I am trying to add a individual UiImageView for each item in an array this is what I have so far
_shapeArray = [NSArray arrayWithObjects:#"cloud.png",#"star.png", nil];
for (int i = 0; i < [_shapeArray count]; i++){
// I make a UIImage, which I will draw later
UIImage* image = [UIImage imageNamed:[NSString stringWithFormat:#"%#",[_shapeArray objectAtIndex:i]]];
UIImageView* blockView = [[UIImageView alloc] initWithImage:image];
blockView.frame = CGRectMake(arc4random()%320, arc4random()%460, image.size.width, image.size.height);
[self.view addSubview:blockView];
}
But as you can tell it just adds the last image in the array. I can not figure out a way to maybe add the array object number to the name of the UIImageView. Maybe I am going at it the wrong way, if so what would be the best way?
This code works, but you need to make sure of a couple of things:
- That the file name actually exists in your bundle (check for uppercase/lowercase), you would not get an error message if it didn't, but it would not show the picture
- That the image sizes are not too large and don't cover each other
You are adding the images in the same frame.
blockView.frame = CGRectMake(arc4random()%320+SomeXValue, arc4random()%460+SomeYvalue, image.size.width, image.size.height);
Related
I am trying to have an animation in which a mask is placed in the center of the view. Any image view that passes behind the mask appears. So here is my code so far, but the problem with this code is that it animates the mask with the image view.
UIView *maskView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.worldImageView.frame.size.height, self.worldImageView.frame.size.height)];
// ...position maskView...
maskView.layer.position = CGPointMake(CGRectGetMidX([self.view bounds]), CGRectGetMidY([self.view bounds]));
maskView.layer.backgroundColor = [UIColor blackColor].CGColor;
maskView.layer.cornerRadius = 90;
self.worldImage = [[UIImageView alloc] init];
self.worldImage.frame = self.worldImageView.frame;
self.worldImage.image = [UIImage imageNamed:#"continents.png"];
[maskView addSubview:self.worldImage];
[self.view addSubview:maskView];
CABasicAnimation* worldAnimation = [[CABasicAnimation alloc] init];
[worldAnimation setFromValue:[NSValue valueWithCGPoint:CGPointMake(self.view.frame.size.width + 50, CGRectGetMidY([maskView bounds]))]];
[worldAnimation setToValue:[NSValue valueWithCGPoint:CGPointMake(-50, CGRectGetMidY([maskView bounds]))]];
worldAnimation.keyPath = #"position";
worldAnimation.duration = 6.0f;
worldAnimation.repeatCount = HUGE_VALF;
[[self.worldImage layer] addAnimation:worldAnimation forKey:nil];
I don't know if I explained this well enough. Please tell me if you need more info. Thank you in advance!
Your issue here is that the mask property of UIView is attached to that UIView - they can't move separately. Technically, it's actually attached to the view's underlying layer, but whatever.
If you want the image to appear as if it's passing in front of a circular window (so that you can see it as it goes by) you'll need to add it as a subview of the view with the mask. So, you might do something like this:
UIView *maskView = [[UIView alloc] init];
// ...position maskView...
maskView.layer.cornerRadius = 90;
maskView.clipsToBounds = YES;
self.worldImage = [[UIImageView alloc] init];
self.worldImage.frame = self.worldImageView.frame;
self.worldImage.image = [UIImage imageNamed:#"continents.png"];
[maskView addSubview:self.worldImage];
[self.view addSubview:maskView];
// ...animate worldImage back and forth...
Note that instead of using a CAShapeLayer, I simply put rounded corners on maskView; since you want a circular mask, it's a much simpler trick. Also, when animating worldImage, consider using one of UIView's block-based animation methods – they're a lot easier to handle for simple stuff like this.
I need to split a big Image ( about 10000px Height ) in a number of smaller Images to use them as Textures for a OpenGL, below is the way I'm doing it right now, anybody got any ideas to do it faster, because it is taking quite long.
NSArray *images = [NSArray alloc] initWith
for (int i = 0; i<numberOfImages; i++){
int t = i*origHeight;
CGRect fromRect = CGRectMake(0, t, origWidth, origHeight); // or whatever rectangle
CGImageRef drawImage = CGImageCreateWithImageInRect(sourceImage.CGImage, fromRect);
UIImage *newImage = [UIImage imageWithData:UIImageJPEGRepresentation([UIImage imageWithCGImage:drawImage],1.0)];
[images addObject:newImage];
CGImageRelease(drawImage);
}
You can pre-split them before ie using the convert command with ImageMagick which you can get with brew
http://www.imagemagick.org/discourse-server/viewtopic.php?f=1&t=15771
i have this method i use to load many images to scroll view, but when the images load from the url my scroll view is stuck and i can't understand how to load them in the background so the user will not feel it.
this method will call few times (8) in "for" cycle.
