So I've seen a whole bunch of resources an answers to similar questions regarding how to change the position of a UIImageView, which can be done like this:
myUIImageView.center = CGPointMake(myImage_X, myImage_Y);
But I can not get this to work when I have my UIImageView animating.
I start my animation like this:
myUIImageView.animationImages = [NSArray arrayWithObjects:
[UIImage imageNamed:#"img1.png"],
[UIImage imageNamed:#"img2.png"],
[UIImage imageNamed:#"img3.png"],nil];
[myUIImageView setAnimationRepeatCount:0];
myUIImageView.animationDuration = 1.0;
[myUIImageView startAnimating];
Then try to move it with the line of code above... which didn't work.
Then I tried this after setting it as a property and synthesising it:
[myUIImageView setFrame:CGRectMake( 10,
10,
myUIImageView.frame.size.width,
myUIImageView.frame.size.height
)];
But it doesn't move the image :(
Currently my image is animating on the spot. But I want it to initially change position (set the coords to top of the screen), then have it fall in the Y direction. Am I doing something silly?
Related
So i have this code that animates a set of images an unlimited amount of times just fine, however as soon as i try to limit the number of times it animates it simply does not work. No image is even displayed.
Code that works:
animatedMap.animationImages = [NSArray arrayWithObjects:
[UIImage imageNamed:#"0.gif"],
[UIImage imageNamed:#"1.gif"],
[UIImage imageNamed:#"2.gif"],
[UIImage imageNamed:#"3.gif"],
//etc...];
animatedMap.animationDuration = 20.0f;
animatedMap.animationRepeatCount = 0;
[animatedMap startAnimating];
Code that doesn't work:
animatedMap.animationImages = [NSArray arrayWithObjects:
[UIImage imageNamed:#"0.gif"],
[UIImage imageNamed:#"1.gif"],
[UIImage imageNamed:#"2.gif"],
[UIImage imageNamed:#"3.gif"],
//etc...];
animatedMap.animationDuration = 20.0f;
animatedMap.animationRepeatCount = 1;
[animatedMap startAnimating];
This just seems like really strange behaviour?
I noticed the same behavior, my solution was to put the start of animation code in a different place.
For me, it was a View Controller, so I put imageView.startAnimating() in viewWillAppear: instead of viewDidLoad:.
I don't 100% understand what is the problem, but one can assume that the animation doesn't fire because by setting the animationRepeatCount to 1, your "one animation" happens before the view is displayed. To be more technical, the CATransaction::Commit with the one animation gets performed before the view is displayed, and not when the view is displayed.
animationRepeatCount is used for cycle all the images in given animationDuration duration.
So if you provide animatedMap.animationRepeatCount = 1; that means only 1 cycle will be run and then the default set image will be displayed. If you didn't define default image to UIImageView then it will be blank(i.e. background color of UIImageView )
There is possibility to have more images then the given time duration for animation, which leads to super-fast animation.
Update 1
You can set last image just before starting your animation.
NSArray *imgArray = [NSArray arrayWithObjects:
[UIImage imageNamed:#"0.gif"],
[UIImage imageNamed:#"1.gif"],
[UIImage imageNamed:#"2.gif"],
[UIImage imageNamed:#"3.gif"],
//etc...];
[animatedMap setImage:[UIImage imageNamed:[imgArray lastObject]]];
animatedMap.animationImages = imgArray
animatedMap.animationDuration = 20.0f;
animatedMap.animationRepeatCount = 0;
[animatedMap startAnimating];
I have an ImageView that changes between 2 different images. When an event happens and it's in ImageView1, I want it to play a specific animation. And when an event happens and it's in ImageView2, I want it to play a specific, different animation. My code set up so far is essentially
if (ImageView1 == YES)
{
ImageView.animationImages = [NSArray arrayWithObjects:
[UIImage imageNamed:#"ImageAnimate1.png"],
[UIImage imageNamed:#"ImageAnimate2.png"],
[UIImage imageNamed:#"ImageAnimate3.png"],
[UIImage imageNamed:#"ImageAnimate4.png"], nil];
[ImageView setAnimationRepeatCount:1];
ImageView.animationDuration = 1;
[ImageView startAnimating];
}
else
{
ImageView.animationImages = [NSArray arrayWithObjects:
[UIImage imageNamed:#"ImageAnimate5.png"],
[UIImage imageNamed:#"ImageAnimate6.png"],
[UIImage imageNamed:#"ImageAnimate7.png"],
[UIImage imageNamed:#"ImageAnimate8.png"], nil];
[ImageView setAnimationRepeatCount:1];
ImageView.animationDuration = 1;
[ImageView startAnimating];
}
I'm aware it doesn't need to have 2 different sets of animation repeats and duration, but that was just the beginning in the event they change later.
The main problem is, the first set of animations only plays if i'm currently setting it to ImageView1. What I mean is, If i'm tapping/ touching the screen to the left it creates ImageView1, and if i'm tapping to the right it creates ImageView2. How can I change it from having to currently be tapping to the left to play that animation, to just playing the animation when the ImageView is currently displayed as such?
