Zoom issue with UIImageView - iphone

Question

I am trying to get pinch/zoom work but to no luck... please check code attached any help is appreciated.
#import "SlideShowViewController.h"
#import "SomAppDelegate.h"
#import "MainCategory.h"
#import <sqlite3.h>
#import "UIImage+Resizing.h"
NSInteger Val;
NSInteger AIX;
NSInteger AIY;
NSInteger Height;
NSInteger Pre;
NSInteger Valtab;
NSInteger ImageVal;
NSInteger ValScroll;
UIToolbar *tabBar;
UIActivityIndicatorView *activityIndicator;
UIActivityIndicatorView *activityIndicator1;
#class SomAppDelegate;
#class SlideShowViewController;
#interface SlideShowView : UIView<UIScrollViewDelegate>
{
NSArray * mImages;
UIImageView * mLeftImageView;
UIImageView * mCurrentImageView;
UIImageView * mRightImageView;
NSUInteger mCurrentImage;
BOOL mSwiping;
UIImageView * result;
NSString *imageName;
CGFloat mSwipeStart;
UIScrollView *NewView;
NSTimer *timer;
//////////////////////////////////////////////////////for pinch and Zoom//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
CGPoint gestureStartPoint;
CGPoint wmsImageViewCenter;
double unitDistance;
double initialDistance;
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
}
#property (nonatomic, retain)UIView *NewView;
- (double)getDistance:(CGPoint)fromPoint toPoint:(CGPoint)otherPoint;
-(id)initWithImages:(NSArray *)inImages;
#end
#interface SlideShowView(PrivateMethods)
-(UIImageView *)newPieceViewWithImageNamed:(NSString *)imageName atPostion:(CGPoint)centerPoint;
- (void)animateFirstTouch:(double)scale;
#end
#pragma mark -
#implementation SlideShowView
#synthesize NewView;
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
- (UIImageView *)createImageView:(NSUInteger)inImageIndex
{
if (inImageIndex >= [mImages count])
{
return nil;
}
UIImage *pigImage1 =[UIImage imageWithContentsOfFile:[mImages objectAtIndex:inImageIndex]];
result=[[UIImageView alloc] initWithImage:pigImage1];
pigImage1=nil;
[pigImage1 release];
result.opaque = YES;
CGRect frameRect = [result frame];
unitDistance = [self getDistance:CGPointMake(0, 0) toPoint:CGPointMake(frameRect.size.width, frameRect.size.height)] / 4.0;
result.userInteractionEnabled =NO;
result.alpha = 1.0;
result.backgroundColor = [UIColor blackColor];
result.contentMode = UIViewContentModeScaleAspectFit;
result.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
return result;
}
-(UIImage*)createImage:(NSUInteger)inImageIndex
{
if (inImageIndex >= [mImages count])
{
return nil;
}
UIImage *pigImage1 =[UIImage imageWithContentsOfFile:[mImages objectAtIndex:inImageIndex]];
return pigImage1;
}
- (id)initWithImages:(NSArray *)inImages
{
initialDistance = 1;
unitDistance = 1;
[self setMultipleTouchEnabled:YES];
self.multipleTouchEnabled = YES;
if (self = [super initWithFrame:CGRectZero])
{
mImages = [inImages retain];
NSUInteger imageCount=[inImages count];
ImageVal=imageCount;
if (imageCount > 0)
{
mCurrentImageView = [self createImageView:0];
[self addSubview:mCurrentImageView];
result=nil;
if (imageCount > 1)
{
mRightImageView = [self createImageView:1];
[self addSubview:mRightImageView];
result=nil;
}
}
self.opaque = YES;
self.backgroundColor = [UIColor blackColor];
self.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
}
return self;
}
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
- (void)dealloc
{
[mImages release];
[result release];
result.image=nil;
result=nil;
[super dealloc];
}
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
- (void)layoutSubviews
{
if (mSwiping)
return;
CGSize contentSize =self.frame.size; //self.frame.size;
mLeftImageView.frame = CGRectMake(-contentSize.width, 0.0f, contentSize.width, contentSize.height);
mCurrentImageView.frame = CGRectMake(0.0f,0.0f, contentSize.width, contentSize.height);
mRightImageView.frame = CGRectMake(contentSize.width, 0.0f, contentSize.width, contentSize.height);
}
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
//////////////////////////////////////////// code by pinch and zoom ////////////////////////////////////////////////////////////////
if (mCurrentImageView != nil)
{
if ([touches count] > 1) {
NSArray *touchArray = [touches allObjects];
