DroppyScrollView

Vertical scroll view with abilty to inserting and removing subviews top or any index with stylish dropping animations.
Just use dropSubview:atIndex: or dropSubview: instead of addSubview:.

Demo

Usage

Copy & paste the DroppyScrollView.h/m to your project.
Implement it just like any UIScrollView

DroppyScrollView *droppy = [[DroppyScrollView alloc] initWithFrame:self.view.frame];
[self.view addSubview:droppy];

For dropping subview

    //create your subview
    UIView *v = ...
    ...
    
    [droppy dropSubview:v];

Droppy automagically sets its contentSize when you add or remove subviews.
You can add or remove a view at any index.

- (void)dropSubview:(UIView *)view atIndex:(NSInteger)index;

- (void)removeSubviewAtIndex:(NSInteger)index;

Optional Values

@property (nonatomic, assign) CGFloat itemPadding;

Padding between the views. Default is 10.

typedef NS_ENUM(NSUInteger, DroppyScrollViewDefaultDropLocation) {
    DroppyScrollViewDefaultDropLocationTop,
    DroppyScrollViewDefaultDropLocationBottom,
};

@property (assign) DroppyScrollViewDefaultDropLocation defaultDropLocation;

Default drop location used in dropSubview: function. DroppyScrollViewDefaultDropLocationBottom is the default value.

    #define SpringDamping   0.5
    #define SpringVelocity  0.1
    #define Duration        0.5

Values for animation duration and spring