JSJP_School/LN_School/PhotosUploadViewController.m

//
//  PhotosUploadViewController.m
//  LN_School
//
//  Created by 张嵘 on 2018/10/10.
//  Copyright © 2018 Danson. All rights reserved.
//

#import "PhotosUploadViewController.h"
#import "PureCamera.h"
#import "PhotosUploadCell.h"
typedef void (^UploadImageBlock) (NSArray *imgPathArr);

typedef NS_ENUM(NSInteger, EditImgType) {
    EditImgType_Add = 0,
    EditImgType_Replace,
};

@interface PhotosUploadViewController () <UICollectionViewDelegate, UICollectionViewDataSource, UIGestureRecognizerDelegate, UIScrollViewDelegate>
@property (nonatomic, strong) ReturnImagesBlock returnImagesBlock;
@property (nonatomic, strong) NSMutableArray *imagesArr;
@property (nonatomic, strong) NSMutableArray *imagesPathArr;
@property (nonatomic, strong) UILabel *pictureNumberLabel;
@property (nonatomic, assign) CGFloat itemWith;
@property (nonatomic, assign) EditImgType editImgType;
@property (nonatomic, assign) NSInteger currentTag;
@end

static NSString *collectionIdentifer = @"PhotosUploadCell";
@implementation PhotosUploadViewController

- (instancetype)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil imagesArr:(NSArray *)imagesArr imagesPathArr:(NSArray *)imagesPathArr returnImagesBlock:(ReturnImagesBlock)returnImagesBlock {
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        _returnImagesBlock = returnImagesBlock;
		if (imagesArr) {
			self.imagesArr = [NSMutableArray arrayWithArray:imagesArr];
		}else {
			self.imagesArr = [NSMutableArray array];
		}
		if (imagesPathArr) {
			self.imagesPathArr = [NSMutableArray arrayWithArray:imagesPathArr];
		}else {
			self.imagesPathArr = [NSMutableArray array];
		}
    }
    return self;
}

- (void)viewDidLoad {
    [super viewDidLoad];
    self.title = @"图片上传";
    self.view.backgroundColor = KBackGroundColor;
    [self goBackByNavigation];
    [self initCollectView];
    [self.view addSubview:self.pictureNumberLabel];
    [self reactiveObjCBind];
}
//返回按钮点击事件
- (void)goBackByNav {
    if (_imagesArr.count > 0) {
		[RQ_SHARE_FUNCTION showAlertWithTitle:@"是否保存当前图片" message:nil alertControllerStyle:UIAlertControllerStyleAlert cancelButtonTitle:@"取消" otherButtonTitles:@[@"确定"] otherButtonStyles:nil completion:^(NSUInteger selectedOtherButtonIndex) {
			if (selectedOtherButtonIndex == 0) {
				if (_returnImagesBlock) {
					_returnImagesBlock(_imagesArr, self.imagesPathArr);
				}
				[self.view endEditing:1];
				[self.navigationController popViewControllerAnimated:YES];
			}else if (selectedOtherButtonIndex == NSNotFound) {
				[self.view endEditing:1];
				[self.navigationController popViewControllerAnimated:YES];
			}
		}];
    }else {
        [self.view endEditing:1];
        [self.navigationController popViewControllerAnimated:YES];
    }
}

#pragma mark - UICollectionViewDataSource
- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView {
    return 1;
}

- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {
    return self.imagesArr.count + 1;
}

- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
    PhotosUploadCell* cell = [collectionView dequeueReusableCellWithReuseIdentifier:collectionIdentifer forIndexPath:indexPath];
    if (cell==nil) {
        cell = [[[NSBundle mainBundle] loadNibNamed:@"PhotosUploadCell" owner:nil options:nil] lastObject];
    }
    cell.deleteBtn.hidden = YES;
    if (indexPath.row == self.imagesArr.count) {
        [cell.bgImg setImage:[UIImage imageNamed:@"AddImage"]];
    }else{
//		[cell.bgImg sd_setImageWithURL:[NSURL URLWithString:self.imagesArr[indexPath.row]] placeholderImage:[UIImage imageNamed:@"AddImage"]];
		cell.bgImg.image = self.imagesArr[indexPath.row];
		cell.deleteBtn.tag = 1000 + indexPath.row;
		cell.deleteBtn.hidden = NO;
		[cell.deleteBtn addTarget:self action:@selector(removeAction:) forControlEvents:UIControlEventTouchUpInside];
    }
    return cell;
}

#pragma mark - UICollectionViewDelegate
- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath {
    if (indexPath.row == self.imagesArr.count) {
        //添加
		if (self.imagesArr.count >= 6) {
			ShowMsg(@"最多选择6张图片");
			return;
		}
        [self takePhotoWithTag:indexPath.row editImgType:EditImgType_Add];
    }else{
        //替换
        [self takePhotoWithTag:indexPath.row editImgType:EditImgType_Replace];
    }
}


