dengwanli/SDK/UI/CarouselView/ShoesCarouselView.m

//
//  ShoesCarouselView.m
//  Unity-iPhone
//
//  Created by duowan123 on 2021/8/31.
//

#import "ShoesCarouselView.h"

#import "ShoesCollectionCell.h"
#import "TXCarouselViewLayout.h"

#import "ShoesPeripheralMolde.h"
#import <CoreMotion/CoreMotion.h>

#define itemHight 1

//当前 carousel 状态
@interface  CarouselCurrentState : NSObject
@property (nonatomic, assign) BOOL isOverturnState; //是否进入翻转状态
@property (nonatomic, assign) BOOL isDragState;     //是否处于拖动状态
@property (nonatomic, assign) BOOL isDidScroll;     //是否处于滑动状态
@property (nonatomic, assign) BOOL isCenter;        //是否处于回到正中状态
@property (nonatomic, assign) BOOL isRestrict;      //是否处于限制重力感应
@property (nonatomic, assign) CGFloat lastCarouselPoint;//上一个lastPoint

@end

@implementation CarouselCurrentState
@end

typedef void (^OpenAccelerometerUpdatesBlock)(CGFloat value);
typedef void (^OpenGyroUpdatesBlock)(CGFloat value);

@interface ShoesCarouselView ()<
UICollectionViewDelegateFlowLayout,
UICollectionViewDataSource,
UICollectionViewDelegate,
UIScrollViewDelegate
>

@property (nonatomic, strong) TXCarouselViewLayout *carouselViewLayout;
@property (nonatomic, strong) CarouselCurrentState *currentState;//当前 carousel 状态
@property (nonatomic, strong) UIScrollView *superScrollView;
@property (nonatomic, strong) UICollectionView *collectionView;
@property (nonatomic, assign) CGFloat lasttimePoint;
@property (nonatomic, assign) CGFloat gyrValue;//加速计值
@property (nonatomic, assign) CGSize carouselSize;

@property (nonatomic, assign)CGFloat lastContentOffsetY;

@property (nonatomic, assign) CGFloat cIndex;
@property (nonatomic, assign) BOOL turnLeft;//滑动方向


@property (nonatomic, strong) NSMutableArray *modelArray;

@end

@implementation ShoesCarouselView

#pragma mark - 生命周期
- (instancetype)initWithCoder:(NSCoder *)coder{
    
    self = [super initWithCoder:coder];
    if (self){
        self.currentState = [[CarouselCurrentState alloc]init];
        self.currentState.isOverturnState = NO;
        self.currentState.isDragState = NO;
        self.currentState.isDidScroll = NO;
        self.currentState.isCenter = NO;
        self.currentState.isRestrict = NO;
        
        self.userInteractionEnabled = NO;
        self.collectionView.scrollEnabled = NO;
  
    }
    return self;
    
}

//
-(void)layoutSubviews{
    
    NSLog(@"layoutSubviewslayoutSubviewslayoutSubviewslayoutSubviews");
    self.carouselSize = self.frame.size;
    [self createCollectionView];
    [self.collectionView reloadData];
    [self.collectionView layoutIfNeeded];
    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.0 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
        [self setpoint];
    });
    NSLog(@"这里运行一次");
    //监听滑动结束的状态
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(getNotificationAction:) name:@"ThisIsANoticafication" object:nil];
    
}

//
-(void)setpoint{
    NSLog(@"setpoint");
    [self.collectionView setContentOffset:CGPointMake(0, self.collectionView.contentOffset.y) animated:NO];
    [self.collectionView setContentOffset:CGPointMake(0+((self.modelArray.count/2)*(self.carouselSize.height*itemHight)), self.collectionView.contentOffset.y) animated:NO];
    self.currentState.lastCarouselPoint = 0;
    [self setSlideEnd];
}

#pragma  mark - loadData
-(void)setArrayData:(NSArray<ShoesPeripheralMolde *> *)array{
    
    if (array.count<=0){
        return;
    }
    if (array.count == self.modelArray.count) {//没有新的数据源不刷新
        return;
    }
    
    [self.modelArray removeAllObjects];

    [self.modelArray addObjectsFromArray:array];
    
    [self.collectionView reloadData];
    [self.collectionView layoutIfNeeded];
    
    // 当只有一个数据源的时候 让cell滑到正中间
    if (array.count==1){
        
//        NSLog(@"设备列表只有一个数据源");
        _cIndex = 0;
        [self testAction];
        
    }else{
        
        dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.0 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
            
            if (array.count>=5){

            }else{
                
                [self setpoint];
                
            }
            
         });
        
    }
        
    // 当只有两个数据源的时候 添加手势 防止collectionView数据少 没有占满屏幕 时候滑不动的BUG
    if (array.count>=2){
        UISwipeGestureRecognizer *  left = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(handleSwipeFrom:)];
       [left setDirection:(UISwipeGestureRecognizerDirectionLeft)];
       [self.collectionView addGestureRecognizer:left];
        UISwipeGestureRecognizer *  right = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(handleSwipeFrom:)];
       [right setDirection:(UISwipeGestureRecognizerDirectionRight)];
       [self.collectionView addGestureRecognizer:right];
     }
    
    self.collectionView.scrollEnabled = NO;
    
