//
// SCVisitorInputAccessoryView.m
// 訪客通行錄入頁面--訪客姓名輸入歷史的InputAccessory

#import "SCInputAccessoryView.h"
#import "SCInputAccessoryCell.h"

#define SCHorizontalMargin 15.0f
#define SCVerticalMargin 10.0f

@interface SCInputAccessoryView () <UICollectionViewDelegate, UICollectionViewDataSource,UICollectionViewDelegateFlowLayout>

@property (weak, nonatomic) IBOutlet UICollectionView *collectionView;

/// 名字記錄的數(shù)組
@property (nonatomic, strong) NSMutableArray *nameArray;

@end


@implementation SCInputAccessoryView

+ (instancetype)loadNibView {
 return [[[NSBundle mainBundle] loadNibNamed:[SCInputAccessoryView className] owner:self options:nil] objectAtIndex:0];
}

- (void)awakeFromNib {
 [super awakeFromNib];
 self.clipsToBounds = YES;
 self.collectionView.delegate = self;
 self.collectionView.dataSource = self;
 [self setupView];
}

- (void)setupView {

 /// 設(shè)置此屬性為yes 不滿一屏幕 也能滾動(dòng)
 self.collectionView.alwaysBounceHorizontal = YES;
 self.collectionView.showsHorizontalScrollIndicator = NO;
 // 1.創(chuàng)建流水布局
 UICollectionViewFlowLayout *layout = [[UICollectionViewFlowLayout alloc] init];
 layout.scrollDirection = UICollectionViewScrollDirectionHorizontal;
 self.collectionView.collectionViewLayout = layout;
 [self registerNibWithTableView];
}

#pragma mark - 代理方法 Delegate Methods
// 設(shè)置分區(qū)

- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView {
 return 1;
}

// 每個(gè)分區(qū)上得元素個(gè)數(shù)
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {
 return self.nameArray.count;
}

// 設(shè)置cell
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {

 SCInputAccessoryCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:NSStringFromClass([SCInputAccessoryCell class]) forIndexPath:indexPath];
 [cell refreshCellWithTitle:self.nameArray[indexPath.row]];
 return cell;
}

// 設(shè)置cell大小 itemSize：可以給每一個(gè)cell指定不同的尺寸
- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath {
 CGFloat height = 35.0f;
 CGFloat width = [self gainStringWidthWithString:self.nameArray[indexPath.row] font:15.0f height:height];
 return CGSizeMake(width, height);
}


// 設(shè)置UIcollectionView整體的內(nèi)邊距（這樣item不貼邊顯示）
- (UIEdgeInsets)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout insetForSectionAtIndex:(NSInteger)section {
 // 上 左 下 右
 return UIEdgeInsetsMake(SCVerticalMargin, SCHorizontalMargin, SCVerticalMargin, SCHorizontalMargin);
}

// 設(shè)置minimumLineSpacing：cell上下之間最小的距離
- (CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout minimumLineSpacingForSectionAtIndex:(NSInteger)section {
 return SCHorizontalMargin;
}

// 設(shè)置minimumInteritemSpacing：cell左右之間最小的距離
- (CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout minimumInteritemSpacingForSectionAtIndex:(NSInteger)section {
 return SCHorizontalMargin;
}

// 選中cell的回調(diào)
- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath {
 if (self.selectRowBlock) {
 self.selectRowBlock(indexPath.row, self.nameArray[indexPath.row]);
 }
}

#pragma mark - 對外方法 Public Methods
/// array數(shù)組里面放的元素 必須字符串類型的
- (void)refreshUIWithNameArray:(NSArray<NSString *> *)array {
 [self.nameArray removeAllObjects];
 [self.nameArray addObjectsFromArray:array];
 [self.collectionView reloadData];
}


#pragma mark - 內(nèi)部方法 Private Methods
// 注冊cell
- (void)registerNibWithTableView {
 [self.collectionView registerNib:[UINib nibWithNibName:[SCInputAccessoryCell className] bundle:nil] forCellWithReuseIdentifier:NSStringFromClass([SCInputAccessoryCell class])];
}

- (CGFloat)gainStringWidthWithString:(NSString *)string font:(CGFloat)font height:(CGFloat)height {

 if (string.length == 0) {
 return 0.0f;
 }

 CGSize maxSize = CGSizeMake(MAXFLOAT, height);
 CGSize realSize = [string boundingRectWithSize:maxSize
   options:NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading
   attributes:@{NSFontAttributeName:[UIFont systemFontOfSize:font]}
   context:nil].size;
 /// 左右各16
 return (realSize.width + 2 * (SCHorizontalMargin + 1.f));
}

#pragma mark - 點(diǎn)擊/觸碰事件 Action Methods

#pragma mark - 懶加載 Lazy Load

- (NSMutableArray *)nameArray {
 if (!_nameArray) {
 _nameArray = [NSMutableArray arrayWithCapacity:0];
 }
 return _nameArray;
}

@end