# KYJellyPullToRefresh

**Repository Path**: Calvin_00/KYJellyPullToRefresh

## Basic Information

- **Project Name**: KYJellyPullToRefresh
- **Description**: A shape changing & physical ball pull-to-refresh.
- **Primary Language**: Objective-C
- **License**: MIT
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2020-07-23
- **Last Updated**: 2020-12-19

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README


<p align="left" >
  <img src="logo.png" alt="KYJellyPullToRefresh" title="KYJellyPullToRefresh">
</p>


![CocoaPods Version](https://img.shields.io/badge/pod-v1.1.0-brightgreen.svg)
![License](https://img.shields.io/badge/license-MIT-blue.svg)
![Platform](https://img.shields.io/badge/platform-iOS-red.svg)



![](ball.gif)


##Usage

`pod 'KYJellyPullToRefresh', '~> 1.1.0'`


##How To Use

Firstly,in your ViewController or TableViewController,initiate the Jellview and the "displayLink"  in the `- (void)scrollViewDidScroll:(UIScrollView *)scrollView`  method:
Like this:
```objective-c
- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
    if (self.displayLink == nil && (-scrollView.contentOffset.y - 64.5) > 0) {
        self.jellyView = [[JellyView alloc]initWithFrame:CGRectMake(0, -jellyHeaderHeight , [UIScreen mainScreen].bounds.size.width, jellyHeaderHeight)];
        self.jellyView.backgroundColor = [UIColor clearColor];
        [self.view insertSubview:self.jellyView aboveSubview:self.tableView];
        self.displayLink = [CADisplayLink displayLinkWithTarget:self selector:@selector(displayLinkAction:)];
        [self.displayLink addToRunLoop:[NSRunLoop mainRunLoop] forMode:NSRunLoopCommonModes];
    }
}
```

Then you should change the controlPoint of the Bezier Path

```objective-c
-(void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate{

    CGFloat offset = -scrollView.contentOffset.y - 64.5;
    if (offset >= 130) {
        self.jellyView.isLoading = YES;
        [UIView animateWithDuration:0.3 delay:0.0f usingSpringWithDamping:0.4f initialSpringVelocity:0.0f options:UIViewAnimationOptionCurveEaseInOut animations:^{
            
            self.jellyView.controlPoint.center = CGPointMake(self.jellyView.userFrame.size.width / 2, jellyHeaderHeight);
            NSLog(@"self.jellyView.controlPoint.center:%@",NSStringFromCGPoint(self.jellyView.controlPoint.center));
            self.tableView.contentInset = UIEdgeInsetsMake(130+64.5, 0, 0, 0);
        } completion:^(BOOL finished) {
            [self performSelector:@selector(backToTop) withObject:nil afterDelay:2.0f];
        }];
    }
}

```

Lastest,remove everything:

```objective-c
//动画结束，删除一切
-(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{

    if (self.jellyView.isLoading == NO) {
        [self.jellyView removeFromSuperview];
        self.jellyView = nil;
        [self.displayLink invalidate];
        self.displayLink = nil;
    }
}

```


Intro:  [http://kittenyang.com/cadisplaylinkanduibezierpath/](http://kittenyang.com/cadisplaylinkanduibezierpath/)


##License
This project is under MIT License. See LICENSE file for more information.