In my game I'm rotating UIImageview to 30-degrees and I need to get transformed CGRect of rotated UIImageview, please some one help me with sample code.
UIImageView *mainImgB = [[UIImageView alloc]initWithFrame:CGRectMake(0, 0, width, hight)];
[mainImgB setBackgroundColor:[UIColor greenColor]];
mainImgB.layer.anchorPoint = CGPointMake(0, 0);
mainImgB.center = CGPointMake(View.frame.size.width/2, View.frame.size.height/2);
mainImgB.transform = CGAffineTransformRotate(mainImgB.transform,30 * M_PI/180);
Thanks
Use CGRectApplyAffineTransform :
CGRect newRect = CGRectApplyAffineTransform(yourViewOnWhichTransformGetsApplied.frame, yourTransformHere);
Related
i want to display some images on album cover on my app like bellow image.
EDIT:-
i want to display this view in UICollectionViewCell and collectionView scrollDirection Horizontal with paging enabled.
any help will be appreciated. and thanks in advance.
I do not know if you understand the question correctly.
If you want to do what I see on the picture, so try this:
UIView *cover = [[UIView alloc] initWithFrame:CGRectMake(100, 100, 500, 500)];
cover.backgroundColor = [UIColor blueColor];
int width = 200;
int height = 350;
int posx = 100;
int posy = 50;
for (int i = 0; i < 10; i++) {
//craete images
UIView *imagebg = [[UIView alloc] initWithFrame:CGRectMake(posx + arc4random_uniform(20), posy + arc4random_uniform(20), width, height)];
imagebg.backgroundColor = [UIColor whiteColor];
UIImageView *image = [[UIImageView alloc] initWithFrame:CGRectMake(20, 20, width - 40, height - 50)];
image.image = [UIImage imageNamed:#"loading-screen.png"];
[imagebg addSubview:image];
//rotate
double rads = arc4random_uniform(100)/10;
CGAffineTransform transform = CGAffineTransformRotate(imagebg.transform, rads);
imagebg.transform = transform;
//add as subview
[cover addSubview:imagebg];
}
[self.view addSubview:cover];
I'm trying to create a custom view which containes several images. I do that by adding them programmatically. The problem is that those subviews overlap each other and I can't find the way to change that. The only solution I can see is doing something like setting frames for each new image programmatically. I would be grateful if someone could tell me what is the best way to solve this issue.
for (id image in self.images) {
UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
[self.imageViews addObject:imageView];
[self addSubview:imageView];
}
If you wanna make your customView like UICollectionView you need a UIScrollView and add your subviews in it. Everytime when you add a subview change frame location so it could be something like this:
int xPosition = 0;
int yPosition =0;
for (id image in self.images) {
if (xPosition>self.view.frame.size.width) {
//give size to every imageView and every time in loop change the location
UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(xPosition, yPosition, 50, 50)];
imageView.image = image;
yPosition = yPosition + 50;
[self.view addSubView:imageView];
}
else {
UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(xPosition, yPosition, 50, 50)];
imageView.image = image;
xPosition = xPosition + 50;
[self.view addSubView:imageView];
}
}
Without using Interface Builder your only real options are to change the frame or the center.
imageView.frame = CGRectMake(x coord, y coord, width, height);
This method lets you resize and move whereas changing the center lets you do just that, move the center of the view.
or
imageView.center = CGPointMake(x coord, y coord);
Or as recommended add constraints.
Say, I have a UIImageView or any object and I set it in a UIView as subView with CGRectMake like this:
UIView *headerView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, 30)];
UIImageView *imgView = [[UIImageView alloc]initWithFrame:CGRectMake(266, 0, 30, 30)];
[imgView setImage:[UIImage imageNamed:[self.imageDicKey objectAtIndex:section]]];
[headerView addSubview:imgView];
Here I set the position of my imgView like CGRectMake(266, 0, 30, 30)]; and it counts it's position form the left x position (which is 266). What If I want to set my imgView's position from right side of the screen? So that,in different width of iPhone screen it shows in a same ratio position. But which will be counted it's position from right edge.
Thanks a lot in advanced.
I would recommend not hard coding the exact positions and instead calculating the x and y. That way it will help for different sized screens so it's not an exact position and rather it's based upon the views' size.
UIView *headerView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, 30)];
CGFloat padding = 20; // amount for padding
CGSize size = CGSizeMake(30, 30); // size of imageView
CGPoint startPos = CGPointMake(headerView.frame.size.width - padding - size.width, 0); // starting position for imageView
UIImageView *imgView = [[UIImageView alloc]initWithFrame:CGRectMake(startPos.x, startPos.y, size.width, size.height)]; [imgView setImage:[UIImage imageNamed:[self.imageDicKey objectAtIndex:section]]]; [headerView addSubview:imgView];
Well, since the ImageView's width is 30 and the x coordinate is 266 from the left side, it makes the x coordinate from the right side 296.
