（1）申明
[objc]
@interface ViewController : UIViewController <UIScrollViewDelegate>{
UIScrollView *imageScrollView;
UIPageControl *pageControl;
}
@end
（2）
[objc]
//添加UIScrollView
-(void)addScrollView {
imageScrollView = [[UIScrollView alloc]initWithFrame:CGRectMake(150, 150, 520, 325)];
imageScrollView.backgroundColor = [UIColor clearColor];
imageScrollView.contentSize = CGSizeMake(520*7, 325); // 设置内容大小
imageScrollView.delegate = self;
imageScrollView.pagingEnabled = YES;
imageScrollView.showsHorizontalScrollIndicator = NO;//滚动的时候是否有水平的滚动条，默认是有的
int a = 0;
for (int i = 0; i < 7; i++) {
UIImageView *imageView = [[UIImageView alloc]initWithFrame:CGRectMake(0+a, 0, 520, 325)];
imageView.image = [UIImage imageNamed:[NSString stringWithFormat:@"%d.png",i]];
imageView.tag = 110 + i;
imageView.userInteractionEnabled=YES;//与用户交互
[imageScrollView addSubview:imageView];
//为UIImageView添加点击手势
UITapGestureRecognizer *tap;
tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tap:)];
tap.numberOfTapsRequired = 1;//tap次数
tap.numberOfTouchesRequired = 1;//手指数
[imageView addGestureRecognizer:tap];
a += 520;
}
[self.view addSubview:imageScrollView];
}
//添加PageControl
-(void) addPageControl {
pageControl = [[UIPageControl alloc]initWithFrame:CGRectMake(768/2-150, 440, 320, 40)];
pageControl.numberOfPages = 7;//页数（几个圆圈）
pageControl.tag = 101;
pageControl.currentPage = 0;
[self.view addSubview:pageControl];
}
//单击图片之后响应的
-(void) tap: (UITapGestureRecognizer*)sender{
NSLog(@"tap %ld image",(long)pageControl.currentPage);
}
//滚动视图的代理方法－ scrollview 减速停止
-(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView {
int current = scrollView.contentOffset.x/400;
NSLog(@"current:%d",current);
pageControl.currentPage = current;
}
(3)
[objc]
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
self.view.backgroundColor = [UIColor cyanColor];
[self addScrollView];
[self addPageControl];
}
效果图：
－－
之前有个这个警告
原因：这个方法的参数scrollView跟我定义的UIScrollView *scrollView同名。把自己定义的
UIScrollView 名字改了就可以拉。。