#pragma mark - Custom Way
//绑定监听数组内容信号
- (void)reactiveObjCBind {
    [RACObserve(self, imagesArr) subscribeNext:^(id  _Nullable x) {
        NSArray *arr = x;
        _pictureNumberLabel.text = [NSString stringWithFormat:@"添加图片%lu/6    ",(unsigned long)arr.count];
        [self.collectView reloadData];
    }];
}
//保存按钮点击事件
- (IBAction)saveBtnAction:(id)sender {
    if (_imagesArr.count > 0) {
		[RQ_SHARE_FUNCTION showAlertWithTitle:@"保存图片并返回上一页" message:nil alertControllerStyle:UIAlertControllerStyleAlert cancelButtonTitle:@"取消" otherButtonTitles:@[@"确认"] otherButtonStyles:nil completion:^(NSUInteger selectedOtherButtonIndex) {
			if (selectedOtherButtonIndex == 0) {
				if (_returnImagesBlock) {
					_returnImagesBlock(_imagesArr, self.imagesPathArr);
				}
				[self.view endEditing:1];
				[self.navigationController popViewControllerAnimated:YES];
			}
		}];
    }else {
        ShowMsg(@"请上传图片");
    }
    
}
//移除图片
- (void)removeAction:(UIButton*)sender {
	[RQ_SHARE_FUNCTION showAlertWithTitle:@"是否删除这张图片" message:nil alertControllerStyle:UIAlertControllerStyleAlert cancelButtonTitle:@"取消" otherButtonTitles:@[@"确认"] otherButtonStyles:nil completion:^(NSUInteger selectedOtherButtonIndex) {
		if (selectedOtherButtonIndex == 0) {
			[[self mutableArrayValueForKey:@"imagesArr"] removeObjectAtIndex:sender.tag - 1000];
			[[self mutableArrayValueForKey:@"imagesPathArr"] removeObjectAtIndex:sender.tag - 1000];
		}
	}];
}
//collecViews设置
- (void)initCollectView {
    _itemWith = kScreenWidth / 4;
    UICollectionViewFlowLayout *layout = [[UICollectionViewFlowLayout alloc] init];
    layout.itemSize = CGSizeMake(_itemWith - 10, _itemWith - 10);
    layout.minimumLineSpacing = 10;
    layout.minimumInteritemSpacing = 0;
    layout.sectionInset = UIEdgeInsetsMake(23, 10, 0, 10);//上左下右
    [self.collectView setCollectionViewLayout:layout];
    [self.collectView registerNib:[UINib nibWithNibName:collectionIdentifer bundle:nil] forCellWithReuseIdentifier:collectionIdentifer];
    _collectView.backgroundColor = [UIColor colorWithRed:1.0 green:1.0 blue:1.0 alpha:1.00];
}

- (void)takePhotoWithTag:(NSInteger)tag editImgType:(EditImgType)editImgType { //100*120
	self.currentTag = tag;
	self.editImgType = editImgType;
	[RQ_SHARE_FUNCTION showAlertWithTitle:@"请选择获取图片方式" message:nil alertControllerStyle:UIAlertControllerStyleActionSheet cancelButtonTitle:@"取消" otherButtonTitles:@[@"拍照", @"本地照片"] otherButtonStyles:nil completion:^(NSUInteger selectedOtherButtonIndex) {
		if (selectedOtherButtonIndex == 0) {
			[RQ_SHARE_FUNCTION getPhotosWithGetPhotosWay:GetPhotosWay_Camera size:CGSizeZero maxLength:100 maxImagesCount:1 photosBlock:^(NSArray * _Nonnull imagesArr, NSArray * _Nonnull imagesDataStrArr) {
				[self uploadHeadImg:imagesDataStrArr completeBlock:^(NSArray *imgPathArr) {
					if (editImgType == EditImgType_Add) {
						for (UIImage *image in imagesArr) {
							[[self mutableArrayValueForKey:@"imagesArr"] addObject:image];
						}
						for (NSString *imgPath in imgPathArr) {
							[[self mutableArrayValueForKey:@"imagesPathArr"] addObject:imgPath];
						}
					}else if (editImgType == EditImgType_Replace && imgPathArr.count > 0) {
						[[self mutableArrayValueForKey:@"imagesArr"] replaceObjectAtIndex:tag withObject:imagesArr[0]];
						[[self mutableArrayValueForKey:@"imagesPathArr"] replaceObjectAtIndex:tag withObject:imgPathArr[0]];
					}
					
