Latest 4.3.2
Homepage https://github.com/ltebean/LTInfiniteScrollView
License MIT
Platforms ios 7.0, requires ARC
Authors

LTInfiniteScrollView

Demo

1. You can apply animation to each view during the scroll:

LTInfiniteScrollView

2. The iOS 9 task switcher animation can be implemented in ten minutes with the support of this lib:

LTInfiniteScrollView

3. The fancy menu can also be implemented easily:

LTInfiniteScrollView

4. Vertical scroll is also supported:

LTInfiniteScrollView

Usage

Create the scroll view by:

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

Then implement LTInfiniteScrollViewDataSource protocol:

@protocol LTInfiniteScrollViewDataSource<NSObject>
- (UIView *)viewAtIndex:(NSInteger)index reusingView:(UIView *)view;
- (NSInteger)numberOfViews;
- (NSInteger)numberOfVisibleViews;
@end

Sample code:

- (NSInteger)numberOfViews
{
    // you can set it to a very big number to mimic the infinite behavior, no performance issue here
    return 9999; 
}

- (NSInteger)numberOfVisibleViews
{
    return 5;
}

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

LTInfinitedScrollView interface:

@interface LTInfiniteScrollView: UIView
@property (nonatomic, readonly) NSInteger currentIndex;
@property (nonatomic, weak) id<LTInfiniteScrollViewDataSource> dataSource;
@property (nonatomic, weak) id<LTInfiniteScrollViewDelegate> delegate;
@property (nonatomic) BOOL verticalScroll;
@property (nonatomic) BOOL scrollEnabled;
@property (nonatomic) BOOL pagingEnabled;
@property (nonatomic) BOOL bounces;
@property (nonatomic) UIEdgeInsets contentInset;
@property (nonatomic) NSInteger maxScrollDistance;

- (void)reloadDataWithInitialIndex:(NSInteger)initialIndex;
- (void)scrollToIndex:(NSInteger)index animated:(BOOL)animated;
- (UIView *)viewAtIndex:(NSInteger)index;
- (NSArray *)allViews;
@end

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

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

The value of progress indicates the relative position of that view, if there are 5 visible views, the value will be ranged from -2 to 2:

|                  |
|-2  -1   0   1   2|
|                  |

You can clone the project and investigate the example for details.

the Swift version

Here’s the Swift version: https://github.com/ltebean/LTInfiniteScrollView-Swift

Latest podspec

{
    "name": "LTInfiniteScrollView",
    "version": "4.3.2",
    "summary": "An infinite scrollview allowing easily applying animation",
    "homepage": "https://github.com/ltebean/LTInfiniteScrollView",
    "license": "MIT",
    "authors": {
        "ltebean": "[email protected]"
    },
    "source": {
        "git": "https://github.com/ltebean/LTInfiniteScrollView.git",
        "tag": "v4.3.2"
    },
    "source_files": "LTInfiniteScrollView/LTInfiniteScrollView.{h,m}",
    "requires_arc": true,
    "platforms": {
        "ios": "7.0"
    }
}

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