}

#pragma mark -- UISwipeGestureRecognizer
- (void)handleSwipeFrom:(UISwipeGestureRecognizer *)recognizer{
    
   if(recognizer.direction == UISwipeGestureRecognizerDirectionLeft){
       [self yw_gotoNext:1];
   }
    
   if(recognizer.direction == UISwipeGestureRecognizerDirectionRight){
       [self yw_gotoNext:-1];
   }
    
}

#pragma mark -- scrollView delegate
-(void)scrollViewWillBeginDragging:(UIScrollView *)scrollView{
    NSLog(@"scrollViewWillBeginDragging");
    self.lastContentOffsetY = scrollView.contentOffset.x;
 }

-(void)scrollViewDidScroll:(UIScrollView *)scrollView{
//    NSLog(@"scrollViewDidScroll");
    if (scrollView.contentOffset.x < self.lastContentOffsetY){
//        NSLog(@"左左");
        self.turnLeft = YES;

    }else if (scrollView.contentOffset.x > self.lastContentOffsetY){
//        NSLog(@"右右");
        self.turnLeft = NO;
   
    }
    
}

#pragma mark -- collectionView delegate
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section{
//    NSLog(@"self.modelArray.count - %ld",self.modelArray.count);
    return  self.modelArray.count;
}

- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{
    
    ShoesCollectionCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"ShoesCollectionCell" forIndexPath:indexPath];
    ShoesPeripheralMolde * model = self.modelArray[indexPath.row];
    [cell setCarouselCellModel:model];
    
    __weak typeof(self) weakSelf = self;
    //单击cell 滚到cell位置
    cell.tapGestureBlock = ^(NSInteger i){
        
        if (i==_cIndex) {
            NSLog(@"didSelectItemAtIndexPath 点击的 是 当前");
            _cIndex = i;
            if ([self.delegate respondsToSelector:@selector(connectDevice:)]){
                [self.delegate connectDevice:model.peripheral];
            }
            
        }else{
            
            NSLog(@"didSelectItemAtIndexPath 点击的 不是 当前");
            _cIndex = i;
            [weakSelf testAction];
            
        }
        
    };
    
    //默认选中
    [self jugeSelected];

    return cell;
    
}

- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath{
    
//    NSLog(@"选中了  ==== %ld",(long)indexPath.row);
    ShoesCollectionCell * cell = (ShoesCollectionCell*)[self.collectionView cellForItemAtIndexPath:indexPath];
    cell.cusSelected = YES;
    
    //将当前滚动到的cell->蓝牙 回调给SearchDeviceViewController
    ShoesPeripheralMolde * model = self.modelArray[indexPath.row];
    
    if ([self.delegate respondsToSelector:@selector(setCurrentperipheral:)]){
        [self.delegate setCurrentperipheral:model.peripheral];
    }
      
}

- (void)collectionView:(UICollectionView *)collectionView didDeselectItemAtIndexPath:(NSIndexPath *)indexPath{
//    NSLog(@"未选中  ==== %ld",(long)indexPath.row);
    ShoesCollectionCell * cell = (ShoesCollectionCell*)[self.collectionView cellForItemAtIndexPath:indexPath];
    cell.cusSelected = NO;
}

#pragma mark - privately method
/**
 回到屏幕正中间
 */
-(void)setSlideEnd{
    
    NSLog(@"setSlideEnd");

    CGPoint collectionViewPoint = self.collectionView.contentOffset;
    if ( self.currentState.lastCarouselPoint == collectionViewPoint.x||self.currentState.isDragState){
        return;
    }
    CGFloat viewHeight = CGRectGetWidth(self.collectionView.frame);
    CGFloat itemHeight = self.carouselSize.height*itemHight;
    CGFloat index = roundf((self.collectionView.contentOffset.x+ viewHeight / 2 - itemHeight / 2) /itemHeight)-1;
//    NSLog(@"setSlideEnd:x[%f]----y[%f]---index[%f]",collectionViewPoint.x,collectionViewPoint.y,index);

    collectionViewPoint.x = itemHeight * index + itemHeight / 2 - viewHeight / 2;

    [self.collectionView setContentOffset:CGPointMake(collectionViewPoint.x, collectionViewPoint.y) animated:YES];
    self.currentState.lastCarouselPoint = self.collectionView.contentOffset.x;
    self.currentState.isDidScroll = YES;

    _cIndex = index;
//    NSLog(@"setSlideEnd:x[%f]----y[%f]---index[%f]",collectionViewPoint.x,collectionViewPoint.y,index);
    
    [self jugeSelected];

}

#pragma mark yw add 限制点击事件
- (void)yw_gotoNext:(NSInteger)index{
    
    NSLog(@"yw_gotoNext:(NSInteger)index = %d %ld",(int)_cIndex,(long)index);
    if ((int)_cIndex<1 && index == -1){//滑到最左边
        return;
    }else if ((int)_cIndex>self.modelArray.count-2 && index == 1){//滑到最右边
        return;
    }else{
        _cIndex = _cIndex + index;
        [self testAction];
    }
    