I'm working on an iPad app and part of the UI is a scrollview that has buttons for its contents. I'm working on adding images to these buttons, but when I do so, I only ever get the image in one spot, when I should be seeing it on all the buttons. This is what I'm doing:
float scrollCurrTop = 0;
CGRect currProcedureButtonFrame = CGRectMake(0,
scrollCurrTop,
self.fProceduresView.frame.size.width,
self.fLabelAndButtonHeight);
PatientIDButton* currProcedureButton = [PatientIDButton buttonWithType:UIButtonTypeCustom];
[currProcedureButton setFrame:currProcedureButtonFrame];
[currProcedureButton.layer setBorderColor: [self.fPanelViewBorderColor CGColor]];
[currProcedureButton.layer setBorderWidth: self.fBorderWidth];
currProcedureButton.titleLabel.font = self.fLabelFont;
NSString* displayName = [grabbing name];
if (displayName == nil)
{
displayName = currPlanName;
}
[currProcedureButton setTitle:displayName
forState:UIControlStateNormal];
[currProcedureButton setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
currProcedureButton.contentHorizontalAlignment = UIControlContentHorizontalAlignmentCenter;
currProcedureButton.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;
// is the plan approved?
if ([self isPlanApproved:currPlanName])
{
// add the checkmark to this plan button
CGRect currPlanButtonFrame = currProcedureButton.frame;
float originX = currPlanButtonFrame.size.width - (currPlanButtonFrame.size.width/3.0f);
float originY = currPlanButtonFrame.origin.y;
float width = currPlanButtonFrame.size.width - originX;
float height = currPlanButtonFrame.size.height;
CGRect currPlanApprovalImageFrame = CGRectMake(originX, originY, width, height);
UIImageView* currPlanApprovalImage = [[UIImageView alloc] initWithFrame:currPlanApprovalImageFrame];
[currPlanApprovalImage setBackgroundColor:[UIColor colorWithRed:(63.0f/255.0f)
green:(179.0f/255.0f)
blue:(79.0f/255.0f)
alpha:1.0f]];
[currPlanApprovalImage setImage:self.fCheckMarkIcon];
[currProcedureButton addSubview:currPlanApprovalImage];
}
[self.fProceduresView addSubview:currProcedureButton];
scrollCurrTop += self.fLabelAndButtonHeight;
Where 'fProceduresView' is the scrollview that houses the buttons. What am I doing wrong?
It seems that you're misunderstanding the logic behing setting the frame of the imageview's those you're trying to add
CGRect currPlanButtonFrame = currProcedureButton.frame;
float originX = currPlanButtonFrame.size.width - (currPlanButtonFrame.size.width/3.0f);
float originY = currPlanButtonFrame.origin.y;
float width = currPlanButtonFrame.size.width - originX;
float height = currPlanButtonFrame.size.height;
CGRect currPlanApprovalImageFrame = CGRectMake(originX, originY, width, height);
UIImageView* currPlanApprovalImage = [[UIImageView alloc] initWithFrame:currPlanApprovalImageFrame];
You don't need to set originY to currPlanButtonFrame.origin.y;
All subviews have relative coordinates to their's superviews.
So in your case originY should be 0
For example:
// Image is visible
Button frame [0, 0, 100, 100]
image in button [0, 0, 100, 100]
// Button is visible, but image is not because it will be clipped by bounds of the button.
Button frame [100, 100, 100, 100]
image in button [100, 100, 100, 100]
Also you will be able to "see" your images, if you set
currProcedureButton.clipsToBounds = NO
i have a problem when i'm trying to add subviews to a UIScrollView on viewDidLoad.
I'm using this code to programmatically add the UIImageViews to the scrollView:
- (void)viewDidLoad {
[super viewDidLoad];
NSInteger const_width = 100;
NSInteger numberOfViews = 4;
CGRect theFrame = [self.scrollView frame];
for (int i = 0; i < numberOfViews; i++) {
CGFloat xOrigin = i * const_width;
UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(xOrigin,theFrame.origin.y,const_width,110)];
UIImage *image = [UIImage imageNamed:#"cocoloco.jpg"];
[imageView setImage:image];
//[self.scrollView addSubview:imageView];
imageView.tag = i;
CGRect rect = imageView.frame;
rect.size.height = 110;
rect.size.width = 110;
imageView.frame = rect;
[self.scrollView addSubview:imageView];
}
self.scrollView.contentSize = CGSizeMake(const_width * numberOfViews, 110);}
But i get the current view:
It seems that the scroll view frame takes its position regardless the 3 yellow tabs (that are a special TabBarController) so i get a wrong frame origin from the UIScrollView and therefore the UIImageViews are wrong positioned.
Any idea?
I don't know exactly how to do it, but add the height of the frame to the "Y" position of your rectangle. Something like this:
UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(xOrigin,theFrame.origin.y + (theFrame.height),const_width,110)];
To get the scrollview below the navigation bar at the top, try
self.scrollview.autoresizingMask = UIViewAutoresizingFlexibleTopMargin;
Then position the table below the scrollview by setting it's origin base on the scrollview origin and height:
CGRect frame = tableView.frame;
frame.origin.y = self.scrollview.frame.origin.y + self.scrollview.frame.size.height;
tableView.frame = frame;
You should move any resizing or layout of your UI to the -(void)layoutSubviews method and this should sort your problem correctly.