downPreView = [[UIProgressView alloc] initWithProgressViewStyle:UIProgressViewStyleDefault];
downPreView.tag = indexPath;
downPreView.frame = CGRectMake(75,28, 215,60);
downPreView.progress = 0.0;
[cell.contentView addSubview:downPreView];
Now how do I start animating downPreView with a tag of 2, etc?
Thanks!
You can grab a view with the viewWithTag method. Like [cell.contentView viewWithTag:1]
Update
First of all. You cant animate a progressView, you can show it, hide it, and you can edit it's progress level. If you want to edit it's progress, you have to set it like [downPreView setProgress:0.1]. If it's set to 1 the progrees indicator will be at the end.
However if you want just a spinner, you can use UIActivityIndicatorView.
If you cant get the cell, then you can use it's parent view. Like [self.view viewWithTag:1]
After this you have to cast UIProgressView on it to avoid warnings.
UIProgressView *progressView = (UIProgressView *)[self.view viewWithTag:1];
progressView.progress = 0.1;
For more info about UIActivityIndicatorView please see the documentation.
You cannot access an object by it's tag, you have to retain the object if you want access. Say if you have an array of progress views... you can enumerate it and ask
if (object.tag == tagWanted) {
doSomething;
}
Related
I want to change the titleView of navigationBar with a regular text field. Then I want to set the textField size to fill the old "normal" titleView.
I can't seem to be able to do this in storyBoard. Dragging a text Field to the place where the navigation title View is doesn't work.
So I added stuff at
-(void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
PO(self.navigationItem.titleView);
CGRect theFrame= self.navigationItem.titleView.frame;
self.navigationItem.titleView=self.searchBar;
//self.searchBar.frame = theFrame;
while (false);
...
It's working with one cached. That PO is a macro that print the content of the object. Turns out at viewDidAppear, self.navigationItem.titleView is null.
So while I can display the searchBar, I cannot make the searchBar "fill" it's space because I do not know the space is.
I prefer not to hard code it because you know, things may change in the future.
So what should I do?
I once saw codes where rather than setting the self.navigationItem.titleView, you would simply add subview to it. The problem with this approach even on viewDidAppear, self.navigationItem.titleView is 0.
I added these codes:
CGRect theFrame= self.navigationItem.titleView.frame;
CGRect theFrame2 = self.searchBar.frame;
CGRect theFrame3 = self.navigationController.navigationItem.titleView.frame;
And, I do not know how to nslog structure value, however, theFrame and theFrame3 are all 0
You can try this inside viewWillAppear:
UIView *customTitleView = [[UIView alloc]initWithFrame:CGRectMake((320-210)/2, 0, 210, 50)];
customTitleView.backgroundColor = [UIColor clearColor];
//create your UITextField or UILabel or other view and add as subview of customTitleView
self.navigationItem.titleView = customTitleView;
I have an UIImageViews with userInteractionEnabled, and i want to know with image i currently tap. What i should do to know that? I have a poster wall and class for that ThumbPosterModel there i have all poster information with i want to pass through.
So my code is:
for (ThumbPosterModel *tPoster in _thumbsPosterStack) {
UIImageView *imageView = [[UIImageView alloc] initWithImage:tPoster.thumb];
imageView.userInteractionEnabled = YES;
imageView.frame = CGRectMake(i, imageView.frame.origin.y, imageView.frame.size.width, imageView.frame.size.height);
[_posterWallScrollView addSubview:imageView];
UITapGestureRecognizer *tap =
[[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(imageTapped:)];
[imageView addGestureRecognizer:tap];
}
And then i have:
-(IBAction)imageTapped:(id)sender {
//something do here, but know i don't know what.
}
Should i subclass UIImageView that should contains all ThumbPosterModel params? I don't think it is good idea, but i can't figure any other solution.