CGPoint p1 = [[touchArray objectAtIndex:0] locationInView:self];
CGPoint p2 = [[touchArray objectAtIndex:1] locationInView:self];
initialDistance = [self getDistance:p1 toPoint:p2];
}
else
{
UITouch *touch = [touches anyObject];
gestureStartPoint = [touch locationInView:self];
wmsImageViewCenter = mCurrentImageView.center;
}
}
//////////////////////////////////////// code by rajeev ////////////////////////////////////////////////////////////////
if ([touches count] != 1)
return;
mSwipeStart = [[touches anyObject] locationInView:self].x;
mSwiping = YES;
mLeftImageView.hidden = NO;
mCurrentImageView.hidden = NO;
mRightImageView.hidden = NO;
}
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
CGSize contentSize =self.frame.size;
///////////////////////////////////////////////////for pinch and zoom/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
if (mCurrentImageView != nil)
{
if ([touches count] > 1)
{
NSArray *touchArray = [touches allObjects];
CGPoint p1 = [[touchArray objectAtIndex:0] locationInView:self];
CGPoint p2 = [[touchArray objectAtIndex:1] locationInView:self];
float distanceNew = [self getDistance:p1 toPoint:p2];
float dx = (distanceNew - initialDistance)/unitDistance;
double scale = fabs(mCurrentImageView.transform.a + dx);
[self animateFirstTouch:scale];
initialDistance = distanceNew;
}
else if([touches count]==1)
{
UITouch *touch = [touches anyObject];
CGPoint currentPosition = [touch locationInView:self];
CGFloat deltaX = gestureStartPoint.x - currentPosition.x;
CGFloat deltaY = gestureStartPoint.y - currentPosition.y;
mCurrentImageView.center = CGPointMake(wmsImageViewCenter.x - deltaX, wmsImageViewCenter.y - deltaY);
mCurrentImageView.opaque = YES;
mCurrentImageView.contentMode = UIViewContentModeScaleAspectFit;
mCurrentImageView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
}
}
//////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
CGRect frameRect = [mCurrentImageView frame];
if(frameRect.size.height>Height)
{
contentSize.width=frameRect.size.width;
contentSize.height= frameRect.size.height;
mLeftImageView.frame = CGRectMake(-contentSize.width, 0.0f, contentSize.width, contentSize.height);
mRightImageView.frame = CGRectMake(contentSize.width, 0.0f, contentSize.width, contentSize.height);
}
else
{
if (! mSwiping || [touches count] != 1)
return;
CGFloat swipeDistance = [[touches anyObject] locationInView:self].x - mSwipeStart;
mLeftImageView.frame = CGRectMake(swipeDistance - contentSize.width, 0.0f, contentSize.width, contentSize.height);
mCurrentImageView.frame = CGRectMake(swipeDistance,0.0f, contentSize.width, contentSize.height);
mRightImageView.frame = CGRectMake(swipeDistance + contentSize.width, 0.0f, contentSize.width, contentSize.height);
}
}
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
if (! mSwiping)
return;
CGSize contentSize = self.frame.size;
NSUInteger count = [mImages count];
CGFloat swipeDistance = [[touches anyObject] locationInView:self].x - mSwipeStart;
CGRect frameRect = [mCurrentImageView frame];
if(frameRect.size.height>Height)
{
if (mCurrentImage > 0 && swipeDistance > 250.0f)
{
[mRightImageView removeFromSuperview];
mRightImageView.image=nil;
mRightImageView=nil;
result.image=nil;
result=nil;
mRightImageView = mCurrentImageView;
mCurrentImageView = mLeftImageView;
mCurrentImage--;
if (mCurrentImage > 0)
{
mLeftImageView = [self createImageView:mCurrentImage - 1];
mLeftImageView.hidden = YES;
[self addSubview:mLeftImageView];
result=nil;
}
else
{
mLeftImageView = nil;
result=nil;
}
[UIView beginAnimations:#"swipe" context:NULL];
[UIView setAnimationCurve:UIViewAnimationCurveEaseOut];
[UIView setAnimationDuration:0.3f];
CGSize contentSize = self.frame.size;
mLeftImageView.frame = CGRectMake(-contentSize.width, 0.0f, contentSize.width, contentSize.height);
mCurrentImageView.frame = CGRectMake(0.0f,0.0f, contentSize.width, contentSize.height);
mRightImageView.frame = CGRectMake(contentSize.width, 0.0f, contentSize.width, contentSize.height);
[UIView commitAnimations];
mSwiping = NO;
}
//////////////////////////////////////////////////////////right Swaping ///////////////////////////////////////////////////////////////////////