}

//setContentOffset到对应位置
- (void)testAction{
    NSLog(@"testAction");
    CGFloat viewHeight = CGRectGetWidth(self.collectionView.frame);
    CGFloat itemHeight = self.carouselSize.height*itemHight;
    CGFloat offsetX = (_cIndex + (itemHeight/2)/itemHeight - (viewHeight/2)/itemHeight)*itemHeight;
//    NSLog(@"testAction:%f----_cIndex:%f",offsetX,_cIndex);
    [self.collectionView setContentOffset:CGPointMake(offsetX, 0) animated:YES];
    
    [self jugeSelected];
    
}

#pragma mark leon add
- (void)getNotificationAction:(NSNotification *)notification{
    
    NSDictionary * infoDic = [notification object];
    // 这样就得到了我们在发送通知时候传入的字典了
    NSNumber * number = infoDic[@"parameter"];
    NSInteger i = [number integerValue];

    NSLog(@"通知 number ==== %@  _cIndex = %f self.modelArray.count = %lu",number,_cIndex,(unsigned long)self.modelArray.count);

    _cIndex = i;
    [self endScroll];

    if (i==1&&self.turnLeft==YES){
                
        NSLog(@"滑到最左边");
        _cIndex = 0;
        [self endScroll];
        
    }
    if (i==self.modelArray.count-2&&self.turnLeft==NO){

        NSLog(@"滑到最右边");
        _cIndex = self.modelArray.count-1;
        [self endScroll];
    }
    
}

//
-(void)endScroll{
    
    NSLog(@"endScroll");
    
    __weak typeof(self)WeakSelf = self;
    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.1 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
   
        CGFloat viewHeight = CGRectGetWidth(self.collectionView.frame);
        CGFloat itemHeight = self.carouselSize.height*itemHight;
        CGFloat offsetX = (_cIndex + (itemHeight/2)/itemHeight - (viewHeight/2)/itemHeight)*itemHeight;
        //滚动到对应位置
        [WeakSelf.collectionView setContentOffset:CGPointMake(offsetX, 0) animated:YES];
        //当前选中的是哪个
        [WeakSelf jugeSelected];
        
    });
  
}

//判断哪个cell是选中的
-(void)jugeSelected{
    
    NSLog(@"jugeSelected (NSInteger)_cIndex = %ld",(NSInteger)_cIndex);
    //判断哪个是选中的
    for (NSInteger i =0; i<self.modelArray.count; i++){
        
        if (i == (NSInteger)_cIndex){//选中的cell
            
             NSIndexPath *indexPath = [NSIndexPath indexPathForItem:(NSInteger)_cIndex inSection:0];
            if ([self.collectionView.delegate respondsToSelector:@selector(collectionView:didSelectItemAtIndexPath:)]){
                [self.collectionView.delegate collectionView:self.collectionView didSelectItemAtIndexPath:indexPath];
            }
            
        }else{
            
            NSIndexPath *indexPath = [NSIndexPath indexPathForItem:i inSection:0];
           if ([self.collectionView.delegate respondsToSelector:@selector(collectionView:didDeselectItemAtIndexPath:)]){
               [self.collectionView.delegate collectionView:self.collectionView didDeselectItemAtIndexPath:indexPath];
           }
            
        }
        
    }
    
}

#pragma mark - Lazy
-(TXCarouselViewLayout *)carouselViewLayout{
    
    if (!_carouselViewLayout){
        CGFloat itemsHeight = _carouselSize.height*itemHight;
        _carouselViewLayout = [[TXCarouselViewLayout alloc] init];
        _carouselViewLayout.itemSize = CGSizeMake(itemsHeight, itemsHeight);
        _carouselViewLayout.scrollDirection = UICollectionViewScrollDirectionHorizontal;
    }
    return _carouselViewLayout;
    
}

-(void)createCollectionView{
    
    if (!self.collectionView){
        self.collectionView = [[UICollectionView alloc] initWithFrame:CGRectMake(0, 0, self.frame.size.width,self.frame.size.height ) collectionViewLayout:self.carouselViewLayout];
        self.collectionView.dataSource = self;
        self.collectionView.delegate = self;
        self.collectionView.pagingEnabled = NO;
        self.collectionView.showsVerticalScrollIndicator = NO;
        self.collectionView.showsHorizontalScrollIndicator = NO;
        [self.collectionView registerNib:[UINib nibWithNibName:@"ShoesCollectionCell" bundle:[NSBundle mainBundle]] forCellWithReuseIdentifier:@"ShoesCollectionCell"];
        self.collectionView.backgroundColor = [UIColor whiteColor];
        [self addSubview:self.collectionView];
        self.collectionView.backgroundColor = [UIColor clearColor];
    }
    
}

-(NSMutableArray *)modelArray{
    
    if (!_modelArray){
        _modelArray = [[NSMutableArray alloc]init];
    }
    return _modelArray;
    
}

@end