Ok this is very simple just add tag proprty of each image with appropriate and distinct value other then 0 and use that proprty to identify the image :)
Happy Coding :)
When the gesture recognizer is fired the sender in the action is the recognizer, so you can get the UIView it is attached to by calling [sender view];
So you could write a method which searched the thumbs poster stack and found the poster with the matching thumb, but it would probably be easier to create a UIImageView subclass which contains a reference to the poster. So when you get the view just do
PosterImageView *selectedPosterView = (PosterImageView *) [sender view];
ThumbPosterModel *selectedModel = selectedPosterView.model;
Set a tag to your each imageView.
Each for loop iteration add your image view to a NSMutableArray (arrayRef).
Accessing the tag of image view when you tap the image view(tagImage) .
then
UIIMageView *imageViewR=[arrayRef objectAtIndex:tagImage-1];
The imageViewR is the tap imageView
enter code hereI have a UITableViewCell, to which i have added a custom UIView which is actually a button. I have added the custom UIView programmatically, and set its .tag = 4. The code to draw the button and set the tag is being done in cellForRowAtIndexPath.
I have a function which receives notifications that events have happened, and in this function i am trying to get a pointer to the button in the UITableViewCell so i can change the text on the button, but when i try to retrieve the viewWithTag property, it keeps being returned as 0.
Any ideas?
This is how the button is added to the code:
CustomBadge *customBadge1 = [CustomBadge customBadgeWithString:[NSString stringWithFormat:#"%d", [plugin items]]<br>withStringColor:[UIColor whiteColor]
withInsetColor:[UIColor redColor]
withBadgeFrame:YES
withBadgeFrameColor:[UIColor whiteColor]
withScale:1.0
withShining:YES];
[customBadge1 setFrame:CGRectMake(cell.frame.size.width - 80, 10, 30, 25)];
customBadge1.tag = 4;
[cell addSubview:customBadge1];
Then in a delegate function, this is how i am trying to get a pointer to the button:
CustomBadge* itemBadge = (CustomBadge*) [[[pluginTableView cellForRowAtIndexPath:[NSIndexPath indexPathForRow:i inSection:0]] contentView] viewWithTag:4];
Does your tableview allow editing? At one point I noticed that iOS would assign its own views with low-numbered-tags when you switched into editing mode. It could be stealing your tag away... Try a high numbered tag, or use a custom UITableViewCell subclass and get an IBOutlet to the UIView (I always go for this option, it saves a lot of heartache down the line.)
Oh FFS.
I forgot the ".contentview" when i was adding the item to the cell subview.
Thanks to Melvin and jsd for the reponses.
I'm trying to create horizontal scroll view(s). Each view containing one image. [done]
Initially when app is opened I'd display couple of images i.e 3, so user can scroll back and forth between images. [done]
However I want to be able to go to another view controller and pick another image(s) maybe two for example and display five images in the scroll view instead of displaying 3 initially.
How would one do that? to "re-refresh" the initial scroll view ?
Update
Should I use delegate for this communication between view controllers? or how is this done?
1 main controller, other containing image selection?
This part above and much more explained by article here.(not advertising, I hope it will help someone as well).
Bounty update part 1 :
I think now that I found my way around delegates, I have additional question that I cannot find answer to, all examples I saw were about updating table views.
Bounty part 2 :
If I were to have a scrollview inside my view controller and some nsimages inside scroll view. i.e :
- (void)viewDidLoad {
[super viewDidLoad];
NSMutableArray *images = ...some images array;
for (int i = 0; i < images.count; i++) {
CGRect frame;
frame.origin.x = self.scrollView.frame.size.width * i;
frame.origin.y = 0;
frame.size = self.scrollView.frame.size;
UIImageView *subview = [[UIImageView alloc] initWithFrame:frame];
subview.image = [images objectAtIndex:i];
[self.scrollView addSubview:subview];
}
self.scrollView.contentSize = CGSizeMake(self.scrollView.frame.size.width * images.count, self.scrollView.frame.size.height);
}
And let say my view controller implemented some delegate method didAddImage or didRemoveImage.
Meaning that about images array would get updated.
Actual bounty question :
How would one actually "tell" the view controller, O.K now your scrollview has one more image to display, please re-fresh or reload?
