• UI<03>


    //声明 UIScrollView-》#27932A  #952775 #602AAB
    @property (nonatomic,strong) UIScrollView *scrollview;
    //声明 UIImageView
    @property (nonatomic,strong) UIImageView *imageview;
     
        //初始化 UIScrollView
        self.scrollview = [[UIScrollView alloc] init];
        //设置 frame
        self.scrollview.frame = self.imageview.bounds;
        //设置背景色
        self.scrollview.backgroundColor = [UIColor blueColor];
        //设置滚动范围
        self.scrollview.contentSize = CGSizeMake(self.imageview.image.size.width, self.imageview.image.size.height);
        //设置滚动的位置
        self.scrollview.contentOffset = CGPointMake(0,0);
        //设置内边距
        self.scrollview.contentInset = UIEdgeInsetsMake(0,0, 80, 100)
        ;
        //设置是否有弹簧效果
        self.scrollview.bounces = YES;
        //默认no,控制垂直方向遇到边框是否反弹(但bounces为NO时,它为yes,也不反弹)
        self.scrollview.alwaysBounceVertical = YES;
        //默认no,控制水平方向遇到边框是否反弹(但bounces为NO时,它为yes,也不反弹)
        self.scrollview.alwaysBounceHorizontal = YES;
        //是否允许滚动到顶部
        self.scrollview.scrollsToTop = YES;
        //设置是否分页
        self.scrollview.pagingEnabled = NO;
        //设置是否允许拖动
        self.scrollview.scrollEnabled = YES;
        //设置是否显示水平滚动条
        self.scrollview.showsHorizontalScrollIndicator = YES;
        //设置是否显示垂直滚动条
        self.scrollview.showsVerticalScrollIndicator = YES;
        //设置滚动条的位置
        self.scrollview.scrollIndicatorInsets = UIEdgeInsetsMake(0,0,0,0);
        //设置滚动条的样式
        self.scrollview.indicatorStyle = UIScrollViewIndicatorStyleDefault;
       
        //设置 代理
        self.scrollview.delegate = self;
       
        //设置最大/最小缩放比
        self.scrollview.maximumZoomScale = 1.0;
        self.scrollview.minimumZoomScale = 3.5;
       
       
        [self.view addSubview:self.scrollview];
        [self.scrollview addSubview:self.imageview];
     
     
     
        CGFloat Y = self.scrollview.contentOffset.y + 5;
        CGFloat X = self.scrollview.contentOffset.x + 5;
        //设置滚动的位置
        [self.scrollview setContentOffset:CGPointMake(X, Y) animated:YES];
       
     
       
    //遵守代议 :UIScrollViewDelegate
    #pragma mark - Delegate

    //正在滚动
    - (void)scrollViewDidScroll:(UIScrollView *)scrollView{
       
        NSLog(@"正在滚动...");
       
    }
    //即将开始滚动。
    -(void)scrollViewWillBeginDragging:(UIScrollView *)scrollView{
       
         NSLog(@"即将开始滚动...");
       
    }
    //完成滚动(松手后调用)
    -(void)scrollViewWillEndDragging:(UIScrollView *)scrollView withVelocity:(CGPoint)velocity targetContentOffset:(inout CGPoint *)targetContentOffset{
       
        NSLog(@"完成滚动...");
       
    }
    //开始减速滚动(完成滚动 调用)
    -(void)scrollViewWillBeginDecelerating:(UIScrollView *)scrollView{
       
        NSLog(@"开始减速滚动...");
       
    }
    //结束减速滚动 (滚动结束调用)
    -(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{
       
        NSLog(@"结束减速滚动...");
       
    }
    //滚动到顶部
    -(BOOL)scrollViewShouldScrollToTop:(UIScrollView *)scrollView{
       
         NSLog(@"滚动到顶部...");
        return YES;
    }
    //滚动到顶部调用(scrollsToTop 设置为YES时点击状态栏调用)
    -(void)scrollViewDidScrollToTop:(UIScrollView *)scrollView{
       
         NSLog(@"滚动到顶部调用...");
    }
    //设置缩放的对象
    -(UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView{
       
       
        return self.imageview;
       
    }
    //即将开始缩放
    -(void)scrollViewWillBeginZooming:(UIScrollView *)scrollView withView:(UIView *)view{
       
          NSLog(@"即将开始缩放...");
       
    }
    //正在缩放
    -(void)scrollViewDidZoom:(UIScrollView *)scrollView{
       
        NSLog(@"正在缩放...");
       
    }
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  • 原文地址:https://www.cnblogs.com/iQingYang/p/6677499.html
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