else if (mCurrentImage < count - 1 && swipeDistance < -250.0f)
{
[mLeftImageView removeFromSuperview];
mLeftImageView.image=nil;
mLeftImageView=nil;
result.image=nil;
result=nil;
mLeftImageView = mCurrentImageView;
mCurrentImageView = mRightImageView;
mCurrentImage++;
if (mCurrentImage < count - 1)
{
mRightImageView = [self createImageView:mCurrentImage + 1];
mRightImageView.hidden = YES;
[self addSubview:mRightImageView];
result=nil;
}
else
{
mRightImageView=nil;
result=nil;
}
[UIView beginAnimations:#"swipe" context:NULL];
[UIView setAnimationCurve:UIViewAnimationCurveEaseOut];
[UIView setAnimationDuration:0.3f];
CGSize contentSize = self.frame.size;
mLeftImageView.frame = CGRectMake(-contentSize.width, 0.0f, contentSize.width, contentSize.height);
mCurrentImageView.frame = CGRectMake(0.0f,0.0f, contentSize.width, contentSize.height);
mRightImageView.frame = CGRectMake(contentSize.width, 0.0f, contentSize.width, contentSize.height);
[UIView commitAnimations];
mSwiping = NO;
}
}
else
{
///////////////////////////////////////////////////// Left swaping////////////////////////////////////////////////////////////////////////////
if (mCurrentImage > 0 && swipeDistance > 50.0f)
{
[mRightImageView removeFromSuperview];
mRightImageView.image=nil;
mRightImageView=nil;
result.image=nil;
result=nil;
mRightImageView = mCurrentImageView;
mCurrentImageView = mLeftImageView;
mCurrentImage--;
if (mCurrentImage > 0)
{
mLeftImageView = [self createImageView:mCurrentImage - 1];
mLeftImageView.hidden = YES;
[self addSubview:mLeftImageView];
result=nil;
}
else
{
mLeftImageView = nil;
result=nil;
}
}
//////////////////////////////////////////////////////////right Swaping ///////////////////////////////////////////////////////////////////////
else if (mCurrentImage < count - 1 && swipeDistance < -50.0f)
{
[mLeftImageView removeFromSuperview];
mLeftImageView.image=nil;
mLeftImageView=nil;
result.image=nil;
result=nil;
mLeftImageView = mCurrentImageView;
mCurrentImageView = mRightImageView;
mCurrentImage++;
if (mCurrentImage < count - 1)
{
mRightImageView = [self createImageView:mCurrentImage + 1];
mRightImageView.hidden = YES;
[self addSubview:mRightImageView];
result=nil;
}
else
{
mRightImageView=nil;
result=nil;
}
}
[UIView beginAnimations:#"swipe" context:NULL];
[UIView setAnimationCurve:UIViewAnimationCurveEaseOut];
[UIView setAnimationDuration:0.3f];
mLeftImageView.frame = CGRectMake(-contentSize.width, 0.0f, contentSize.width, contentSize.height);
mCurrentImageView.frame = CGRectMake(0.0f,0.0f, contentSize.width, contentSize.height);
mRightImageView.frame = CGRectMake(contentSize.width, 0.0f, contentSize.width, contentSize.height);
[UIView commitAnimations];
mSwiping = NO;
}
}
///////////////////////////////////////////////////////////////////////////////////Tab Bar functionality /////////////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
#pragma mark -
#pragma mark === Animating subviews ===
#pragma mark
- (void)animateFirstTouch:(double)scale
{
if (mCurrentImageView != nil)
{
CGAffineTransform transform = CGAffineTransformMakeScale(scale, scale);
mCurrentImageView.transform = transform;
/*
CGSize contentSize = self.frame.size;
if(contentSize.width>1024)
{
//contentSize= CGSizeMake(1024, 1024);
mCurrentImageView.opaque = YES;
mCurrentImageView.contentMode = UIViewContentModeScaleAspectFit;
mCurrentImageView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
mCurrentImageView.clipsToBounds = YES;
//mCurrentImageView.frame = self.bounds;
[mCurrentImageView setNeedsLayout];
}
*/
}
}
- (double)getDistance:(CGPoint)fromPoint toPoint:(CGPoint)otherPoint
{
double deltaX = otherPoint.x - fromPoint.x;
double deltaY = otherPoint.y - fromPoint.y;
return sqrt(pow(deltaX, 2) + pow(deltaY, 2));
}
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
#end
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// SlideShowView
#implementation SlideShowViewController
#synthesize Values,PreVal;
#synthesize ImageID,ImagePath,ImagePos,CatID,SlideID,CID;
/*
// The designated initializer. Override if you create the controller programmatically and want to perform customization that is not appropriate for viewDidLoad.