If I were to have a table view instead scroll view and was inserting images I'd do it something like this(in my delegate method) :
-(void) mockDelegatetablemethod:(...) ...{
[self.images addObject:image];
NSIndexPath *indexPath =
[NSIndexPath indexPathForRow:[self.images count] - 1
inSection:0];
[self.tableView insertRowsAtIndexPaths:
[NSArray arrayWithObject:indexPath]
withRowAnimation:UITableViewRowAnimationAutomatic];
[self dismissViewControllerAnimated:YES completion:nil];
}
How would one do this to the scrollview?
Bounty update part 3:
This is "simple" case described above, naturally I'd have to support removing images also as well as if one wants to remove all images and add some new.
How would one actually "tell" the view controller, O.K now your
scrollview has one more image to display, please re-fresh or reload?
Well, you would just add the new image as a subview of the scroll view. So something like:
- (void)addImage:(UIImage*)image {
[images addObject:image];
CGRect frame;
frame.origin.x = self.scrollView.frame.size.width * images.count;
frame.origin.y = 0;
frame.size = self.scrollView.frame.size;
UIImageView *subview = [[UIImageView alloc] initWithFrame:frame];
subview.image = image;
[self.scrollView addSubview:subview];
self.scrollView.contentSize = CGSizeMake(self.scrollView.frame.size.width * images.count, self.scrollView.frame.size.height);
}
Or you could have a method that goes and "resets" the scroll view by removing all subviews and then re-adds all the images in your images array. Then call this method in viewDidLoad instead of your code there so that you're not duplicating code.
Basically, there's no silver bullet here. You roll your own.
You're going to need make your image scroller a class that you can tell to load up certain images. You'll need a reference to the existing image scroller, pass that pointer into your other "pick more images" controller. Then the "pick more images" controller can tell the image scroller that there is a new list of images.
This is already implemented by Apple in their iOS sample project "PhotoScroller". It has view reuse as well. They even have a WWDC 2010 video on this. I think its advanced scrollview techniques OR designing apps with scrollviews.
Shouldn't be hard to port over to mac
I'm working on a custom UITableViewCell subclass, where everything is drawn in code rather than using UILabels etc. (This is part learning exercise and partly because drawing in code is much faster. I know that for a couple of labels it wouldn't make a huge difference, but eventually I'll want to generalise this to more complex cells.)
Currently I'm struggling with the delete button animation: how to animate the cell shrinking as the delete button slides in.
Firstly, I am drawing in a custom subview of the cell's contentView. Everything is drawn in that one subview.
I am setting the subview's size by catching layoutSubviews on the cell itself, and doing:
- (void)layoutSubviews
{
[super layoutSubviews];
CGRect b = [self.contentView bounds];
[subcontentView setFrame:b];
}
I'm doing this rather than just setting an autoresizing mask because it seemed more reliable in testing, but I can use the autoresizing mask approach in testing if needed.
Now, the default thing that happens when someone hits the minus is the view gets squished.
I can avoid that by, when setting up my cell, calling
subcontentView.contentMode = UIViewContentModeRedraw;
That gives me the correct end result (my custom view redraws with the new size, and is laid out properly, like the first image I posted), but the animation of the transition is unpleasant: it looks like the cell stretches and shrinks back to size.
I know why the animation is working like that: Core Animation doesn't ask your view to redraw for each frame, it gets it to redraw for the end position of the animation and then interpolates to find the middle bits.
Another solution is to do
subcontentView.contentMode = UIViewContentModeLeft;
That just draws the delete button over my cell, so it covers part of it.
If I also implement
- (void) didTransitionToState:(UITableViewCellStateMask)state
{
[self setNeedsDisplay];
}
then once the delete button has slid in the cell 'jumps' to the correct size. That way there's no nice slidey animation, but at least I get the correct result at the end.
I guess I could run my own animation in parallel with the delete button appearing, temporarily creating another view with a copy of the image of my view in the old size, setting mine to the new size, and fading between them — that way there would be a nice cross fade instead of a sharp jump. Anyone use such a technique?