- (void)loadPhotosToLeftscroll{
//getting image information from JSON
NSMutableDictionary *photoDict;
photoDict = [leftPhotoArray lastObject];
//getting the photo
NSString *photoPath = [photoDict objectForKey:#"photos_path"];
NSLog(#"photo Path:%#",photoPath);
NSData * imageData = [[NSData alloc] initWithContentsOfURL:[NSURL URLWithString:photoPath]];
UIImage *image = [UIImage imageWithData:imageData];
// use the image how you like, say, as your button background
//calculating the hight of next photo
UIImageView *leftImage = [leftBlockScroll.subviews lastObject];
//allocating photoView
UIImageView *photoView = [[UIImageView alloc]initWithFrame:CGRectMake(5 , leftImage.frame.origin.y + leftImage.frame.size.height+5, image.size.width/2, image.size.height/2 )];
photoView.userInteractionEnabled=YES;
[photoView.layer setMasksToBounds:YES];
[photoView.layer setCornerRadius:3];
//getting items list
NSDictionary *sh_items = [photoDict objectForKey:#"items"];
//adding image button
UIButton *imageOverButton = [UIButton buttonWithType:UIButtonTypeCustom];
imageOverButton.frame = CGRectMake(0, 0, photoView.frame.size.width, photoView.frame.size.height);
[imageOverButton addTarget:self action:#selector(LeftimagePressed:) forControlEvents:UIControlEventTouchUpInside];
[imageOverButton setTag:[leftPhotoArray count]-1];
[photoView addSubview:imageOverButton];
//adding sh button to imageView
[self addThe_sh_signs:sh_items To_ImageView:photoView];
//subViewing the image to the scrollView
[self insert_Image:image toImageView:photoView in_Scroll:leftBlockScroll];
//calclulating the position of next imageView in scroll.
nextLeftPhotoHight = photoView.frame.size.height + photoView.frame.origin.y + 5;
//calculating the hight of the highest scroll view in both.
leftBlockScroll.contentSize = CGSizeMake(160, [self theSizeOfScrollViewHight]);
rightBlocScroll.contentSize = CGSizeMake(160, [self theSizeOfScrollViewHight]);
isLoadindContant = NO;
[self.view reloadInputViews];
[leftBlockScroll reloadInputViews];
}
please do not send me to some link that trying to explain how to use the asynchronous.
Try to explain according the method you see here.
Im here for any question, that you need to ask to help me.
You will have to do it asynchronously in a proper way. I do not think there is any way around that. I subclassed an UIImageView object and placed many instances of it within the cells of a talbe (in your case within the scroll view). The subclass objects are initialized with an url and load their image asynchronously (with some caching so that the image is not loaded every time).
This tutorial helped me much in the beginning:
http://www.markj.net/iphone-asynchronous-table-image/
You will just have to adopt that to your scroll view. The underlaying principle remains the same.
So I have run into a fairly complex problem with my application.
I have about 40 UIImageView objects that need to be displayed at different locations when different ones are stacked (EX img 1 needs to take img 2 place if img2 ==NO).
What I am trying to do is use a "for loop" and run through all my Boolean values that check if the image is selected.
I was curious if it is at all possible to call variable like this
-(IBAction) button:(id) sender{
scrollView.hidden = YES;
NSInteger i = 1;
(#"imagenumber%d", i) = [[UIImageView alloc] initWithFrame: CGRectMake (28, 230, 86, 26)];
[[imagenumber(#"%d", i)] setImage:[UIImage imageNamed:#"csa.jpg"]];
[self.view addSubview: [imagenumber(#"%d", i)]];}
}
where #"imagenumber%d" is my NSImageView and i is a number ranging from 1-40.
I'm sorry if this is confusing, I really would appreciate any help at all on the subject because I can’t seem to get any idea and have been working on this problem for several weeks.
Put the views in a NSMutableArray - you can access elements in those by index, use fast enumeration, ... E.g.:
UIImageView *image = [[UIImageView alloc] ...
[myMutableArray addObject:image];
// ...
For the sake of hilarity you could also put them in a intrinsic array and use pointer arithmetic. (Which is probably what happens behind the scenes with faster enumeration for those interested)
UIImageView * imageArray[40];
...
for(UIImageView * this = imageArray; this; this++)
{
this = [[UIImageView alloc] initWithFrame: CGRectMake (28, 230, 86, 26)];
...
}
In my app i am sending certain number of images from my device to other device.I achieved all this .Now what i want is that when i send only 1 image to other device ,then the frame of the image view should be the full screen.If i send 2 images then the frame should be like this;-2 images covering the whole scree.So the frame should change dynamically according to the number of images sent.Currently i am using table view to display the received images .What other option could be the best to achieve my target.Please help .Anyone done this type of work before ,please i need your help.
Thanks,
Daisy
You can do something like this:
CGFloat screenWidth = 320.0;
CGFloat screenHeight = 460.0;
NSArray imageNames = [NSArray arrayWithObjects:#"Picture1.png", #"Picture2.png", nil];
NSInteger numberOfImages = [imageNames size];
for (NSInteger j = 0; j < numberOfImages; ++j)
{
UIImageView *image = [[UIImageView alloc] initWithImage:[UIImage imageNamed:[imageNames objectAtIndex:j]]];
[image setFrame:CGRectMake(0.0, screenHeight / (CGFloat)numberOfImages * (CGFloat)j, screenWidth, screenHeight / (CGFloat)numberOfImages)];
[self addSubview:image];
[image release];
}
This example lists the images vertically. When you want also a horizontal list, then you have to use maths.
The code is not tested.