У меня проблема с моим приложением. С помощью учебника я создал слайд-шоу с картинками. Я добавил панель инструментов, чтобы можно было вернуться назад. Проблема в том, что когда показываются картинки, панель инструментов исчезает. Я пытался погуглить проблему и так далее, но я не могу ее решить. В «предыдущем» классе я создаю SlideShowViewController, а внутри этого класса у меня есть еще один, называемый SlideShowView. Я надеюсь, что это не грязно или глупо, потому что мне действительно нужна помощь.
Вот код:
#import "SlideShowViewController.h"
#import "Pictures.h"
@interface SlideShowView : UIView
{
NSArray * mImages;
UIImageView * mLeftImageView;
UIImageView * mCurrentImageView;
UIImageView * mRightImageView;
NSUInteger mCurrentImage;
Pictures *picRef;
SlideShowViewController *slideRef;
BOOL mSwiping;
CGFloat mSwipeStart;
}
- (id)initWithImages:(NSArray *)inImages;
@end // SlideShowView
#pragma mark -
//#import "SlideShowViewController.h"
@implementation SlideShowView
- (UIImageView *)createImageView:(NSUInteger)inImageIndex
{
if (inImageIndex >= [mImages count])
{
return nil;
}
UIImageView * result = [[UIImageView alloc] initWithImage:[mImages objectAtIndex:inImageIndex]];
result.opaque = YES;
result.userInteractionEnabled = NO;
result.backgroundColor = [UIColor whiteColor];
result.contentMode = UIViewContentModeScaleAspectFit;
result.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
return result;
}
- (id)initWithImages:(NSArray *)inImages
{
if (self = [super initWithFrame:CGRectZero])
{
mImages = [inImages retain];
NSUInteger imageCount = [inImages count];
if (imageCount > 0)
{
mCurrentImageView = [self createImageView:0];
[self addSubview:mCurrentImageView];
if (imageCount > 1)
{
mRightImageView = [self createImageView:1];
[self addSubview:mRightImageView];
}
}
self.opaque = YES;
self.backgroundColor = [UIColor whiteColor];
self.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
}
return self;
}
- (void)dealloc
{
[mImages release];
[super dealloc];
}
- (void)layoutSubviews
{
if (mSwiping)
return;
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);
}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
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
{
if (! mSwiping || [touches count] != 1)
return;
CGFloat swipeDistance = [[touches anyObject] locationInView:self].x - mSwipeStart;
CGSize contentSize = self.frame.size;
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;
if (mCurrentImage > 0 && swipeDistance > 50.0f)
{
[mRightImageView removeFromSuperview];
[mRightImageView release];
mRightImageView = mCurrentImageView;
mCurrentImageView = mLeftImageView;
mCurrentImage--;
if (mCurrentImage > 0)
{
mLeftImageView = [self createImageView:mCurrentImage - 1];
mLeftImageView.hidden = YES;
[self addSubview:mLeftImageView];
}
else
{
mLeftImageView = nil;
}
}
else if (mCurrentImage < count - 1 && swipeDistance < -50.0f)
{
[mLeftImageView removeFromSuperview];
[mLeftImageView release];
mLeftImageView = mCurrentImageView;
mCurrentImageView = mRightImageView;
mCurrentImage++;
if (mCurrentImage < count - 1)
{
mRightImageView = [self createImageView:mCurrentImage + 1];
mRightImageView.hidden = YES;
[self addSubview:mRightImageView];
}
else
{
mRightImageView = 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;
}
@end // SlideShowView
#pragma mark -
@implementation SlideShowViewController
@synthesize toolbar;
-(IBAction) goBack:(id) sender{
[self.parentViewController dismissModalViewControllerAnimated:YES];
}
- (id)init
{
if (self = [super initWithNibName:nil bundle:nil])
{
NSArray * images = [NSArray arrayWithObjects:[UIImage imageNamed:@"bifColor.png"],
[UIImage imageNamed:@"DSCF1600.jpg"],
[UIImage imageNamed:@"refresh.png"],
[UIImage imageNamed:@"DSCF1601.jpg"], nil];
self.view = [[[SlideShowView alloc] initWithImages:images] autorelease];
}
return self;
}
@end