Ios 仅可见视图动画
我有以下实现。每个视图都有动画,但我的问题是所有动画都会运行,无论是可见还是不可见。我只希望当前看到的(活动)视图动画工作,其他视图动画将被禁用,除非用户滚动它Ios 仅可见视图动画,ios,icarousel,Ios,Icarousel,我有以下实现。每个视图都有动画,但我的问题是所有动画都会运行,无论是可见还是不可见。我只希望当前看到的(活动)视图动画工作,其他视图动画将被禁用,除非用户滚动它 - (UIView *)carousel:(iCarousel *)carousel viewForItemAtIndex:(NSInteger)index reusingView:(UIView *)view{ if (view == nil){ if(index==0) {
- (UIView *)carousel:(iCarousel *)carousel viewForItemAtIndex:(NSInteger)index reusingView:(UIView *)view{
if (view == nil){
if(index==0)
{
view=[[UIImageView alloc]initWithFrame:CGRectMake(30, 30, 600, 600)];
((UIImageView *)view).animationImages=[NSArray arrayWithObjects:[UIImage imageNamed:@"Walking-1.png"],
[UIImage imageNamed:@"Walking-2.png"],
[UIImage imageNamed:@"Walking-3.png"],
[UIImage imageNamed:@"Walking-4.png"],
[UIImage imageNamed:@"Walking-5.png"],nil];
((UIImageView *)view).animationDuration = 1.5;
[((UIImageView *)view) startAnimating];
}
else if(index==1)
{
view=[[UIImageView alloc]initWithFrame:CGRectMake(30, 30, 600, 600)];
((UIImageView *)view).animationImages=[NSArray arrayWithObjects:[UIImage imageNamed:@"Biking-1.png"],
[UIImage imageNamed:@"Biking-2.png"],
[UIImage imageNamed:@"Biking-3.png"],
[UIImage imageNamed:@"Biking-4.png"],
[UIImage imageNamed:@"Biking-5.png"],nil];
((UIImageView *)view).animationDuration = 1.5;
[((UIImageView *)view) startAnimating];
}
view.contentMode = UIViewContentModeCenter;
[view.layer setMasksToBounds:YES];
}
return view;
}
iCarouselDelegate
有一个方法carouseCurrentitemindexdidchange
您应该在那里停止/启动动画,但不能在数据源方法中。因此,将所有动画保存到索引等于项目索引的数组中,并在carouselCurrentItemIndexDidChange
中使用carousel的currentItemIndex
属性启动相应的动画。您需要将以前的索引存储在类中的某个位置,以便能够在开始新的动画之前停止以前的动画
@import UIKit;
@interface CarouselController: UIViewController
@property(nonatomic, readonly) NSArray *carouselItems;
@property(nonatomic, assign) NSInteger lastItemIndex;
@end
@implementation CarouselController
- (instancetype)init {
self = [super init];
if (self) {
[self initializeCarouselContent];
}
return self;
}
- (instancetype)initWithCoder:(NSCoder *)aDecoder {
self = [super initWithCoder:aDecoder];
if (self) {
[self initializeCarouselContent];
}
return self;
}
- (instancetype)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
[self initializeCarouselContent];
}
return self;
}
- (void)initializeCarouselContent {
self.lastItemIndex = 0;
_carouselItems = @[[CarouselController activityAnimationView: @"Walking"], [CarouselController activityAnimationView: @"Biking"]];
UIImageView *currentAnimation = self.carouselItems[self.lastItemIndex];
[currentAnimation startAnimating];
}
+ (UIImageView *)activityAnimationView:(NSString *)activity {
UIImageView *result = [[UIImageView alloc]initWithFrame:CGRectMake(30, 30, 600, 600)];
NSMutableArray *activityImages = [[NSMutableArray alloc] init];
for (int activityIndex = 1; activityIndex <= 5; activityIndex ++) {
NSString *imageName = [NSString stringWithFormat:@"%@-%i.png", activity, activityIndex];
[activityImages addObject:[UIImage imageNamed:imageName]];
}
result.animationImages = activityImages;
result.animationDuration = 1.5;
result.contentMode = UIViewContentModeCenter;
[result.layer setMasksToBounds:YES];
return result;
}
- (NSInteger)numberOfItemsInCarousel:(iCarousel *)carousel {
return [_carouselItems count];
}
- (UIView *)carousel:(iCarousel *)carousel viewForItemAtIndex:(NSInteger)index reusingView:(UIView *) view{
if (view == nil){
view = self.carouselItems[index];
}
return view;
}
- (void)carouselCurrentItemIndexDidChange:(iCarousel *)carousel {
if (carousel.currentItemIndex != self.lastItemIndex) {
UIImageView *currentAnimation = self.carouselItems[self.lastItemIndex];
[currentAnimation stopAnimating];
self.lastItemIndex = carousel.currentItemIndex;
currentAnimation = self.carouselItems[self.lastItemIndex];
[currentAnimation startAnimating];
}
}
@end
@import-UIKit;
@接口转盘控制器:UIViewController
@属性(非原子,只读)NSArray*旋转木马;
@属性(非原子,赋值)NSInteger lastItemIndex;
@结束
@实现转盘控制器
-(instancetype)初始化{
self=[super init];
如果(自我){
[自初始化CAURESELCONTENT];
}
回归自我;
}
-(instancetype)initWithCoder:(NSCoder*)aDecoder{
self=[super initWithCoder:aDecoder];
如果(自我){
[自初始化CAURESELCONTENT];
}
回归自我;
}
-(instancetype)initWithNibName:(NSString*)nibNameOrNil bundle:(NSBundle*)nibBundleOrNil{
self=[super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
如果(自我){
[自初始化CAURESELCONTENT];
}
回归自我;
}
-(无效)初始化CAURELCONTENT{
self.lastItemIndex=0;
_carouselItems=@[[CarouselController活动动画视图:@“行走”],[CarouselController活动动画视图:@“骑自行车”];
UIImageView*currentAnimation=self.carouselItems[self.lastItemIndex];
[currentAnimation startAnimating];
}
+(UIImageView*)活动动画视图:(NSString*)活动{
UIImageView*result=[[UIImageView alloc]initWithFrame:CGRectMake(30,30,600,600)];
NSMutableArray*activityImages=[[NSMutableArray alloc]init];
对于(int activityIndex=1;activityIndex