大家好，我有一个UIViewControllerUIImageView，我有一个SwipeGestureRecognizer。因此，如果用户向左或向右滑动，它将图像change。UIImageView到目前为止它的工作。UIScrollView在启用分页的情况下，我不能使用其中一个图像的大小。我想实现拖动的效果，并UIImageView像UIScrollView图像中那样查看下一部分。
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3188 次
6 回答
3
简单的回答：
为图像视图添加两个手势并放置一个计数变量，根据滑动和否切换计数变量。的图像。最后根据计数更改图像。
使用此代码也可以正常工作且简单。
- (void)addAnimationPresentToView:(UIView *)viewTobeAnimated
{
CATransition *transition = [CATransition animation];
transition.duration = 0.30;
transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear];
[transition setValue:@"IntroSwipeIn" forKey:@"IntroAnimation"];
transition.fillMode=kCAFillModeForwards;
transition.type = kCATransitionPush;
transition.subtype =kCATransitionFromRight;
[viewTobeAnimated.layer addAnimation:transition forKey:nil];
}
- (void)addAnimationPresentToViewOut:(UIView *)viewTobeAnimated
{
CATransition *transition = [CATransition animation];
transition.duration = 0.30;
transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear];
[transition setValue:@"IntroSwipeIn" forKey:@"IntroAnimation"];
transition.fillMode=kCAFillModeForwards;
transition.type = kCATransitionPush;
transition.subtype =kCATransitionFromLeft;
[viewTobeAnimated.layer addAnimation:transition forKey:nil];
}
- (void)viewDidLoad
{
[super viewDidLoad];
count = 0;
// Do any additional setup after loading the view from its nib.
[self.imageViewSwipe setUserInteractionEnabled:YES];
UISwipeGestureRecognizer *swipeLeft = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipe:)];
UISwipeGestureRecognizer *swipeRight = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeRight:)];
// Setting the swipe direction.
[swipeLeft setDirection:UISwipeGestureRecognizerDirectionLeft];
[swipeRight setDirection:UISwipeGestureRecognizerDirectionRight];
// Adding the swipe gesture on image view
[self.imageViewSwipe addGestureRecognizer:swipeLeft];
[self.imageViewSwipe addGestureRecognizer:swipeRight];
}
-(void)changeImage
{
switch (count) {
case 1:
self.imageViewSwipe.image = [UIImage imageNamed:@"Screen Shot 2013-09-17 at 10.57.51 AM.png"];
break;
case 2:
self.imageViewSwipe.image = [UIImage imageNamed:@"Screen Shot 2013-09-17 at 10.58.04 AM.png"];
break;
case 3:
self.imageViewSwipe.image = [UIImage imageNamed:@"Screen Shot 2013-09-17 at 10.58.00 AM.png"];
break;
default:
break;
}
}
-(void)handleSwipe:(id)sender
{
if(count < 4)
{
count++;
UIImageView *moveIMageView = self.imageViewSwipe;
[self addAnimationPresentToView:moveIMageView];
[self changeImage];
}
}
-(void)handleSwipeRight:(id)sender
{
if(count>0)
{
count--;
UIImageView *moveIMageView = self.imageViewSwipe;
[self addAnimationPresentToViewOut:moveIMageView];
[self changeImage];
}
}
-(void)handleSwipe:(id)sender
{
if(count < 4)
{
count++;
[self changeImage];
}
}
-(void)handleSwipeRight:(id)sender
{
if(count>0)
{
count--;
[self changeImage];
}
}
于 2013-09-20T09:14:42.050 回答
2
将滚动视图添加到主视图（适当设置框架）
[mainview addSubview:scr];
写一个方法，如：
- (void)setupScrollView:(UIScrollView*)scrMain {
}
然后viewDidLoad将滚动视图传递给方法，
[self setupScrollView:scr];
- (void)setupScrollView:(UIScrollView*)scrMain {
// we have 10 images here.
