[翻译] LTInfiniteScrollView

LTInfiniteScrollView

效果：

Usage - 使用

Create the scroll view by:

通过以下方式来创建出scroll view

self.scrollView = [[LTInfiniteScrollView alloc]initWithFrame:CGRectMake(0, 0, CGRectGetWidth(self.view.bounds), 200)];
[self.view addSubview:self.scrollView];
self.scrollView.dataSource = self;
[self.scrollView reloadData];

Then implement LTInfiniteScrollViewDataSource protocol:

然后实现LTInfiniteScrollViewDataSource协议方法：

@protocol LTInfiniteScrollViewDataSource <NSObject>
-(UIView*) viewAtIndex:(int)index reusingView:(UIView *)view;
-(int) totalViewCount;
-(int) visibleViewCount;
@end

Sample code:

示例源码：

-(int) totalViewCount
{
    // you can set it to a very big number to mimic the infinite behavior, no performance issue here
    return 100000000;
}

-(int) visibleViewCount
{
    return 5;
}

-(UIView*) viewAtIndex:(int)index reusingView:(UIView *)view;
{
    if(view){
        ((UILabel*)view).text = [NSString stringWithFormat:@"%d", index];
        return view;
    }

    UILabel *aView = [[UILabel alloc]initWithFrame:CGRectMake(0, 0, 64, 64)];
    aView.backgroundColor = [UIColor blackColor];
    aView.layer.cornerRadius = 32;
    aView.layer.masksToBounds = YES;
    aView.backgroundColor = [UIColor colorWithRed:0/255.0 green:175/255.0 blue:240/255.0 alpha:1];
    aView.textColor = [UIColor whiteColor];
    aView.textAlignment = NSTextAlignmentCenter;
    aView.text = [NSString stringWithFormat:@"%d", index];
    return aView;
}

If you want to apply any animation during scrolling, implement LTInfiniteScrollViewDelegateprotocol:

如果你想在滑动期间实现其他的动画效果，实现这个LTInfiniteScrollViewDelegateprotocol协议即可：

@protocol LTInfiniteScrollViewDelegate <NSObject>
-(void) updateView:(UIView*) view withDistanceToCenter:(CGFloat)distance scrollDirection:(ScrollDirection)direction;
@end

See the example for details~

请从示例源码中查看更多的细节~