
[image2 bringSubviewToFront:button];
[image2 setUserInteractionEnabled:YES];
If someone has interaction problem with UIButton in UIImageView do next steps.
1 Create property of UIImageView:
#property (nonatomic, strong) UIImageView *buttonImageView;
2 Than synthesize it:
#synthesize buttonImageView = _buttonImageView;
3 Create implementation method:
- (UIImageView *) buttonImageView {
_buttonImageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 320, 100)];
[_buttonImageView setBackgroundColor:[UIColor whiteColor]];
[_buttonImageView setUserInteractionEnabled:YES];
UIButton *addButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[addButton setTitle:#"add button" forState:UIControlStateNormal];
addButton.frame = CGRectMake(0, 0, 160, 50);
[addButton setUserInteractionEnabled:YES];
[addButton setEnabled:YES];
[addButton setAlpha:1];
[addButton addTarget:self action:#selector(addNewImage) forControlEvents:UIControlEventTouchUpInside];
return _buttonImageView;
}
4 For example in viewDidLoad method add subview to your view:
[self.view addSubview:self.buttonImageView];