ios scrollView中增加动画效果，自动滚动UIScrollView，利用了NSTimer

转载自：http://blog.csdn.net/z343929897/article/details/7974753

按照赵总要求，在首页上边需要加广告条，本来以为挺复杂的，原来挺简单

@property (strong, nonatomic) IBOutlet UIPageControl *page;
@property (strong, nonatomic) IBOutlet UIScrollView *imageScrollView;

@synthesize page;
@synthesize imageScrollView;

- (void)viewDidLoad
{[super viewDidLoad];//这里定义了滚动视图的大小，是否支持翻页，是否显示水平滚动标示，委托对象是哪个imageScrollView.contentSize = CGSizeMake(PAGENUM * 320.0f, imageScrollView.frame.size.height);imageScrollView.pagingEnabled = YES;imageScrollView.showsHorizontalScrollIndicator = NO;imageScrollView.delegate = self;//这里为滚动视图添加了子视图，为了能添加后续操作，我这里定义的子视图是按键UIButtonfor (int i = 0; i < PAGENUM; i++) {NSString * fileName = [NSString stringWithFormat:@"%d.jpg",i+1];UIButton *imageButton = [[UIButton alloc] initWithFrame:CGRectMake(i * 320.0f,  0.0f, 320.0f, 218.0f)];[imageButton setBackgroundImage:[UIImage imageNamed:fileName] forState:UIControlStateNormal];imageButton.tag = 900 + i;[imageScrollView addSubview:imageButton];}//定义PageController 设定总页数，当前页，定义当控件被用户操作时,要触发的动作。�0�2page.numberOfPages = PAGENUM;page.currentPage = 0;[page addTarget:self action:@selector(pageTurn:) forControlEvents:UIControlEventValueChanged];//使用NSTimer实现定时触发滚动控件滚动的动作。timeCount = 0;[NSTimer scheduledTimerWithTimeInterval:5 target:self selector:@selector(scrollTimer) userInfo:nil repeats:YES];}

//滚图的动画效果
-(void)pageTurn:(UIPageControl *)aPageControl{int whichPage = aPageControl.currentPage;[UIView beginAnimations:nil context:NULL];[UIView setAnimationDuration:0.3f];[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];[imageScrollView setContentOffset:CGPointMake(320.0f * whichPage, 0.0f) animated:YES];[UIView commitAnimations];
}//定时滚动
-(void)scrollTimer{timeCount ++;if (timeCount == PAGENUM) {timeCount = 0;}

	//chenyong　在这个地方加上self.pageController.currentpage = timeCount; 即可改变pageCon了，切记不要加到timeCount++的下边

    [imageScrollView scrollRectToVisible:CGRectMake(timeCount * 320.0, 65.0, 320.0, 218.0) animated:YES];
}

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