Now, you might ask why I can't use the contentStretch property and give it a region to resize. The problem with that is I'm making something to be reasonably generic, so it's not always going to be possible. In this particular example it'd work, but a more complex cell may not.
So, my question (after all of this background) is: what do you do in this situation? Does anyone have the animating delete button working for custom drawn cells? If not, what's the best compromise?
This worked for me finally. in subclass of UITableViewCell
subDrawContentView.contentMode = UIViewContentModeLeft;
overide layout subviews method
- (void)layoutSubviews {
CGRect b = [subDrawContentView bounds];
b.size.width = (!self.showingDeleteConfirmation) ? 320 : 300;
[subDrawContentView setFrame:b];
[subDrawContentView setNeedsDisplay];
[super layoutSubviews];
}
So I will paste the code first and then I will explain:
-(void)startCancelAnimation{
[cancelButton setAlpha:0.0f];
[cancelButton setFrame:CGRectMake(320., cancelButton.frame.origin.y, cancelButton.frame.size.width, cancelButton.frame.size.height)];
cancelButton.hidden=NO;
[UIView animateWithDuration:0.4
animations:^(void){
[progressView setFrame:CGRectMake(progressView.frame.origin.x, progressView.frame.origin.y, 159.0, progressView.frame.size.height)];
[text setFrame:CGRectMake(text.frame.origin.x, text.frame.origin.y, 159.0, text.frame.size.height)];
[cancelButton setFrame:CGRectMake(244., cancelButton.frame.origin.y, cancelButton.frame.size.width, cancelButton.frame.size.height)];
[cancelButton setAlpha:1.0f];
} ];
}
-(void)stopCancelAnimation{
[UIView animateWithDuration:0.4
animations:^(void){
[cancelButton setFrame:CGRectMake(320., cancelButton.frame.origin.y, cancelButton.frame.size.width, cancelButton.frame.size.height)];
[cancelButton setAlpha:0.0f];
}completion:^(BOOL completion){
cancelButton.hidden=YES;
[cancelButton setAlpha:1.0f];
[progressView setFrame:CGRectMake(progressView.frame.origin.x, progressView.frame.origin.y, DEFAULT_WIDTH_PROGRESS, progressView.frame.size.height)];
[text setFrame:CGRectMake(text.frame.origin.x, text.frame.origin.y, DEFAULT_WIDTH_TEXT, text.frame.size.height)];
}
];
}
-(void)decideAnimation{
if([cancelButton isHidden]){
[self startCancelAnimation];
}
else{
[self stopCancelAnimation];
}
}
So what I have there is a button that looks like this:
I have an IBOutlet to it. And what I am doing is resizing a UIProgressView and a UITextField (you can resize whatever you want). As for the code is pretty simple, but if you need any help to understand what's going on, please ask. Also, don't forget to add the Swip Gesture to the UITableView... Like this:
UISwipeGestureRecognizer *gesture = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:#selector(didSwipe:)];
gesture.numberOfTouchesRequired=1;
gesture.direction = UISwipeGestureRecognizerDirectionRight;
[table addGestureRecognizer:gesture];
[gesture release];
Finally the method that does it all:
-(void)didSwipe:(UIGestureRecognizer *)gestureRecognizer {
if (gestureRecognizer.state == UIGestureRecognizerStateEnded) {
//Get the cell of the swipe...
CGPoint swipeLocation = [gestureRecognizer locationInView:self.table];
NSIndexPath *swipedIndexPath = [self.table indexPathForRowAtPoint:swipeLocation];
UITableViewCell* swipedCell = [self.table cellForRowAtIndexPath:swipedIndexPath];
//Make sure its a cell with content and not an empty one.
if([swipedCell isKindOfClass:[AMUploadsTableViewCell class]]){
// It will start the animation here
[(AMUploadsTableViewCell*)swipedCell decideAnimation];
// Do what you want :)
}
}
}
So as you can see the whole animation is created manually, so you can control exactly what you want. :)