It might be as simple as setting it to the current UIImage, but i'm not exactly sure how to do it.
In other words, I would want to somehow write.
if (UIImage ImageViewLeft = YES)
ImageView.animationImages etc etc etc.
else ImageView.animationImages would be the second variation.
EDIT: I just changed it to
if (ImageView.image == [UIImage imageNamed:#"ImageLeft.png"])
{ code here
What happens is though now i cant change direction until another event happens. Essentially it will be stuck in either left or right until the event happens and then it correlates to the correct image then. .
A simple way would be to create a BOOL for imageIsRight. You set it to YES when you start playing an animation on the right, you set it to NO, when it goes left. Then create a timer which fires every .05 seconds (or whatever works). That timer can call a method which checks the BOOL you created and either repeats/continues the current animation or stops it and starts the other.
The above details may not be perfect for your scenario, which is a bit fuzzy to me, but the approach should get you where you need to be.
I am trying to set a UITableView background using the following method:
[self.tableView setBackgroundColor:[UIColor colorWithPatternImage:[UIImage imageNamed:#"backgroundImage.png"]]];
This works great for making the background scroll with the table. However, my background image fades into a solid color, so instead of the background repeating, I'd love for it to just scroll up and just fit to the screen height. Then I can set self.view's backgroundColor to be the solid color and it will look great.
Other options seem to be blitting a small image at the bottom, but this seems complicated and I didn't quite understand how to draw the background and blit using CGContext.
Can someone tell me how to do this?
I'm not sure whether this will work but you should try creating a resizeable UIImage for the background:
If you want the last line of pixels to repeat you would call the
- (UIImage *)resizableImageWithCapInsets:(UIEdgeInsets)capInsets resizingMode:(UIImageResizingMode)resizingMode
on your image ( [UIImage imageNamed:#"backgroundImage.png"] )
with edgeinsets: UIEdgeInsetsMake(backgroundImage.size.height-1,0,0,0)
and resizingMode: UIImageResizingModeStretch
the complete call would look like
UIImage* backgroundImage = [UIImage imageNamed:#"backgroundImage.png"];
UIImage* newBackgroundImage = [backgroundImage resizableImageWithCapInsets:UIEdgeInsetsMake(backgroundImage.size.height-1,0,0,0) resizingMode:UIImageResizingModeStretch];
And now you could try to use this image for the pattern creation:
[self.tableView setBackgroundColor:[UIColor colorWithPatternImage:newBackgroundImage]];
This worked for me:
UIImageView* bgImageView = [[UIImageView alloc] initWithFrame:self.tableView.frame];
bgImageView.image = [UIImage imageNamed:#"bg"];
bgImageView.contentMode = UIViewContentModeTop;
[self.tableView addSubview:bgImageView];
[self.tableView sendSubviewToBack:bgImageView];
In my case it worked fine. I didn't test it with a lot of cells which are reused. But it should work :D
I have made my animation like this （it's a group of images）
mainViewGIF.animationImages = [NSArray arrayWithObjects:
[UIImage imageNamed:#"test1.jpg"],
[UIImage imageNamed:#"test2.jpg"],
[UIImage imageNamed:#"test3.jpg"],
[UIImage imageNamed:#"test4.jpg"],nil];
mainViewGIF.animationDuration = 2.0;
mainViewGIF.animationRepeatCount = HUGE_VAL;
[mainViewGIF startAnimating];
[mainViewGIF release];
What I want is to insert a frame (by touching a button)to the animation and this frame play only once, just like "talking Tom"（the cat） when you touch him, he make some kind of action.
Or there is some other kinds of solution? thank u all
Have you tried using a NSMutableArray and when you press that specific button just:
[array addObject:[UIImage imageYouWant]];
Then after you finsish the animation try something like:
[array removeObjectAtIndex:5];
Not exactly sure about the syntax of the code, but I hope this pseudo code can help you out!
Best of luck
I couldn't find anything on how you can center the 'image' when you use (maybe you can't):
[self setBackgroundColor:[UIColor colorWithPatternImage:[UIImage imageNamed:#"background"]]];
Setting my [self setContentMode:UIContentModeCenter]; doesnt help.
Do I have to manually draw the image (either in drawRect or set the content of the CALayer? Which one if preferable?
I think you're on the wrong path here: you create a UIColor from a pattern (pattern already implies this is a repeating image). All in all- you can't have your pattern not repeat and centered.
If you just want simple image as background of your UIView, just add it as a subview and center it.
UIImage* img = [UIImage imageNamed:#"yourfile.png"];
UIImageView* imgView = [[UIImageView alloc]initWithImage: img];
[yourUIView addSubview: imgView];
imgView.center = CGPointMake(yourUIView.frame.size.width/2, yourUIView.frame.size.height/2);
Now - add more subviews to your "yourUIView" view and they'll show on top of the image - thus the image becoming the background.
So... no need to draw anything yourself.