// we will add all images into a scrollView & set the appropriate size.
for (int i=1; i<=5; i++) {
// create image
// UIImage *image = [UIImage imageNamed:[NSString stringWithFormat:@"sti%02i.png",i]];
UIImage *image = [UIImage imageNamed:[NSString stringWithFormat:@"sti%02i.png",i]];
// create imageView
// NSLog(@"===============>%d",i);
UIImageView *imgV = [[UIImageView alloc] initWithFrame:CGRectMake((i-1)*scrMain.frame.size.width, 0, scrMain.frame.size.width, scrMain.frame.size.height)];
// set scale to fill
imgV.contentMode=UIViewContentModeScaleToFill;
// set image
[imgV setImage:image];
// apply tag to access in future
imgV.tag=i+1;
// add to scrollView
[scrMain addSubview:imgV];
}
// set the content size to 10 image width
[scrMain setContentSize:CGSizeMake(scrMain.frame.size.width*5, scrMain.frame.size.height)];
// enable timer after each 2 seconds for scrolling.
// [NSTimer scheduledTimerWithTimeInterval:2 target:self selector:nil userInfo:nil repeats:YES];
}
它使您可以手动在两个方向上移动。
于 2013-09-20T09:01:13.823 回答
1
*您可以尝试使用 imageView.layer 来提供一些动画效果。
*
于 2013-09-20T08:59:02.620 回答
1
我认为最好的是使用UIPanGestureRecognizer：
UIPanGestureRecognizer * pan1 = [[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(moveObject:)];
pan1.minimumNumberOfTouches = 1;
[image1 addGestureRecognizer:pan1];
-(void)moveObject:(UIPanGestureRecognizer *)pan;
{
image1.center = [pan locationInView:image1.superview];
}
当您开始拖动时，以某种方式检查方向。如果方向是从左到右，则使用 -image.width 将“之前”图像添加到屏幕，并在 move 方法中移动此 imageBefore.center = [pan locationInView:image1.superview]; 也。如果方向是从右到左，则使用 +screensize+image.width 将“下一个”图像添加到 scree，并在 move 方法中移动此 imageNext.center = [pan locationInView:image1.superview]; 也。
我还没有尝试过，但我认为它应该可以工作。我希望它有帮助
编辑：
我为您找到了如何检测方向：
-(void)moveObject:(UIPanGestureRecognizer *)pan;
{
CGPoint vel = [pan velocityInView:self.view];
if (vel.x > 0)
{
// user dragged towards the right
counter++;
}
else
{
// user dragged towards the left
counter--;
}
}
于 2013-09-20T09:04:01.383 回答
0
实现水平表格滚动
创建一个 TableView 并转换表格
self.horizontalTableView.transform = CGAffineTransformMakeRotation(-M_PI * 0.5);
然后，您将转换反向应用于单元格内的内容。
CGAffineTransformMakeRotation(M_PI * 0.5)
如果需要，您可以将其放入自定义 UITableViewCell 内的另一个 TableView 中，并有一个水平表的垂直表。
您将获得本机滚动的所有好处
请参阅本教程：
于 2014-05-11T23:01:42.190 回答
0
-(void)panTableView:(UISwipeGestureRecognizer *)pan{
if (pan.state==UIGestureRecognizerStateEnded) {
int curr=currentPage;
if (pan==self.panGestureLeft)
{
// user dragged towards the right
CATransition *transition = [CATransition animation];
transition.duration = 0.35;
transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
transition.type = kCATransitionPush;
transition.subtype =kCATransitionFromRight;
transition.delegate = self;
[scrollview.layer addAnimation:transition forKey:nil];
}
else if (pan==self.panGestureRight)
{
// user dragged towards the left
CATransition *transition = [CATransition animation];
transition.duration = 0.35;
transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
transition.type = kCATransitionPush;
transition.subtype =kCATransitionFromLeft;
transition.delegate = self;
[scrollview.layer addAnimation:transition forKey:nil];
}
}
}
于 2013-09-20T09:35:58.163 回答