yunjingAndroid/ybvideoandroid/ybvideoios/YBVideo/功能/极光消息/External/HMPhotoPicker/View/JCHATPhotoBrowserCollectionViewCell.m

//
//  HMPhotoBrowserCollectionViewCell.m
//  photosFramework
//
//  Created by HuminiOS on 15/11/12.
//  Copyright © 2015年 HuminiOS. All rights reserved.
//

#import "JCHATPhotoBrowserCollectionViewCell.h"

@interface JCHATPhotoBrowserCollectionViewCell ()<UIScrollViewDelegate>
@property (strong, nonatomic)JCHATPhotoModel *photoModel;
@property (strong, nonatomic)UIImageView *largeImage;
@end

@implementation JCHATPhotoBrowserCollectionViewCell

- (void)awakeFromNib {
    [super awakeFromNib];
    // Initialization code
  _largeImage = [UIImageView new];
  _largeImage.contentMode = UIViewContentModeScaleAspectFit;
  [_imageContent addSubview:_largeImage];
  self.backgroundColor = [UIColor blackColor];
  
  self.userInteractionEnabled = YES;
  _imageContent.userInteractionEnabled = YES;
  _imageContent.delegate = self;
  _imageContent.maximumZoomScale = 2.0;
  _imageContent.minimumZoomScale = 1;
  _imageContent.decelerationRate = UIScrollViewDecelerationRateFast;
  _imageContent.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
  _imageContent.scrollEnabled = YES;
  
  _largeImage.userInteractionEnabled = YES;
//  [self addGestureRecognizer:[[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinAction:)]];
//  
//  [self addGestureRecognizer:[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapAction:)]];

  UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapPhotoAction:)];
  tap.numberOfTapsRequired = 2;
  [_imageContent addGestureRecognizer:tap];

}

- (void)pinAction:(UIPinchGestureRecognizer *)pin{
//  if ((pin.state == UIGestureRecognizerStateEnded
//       || pin.state == UIGestureRecognizerStateCancelled
//       || pin.state == UIGestureRecognizerStateFailed)
//      && _largeImage.width < self.width){
//    [UIView animateWithDuration:0.2 animations:^{
//      _largeImage.transform = CGAffineTransformIdentity;
//      _imageContent.contentSize = _largeImage.frame.size;
//      self.photo_imageView.x = 0;
//      self.photo_imageView.y = 0;
//      self.bgScrollView.contentOffset = CGPointZero;
//    }];
//    return;
//  }else if (pin.state == UIGestureRecognizerStateChanged){
//    if (self.animating) return;
//    
//    self.photo_imageView.transform = CGAffineTransformScale(self.photo_imageView.transform, pin.scale, pin.scale);
//    self.bgScrollView.contentSize = self.photo_imageView.frame.size;
//    
//    self.bgScrollView.contentOffset = CGPointMake(self.bgScrollView.contentOffset.x - self.photo_imageView.x , self.bgScrollView.contentOffset.y - self.photo_imageView.y);
//    
//    self.photo_imageView.centerX = self.bgScrollView.contentOffset.x + self.bgScrollView.width / 2.0;
//    self.photo_imageView.centerY = self.bgScrollView.contentOffset.y + self.bgScrollView.height / 2.0;
  
    //        CGPoint point = [pin locationInView:pin.view];
    //        CGFloat scale = self.photo_imageView.width / self.bgScrollView.width;
    //        if (scale > 3 || scale < 0.5){
    //            self.animating = YES;
    //            CGFloat reScale = scale > 1 ? 1.5 : 0.8 ;
    //            [UIView animateWithDuration:0.5 animations:^{
    //                self.photo_imageView.transform = CGAffineTransformScale(self.photo_imageView.transform, 1.0 / scale * reScale, 1.0 / scale * reScale );
    //                self.bgScrollView.contentSize = self.photo_imageView.frame.size;
    //
    //                self.bgScrollView.contentOffset = CGPointMake(self.bgScrollView.contentOffset.x - self.photo_imageView.x , self.bgScrollView.contentOffset.y - self.photo_imageView.y);
    //
    //                self.photo_imageView.centerX = self.bgScrollView.contentOffset.x + self.bgScrollView.width / 2.0;
    //                self.photo_imageView.centerY = self.bgScrollView.contentOffset.y + self.bgScrollView.height / 2.0;
    //            }completion:^(BOOL finished) {
    //                self.animating = NO;
    //            }];
    //        }else{
    //
    //        }
//  }
//  
//  pin.scale  = 1.0;
}

- (void)tapAction:(UITapGestureRecognizer *)tap{

  
}

- (void)tapPhotoAction:(UITapGestureRecognizer *)tap{
  [UIView animateWithDuration:0.4 animations:^{
    _largeImage.transform = CGAffineTransformIdentity;
    _imageContent.contentSize = _largeImage.frame.size;

    _imageContent.contentOffset = CGPointZero;
  }];
  
}


- (void)setDataWithModel:(JCHATPhotoModel *)model {
  _photoModel = model;
  PHAsset *asset = model.photoAsset;
  _imageContent.frame = self.bounds;
  _imageContent.contentSize = self.frame.size;
  _largeImage.frame = _imageContent.bounds;
  _largeImage.transform = CGAffineTransformIdentity;
  if (model.asset == nil) {
    CGFloat scale = [UIScreen mainScreen].scale;
    CGSize imageSize = CGSizeMake(self.frame.size.width * scale, self.frame.size.width * scale);
    [model.cachingManager requestImageForAsset:asset
                                    targetSize:imageSize
                                   contentMode:PHImageContentModeAspectFill
                                       options:nil
                                 resultHandler:^(UIImage *result, NSDictionary *info) {
                                   if ([_photoModel.photoAsset.localIdentifier isEqualToString:asset.localIdentifier]) {
                                     _largeImage.image = result;
                                   }
                                 }];
  } else {
    [[[ALAssetsLibrary alloc] init] assetForURL:model.imgURL resultBlock:^(ALAsset *asset)  {
      
      _largeImage.image = [UIImage imageWithCGImage:[[asset defaultRepresentation] fullScreenImage]];
      
    }failureBlock:^(NSError *error) {
      NSLog(@"error=%@",error);
    }];
  }
}

#pragma mark - scrollViewDelegate

- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView {
  
  return _largeImage;
}


- (void)scrollViewDidZoom:(UIScrollView *)scrollView
{
  CGFloat offsetX = (scrollView.bounds.size.width > scrollView.contentSize.width)?
  (scrollView.bounds.size.width - scrollView.contentSize.width) * 0.5 : 0.0;
  CGFloat offsetY = (scrollView.bounds.size.height > scrollView.contentSize.height)?
  (scrollView.bounds.size.height - scrollView.contentSize.height) * 0.5 : 0.0;
  _largeImage.center = CGPointMake(scrollView.contentSize.width * 0.5 + offsetX,
                                  scrollView.contentSize.height * 0.5 + offsetY);
}

@end