				}];
			}];
		}else if (selectedOtherButtonIndex == 1) {
			[RQ_SHARE_FUNCTION getPhotosWithGetPhotosWay:GetPhotosWay_Album size:CGSizeZero maxLength:100 maxImagesCount:editImgType == EditImgType_Replace? 1 : 6 photosBlock:^(NSArray * _Nonnull imagesArr, NSArray * _Nonnull imagesDataStrArr) {
				[self uploadHeadImg:imagesDataStrArr completeBlock:^(NSArray *imgPathArr) {
					if (editImgType == EditImgType_Add) {
						for (UIImage *image in imagesArr) {
							[[self mutableArrayValueForKey:@"imagesArr"] addObject:image];
						}
						for (NSString *imgPath in imgPathArr) {
							[[self mutableArrayValueForKey:@"imagesPathArr"] addObject:imgPath];
						}
					}else if (editImgType == EditImgType_Replace && imgPathArr.count > 0) {
						[[self mutableArrayValueForKey:@"imagesArr"] replaceObjectAtIndex:tag withObject:imagesArr[0]];
						[[self mutableArrayValueForKey:@"imagesPathArr"] replaceObjectAtIndex:tag withObject:imgPathArr[0]];
					}
				}];
			}];
		}
	}];
}

#pragma mark - Request Data
- (void)uploadHeadImg:(NSArray *)imageArr completeBlock:(UploadImageBlock)uploadImageBlock {
    if (![NetManager connectedToNetWork]) {
        showMsgUnconnect();
        return;
    }
	//@RQ-MARK 1.0.2修改:“学员报名”模块新增 协议上传(上传多张)
	NSMutableDictionary *dic = [NSMutableDictionary dictionary];
	[dic setObject:imageArr.count > 1? [imageArr componentsJoinedByString:@","] : imageArr[0] forKey:@"content"];
	NSString *method = @"uploadStuProtocol";
	[NetManager requestAnythingWithURL:method dictionary:dic dataArray:nil completion:^(NSDictionary *root) {
		if (!root) {
			[self showUPloadImgAlertWithImg:imageArr];
			return;
		}
		if ([root[@"code"] isEqualToString:@"1"]) {
			ShowMsg(root[@"msg"]);
			[self showUPloadImgAlertWithImg:imageArr];
			return;
		}
		//上传成功
		if (uploadImageBlock && root[@"body"]) {
			if ([root[@"body"] containsString:@","]) {
				uploadImageBlock([root[@"body"] componentsSeparatedByString:@","]);
			}else {
				uploadImageBlock(@[root[@"body"]]);
			}
		}
	}];
	
	
}

- (void)showUPloadImgAlertWithImg:(NSArray *)imageArr {
	__block NSArray *arr = imageArr;
	[RQ_SHARE_FUNCTION showAlertWithTitle:@"图片上传失败!" message:nil alertControllerStyle:UIAlertControllerStyleAlert cancelButtonTitle:@"取消" otherButtonTitles:@[@"再试一次"] otherButtonStyles:nil completion:^(NSUInteger selectedOtherButtonIndex) {
		if (selectedOtherButtonIndex == 0) {
			[self uploadHeadImg:arr completeBlock:^(NSArray *imgPathArr) {
				if (self.editImgType == EditImgType_Add) {
					for (UIImage *image in arr) {
						[[self mutableArrayValueForKey:@"imagesArr"] addObject:image];
					}
					for (NSString *imgPath in imgPathArr) {
						[[self mutableArrayValueForKey:@"imagesPathArr"] addObject:imgPath];
					}
				}else if (self.editImgType == EditImgType_Replace && imgPathArr.count > 0) {
					[[self mutableArrayValueForKey:@"imagesArr"] replaceObjectAtIndex:self.currentTag withObject:arr[0]];
					[[self mutableArrayValueForKey:@"imagesPathArr"] replaceObjectAtIndex:self.currentTag withObject:imgPathArr[0]];
				}

			}];
		}
	}];
	
}


#pragma mark - Lazy Loading
- (UILabel *)pictureNumberLabel {
    if (!_pictureNumberLabel) {
        _pictureNumberLabel = [[UILabel alloc]init];
        _pictureNumberLabel.backgroundColor = [UIColor clearColor];
        _pictureNumberLabel.textAlignment = NSTextAlignmentLeft;
        _pictureNumberLabel.font = [UIFont boldSystemFontOfSize:12];
        _pictureNumberLabel.textColor = [UIColor colorWithRed:153.0/255.0 green:153.0/255.0 blue:153.0/255.0 alpha:1.0];
        _pictureNumberLabel.backgroundColor = [UIColor whiteColor];
        _pictureNumberLabel.frame = CGRectMake(10, 3, kScreenWidth - 10, 15);
    }
    return _pictureNumberLabel;
}

@end