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
if ((self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil])) {
// Custom initialization
}
return self;
}
*/
/*
// Implement loadView to create a view hierarchy programmatically, without using a nib.
- (void)loadView {
}
*/
- (void)viewDidLoad
{
[super viewDidLoad];
self.navigationController.navigationBar.barStyle = UIBarStyleBlackTranslucent;
}
- (void)viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
}
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
int counter=0;
ImageID=[[NSMutableArray alloc]init];
ImagePath=[[NSMutableArray alloc]init];
ImagePos=[[NSMutableArray alloc] init];
CatID=[[NSMutableArray alloc] init];
SlideID=[[NSMutableArray alloc] init];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *writablePath = [documentsDirectory stringByAppendingPathComponent:#"Category.sqlite3"];
sqlite3 *db;
if (sqlite3_open([writablePath UTF8String], &db) == SQLITE_OK)
{
sqlite3_stmt *statement = nil;
NSString *insertQuery=[NSString stringWithFormat:#"select *from Image where SlideID=%d and CatID=%d;",Values,CID];
const char *sql = [insertQuery cStringUsingEncoding:NSASCIIStringEncoding];
if(sqlite3_prepare_v2(db, sql, -1, &statement, NULL) != SQLITE_OK)
{
NSAssert1(0,#"error1",sqlite3_errmsg(db));
}
else
{
while(sqlite3_step(statement) == SQLITE_ROW)
{
counter++;
[ImageID addObject:[NSString stringWithFormat:#"%s",(char *)sqlite3_column_text(statement,0)]];
[ImagePath addObject:[NSString stringWithFormat:#"%s",(char *)sqlite3_column_text(statement,1)]];
[ImagePos addObject:[NSString stringWithFormat:#"%s",(char *)sqlite3_column_text(statement,2)]];
[CatID addObject:[NSString stringWithFormat:#"%s",(char *)sqlite3_column_text(statement,3)]];
[SlideID addObject:[NSString stringWithFormat:#"%s",(char *)sqlite3_column_text(statement,4)]];
}
sqlite3_finalize(statement);
}
}
sqlite3_close(db);
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
Slide= [[[SlideShowView alloc] initWithImages:ImagePath] autorelease];
self.view=Slide;
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
tabBar.alpha = 0.0;
if (interfaceOrientation == UIInterfaceOrientationLandscapeLeft)
{ AIX=510;
AIY=360;
Valtab=690;
ValScroll=730.0;
Height=1008;
}
else if(interfaceOrientation == UIInterfaceOrientationLandscapeRight)
{
AIX=510;
AIY=360;
Valtab=690;
ValScroll=730.0;
Height=750;
}
else if(interfaceOrientation == UIInterfaceOrientationPortrait)
{
AIX=360;
AIY=510;
Valtab=945;
ValScroll=530;
Height=1008;
}
else
{
AIX=360;
AIY=510;
Valtab=945;
ValScroll=530.0;
Height=750;
}
return YES; //(interfaceOrientation == UIInterfaceOrientationLandscapeLeft);
}
- (void)didReceiveMemoryWarning {
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Release any cached data, images, etc that aren't in use.
}
- (void)viewDidUnload {
[super viewDidUnload];
// Release any retained subviews of the main view.
}
- (void)dealloc {
[super dealloc];
[activityIndicator release];
}
#end

Answer 1

Try rearranging your init method a little:
- (id)initWithImages:(NSArray *)inImages
{
initialDistance = 1;
unitDistance = 1;
// remove these
// [self setMultipleTouchEnabled:YES];
// self.multipleTouchEnabled = YES;
if (self = [super initWithFrame:CGRectZero])
{
mImages = [inImages retain];
NSUInteger imageCount=[inImages count];
ImageVal=imageCount;
if (imageCount > 0)
{
mCurrentImageView = [self createImageView:0];
[self addSubview:mCurrentImageView];
result=nil;
if (imageCount > 1)
{
mRightImageView = [self createImageView:1];
[self addSubview:mRightImageView];
result=nil;
}
}
self.opaque = YES;
self.backgroundColor = [UIColor blackColor];
self.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
// move to here after the init on super is done
self.multipleTouchEnabled = YES;
}
return self;
}
Calling init on the super probably undoes your efforts to set it beforehand.