wodeshebao-iOS/我的社保/Public/Manager/SelectSinglePhoto/SPSBSelectSinglePhotoViewController.m

//
//  SPSBSelectSinglePhotoViewController.m
//  我的社保
//
//  Created by shanp on 2021/5/13.
//

#import "SPSBSelectSinglePhotoViewController.h"
#import "SPSBUIGeneralHeader.h"
#import "UIViewController+SPSBInitialization.h"
#import <NSObject+JXHNotification.h>

#define WIDTH jxh_screenWidth()
#define HEIGHT (jxh_screenHeight() - jxh_safeInsets(spsb_keyWindow()).bottom)

NSNotificationName const SPSBReopenCameraNotification = @"SPSBReopenCameraNotification";

@interface SPSBSelectSinglePhotoViewController ()<UIScrollViewDelegate> {
    void(^_passValue)(NSValue *value);
    UIScrollView *_backgroundScrollView;
    CGFloat _showHeight;
    UIImageView *_imageView;
    __weak UINavigationController *_self_nav;
}

@end

@implementation SPSBSelectSinglePhotoViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    [self setupUI];
}

- (void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:animated];
    //取消滑动手势返回
    _self_nav = self.navigationController;
    self.navigationController.interactivePopGestureRecognizer.enabled = false;
}

- (void)viewDidDisappear:(BOOL)animated {
    [super viewDidDisappear:animated];
    //启动滑动手势返回
    _self_nav.interactivePopGestureRecognizer.enabled = true;
}

- (BOOL)prefersStatusBarHidden {
    return true;
}

#pragma mark - Action
- (void)buttonAction:(UIButton *)sender {
    if (sender.tag == 2002) {
        CGRect rect;
        if (_spsb_proportion >= 0.5) {
            CGFloat f = jxh_viewWidth(_imageView) / _spsb_dataImage.size.width;
            if (_spsb_dataImage.size.height >= _spsb_dataImage.size.width) {
                rect = CGRectMake(_backgroundScrollView.contentOffset.x / f, _backgroundScrollView.contentOffset.y / f + _backgroundScrollView.contentInset.top / f, WIDTH / f, WIDTH / _spsb_proportion / f);
            } else {
                CGFloat h = _imageView.frame.size.width / _spsb_dataImage.size.width * _spsb_dataImage.size.height;
                if (h <= WIDTH / _spsb_proportion) {
                    rect = CGRectMake(_backgroundScrollView.contentOffset.x / f, 0, WIDTH / f, h / f);
                } else {
                    rect = CGRectMake(_backgroundScrollView.contentOffset.x / f, _backgroundScrollView.contentOffset.y / f + _backgroundScrollView.contentInset.top / f, WIDTH / f, WIDTH / _spsb_proportion / f);
                }
            }
        } else {
            rect = CGRectMake(0, 0, _spsb_dataImage.size.width, _spsb_dataImage.size.height);
        }
        //加快界面过度，防止图片的处理工作导致界面停顿，先发数据，界面消息后再处理数据
        _passValue([NSValue valueWithCGRect:rect]);
        if (_spsb_needToDismiss) {
            [self.navigationController.viewControllers[0] dismissViewControllerAnimated:true completion:^{
                self->_passValue(nil);
            }];
        }
    } else {
        UIImagePickerController *imagePicker = (UIImagePickerController *)self.navigationController;
        if (imagePicker.sourceType == UIImagePickerControllerSourceTypeCamera) {
            [self.navigationController.viewControllers[0] dismissViewControllerAnimated:false completion:^{
                jxh_postNotification(SPSBReopenCameraNotification, nil, nil);
            }];
        } else {
            [self.navigationController popViewControllerAnimated:true];
        }
    }
}

- (void)passValue:(void(^)(NSValue *value))value {
    _passValue = value;
}

#pragma mark - Network Action
#pragma mark - UIScrollViewDelegate
- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView {
    return _imageView;
}

- (void)scrollViewDidEndZooming:(UIScrollView *)scrollView withView:(UIView *)view atScale:(CGFloat)scale {
    CGFloat spsb_proportion = _spsb_proportion;
    if (spsb_proportion <= 0.5) {
        spsb_proportion = WIDTH / HEIGHT;
    }
    if (_spsb_dataImage.size.height >= _spsb_dataImage.size.width) {
        scrollView.contentInset = UIEdgeInsetsMake(- (HEIGHT - WIDTH / spsb_proportion) / 2 * (scale - 1), 0, - (HEIGHT - WIDTH / spsb_proportion) / 2 * (scale - 1), 0);
    } else {
        CGFloat h = _imageView.frame.size.width / _spsb_dataImage.size.width * _spsb_dataImage.size.height;
        if (h <= WIDTH / spsb_proportion) {
            scrollView.contentInset = UIEdgeInsetsMake(- (jxh_viewHeight(_imageView) - HEIGHT) / 2, 0, - (jxh_viewHeight(_imageView) - HEIGHT) / 2, 0);
        } else {
            CGFloat h = WIDTH / _spsb_dataImage.size.width * _spsb_dataImage.size.height;
            CGFloat c = (WIDTH / spsb_proportion - h) / 2 * scale;
            scrollView.contentInset = UIEdgeInsetsMake(- (HEIGHT - WIDTH / spsb_proportion) / 2 * (scale - 1) - c, 0, - (HEIGHT - WIDTH / spsb_proportion) / 2 * (scale - 1) - c, 0);
        }
        
    }
}

- (void)scrollViewDidZoom:(UIScrollView *)scrollView {
    CGSize boundsSize = scrollView.bounds.size, contentSize = scrollView.contentSize;
    CGFloat offsetX = (boundsSize.width > contentSize.width) ? (boundsSize.width - contentSize.width) / 2 : 0.0;
    _imageView.center = CGPointMake(contentSize.width / 2 + offsetX, _imageView.center.y);
}

#pragma mark - UI
- (void)setupUI {
    self.spsb_isHiddenNavigationBar = true;
    self.view.backgroundColor = spsb_000000_color(1.f);
    self.automaticallyAdjustsScrollViewInsets = true;
    [self addImageView];
    [self addSelectMenuView];
    if (_spsb_proportion > 0.1) {
        [self addSelectAreaView];
    }
}

- (void)addImageView {
    _backgroundScrollView = [[UIScrollView alloc] init];
    _backgroundScrollView.delegate = self;
    _backgroundScrollView.showsHorizontalScrollIndicator = false;
    _backgroundScrollView.showsVerticalScrollIndicator = false;
    _backgroundScrollView.maximumZoomScale = 2.0;
    _backgroundScrollView.minimumZoomScale = 1.0;
    if (@available(iOS 11.0, *)) {
        _backgroundScrollView.contentInsetAdjustmentBehavior = UIScrollViewContentInsetAdjustmentNever;
    }
    [self.view addSubview:_backgroundScrollView];
    [_backgroundScrollView makeConstraints:^(JXHConstraintMaker *make) {
        make.top.and.leading.and.trailing.equalTo(0);
        make.bottom.equalTo(self.view.safebottom);
    }];
    _imageView = [[UIImageView alloc] initWithImage:_spsb_dataImage];
    _imageView.contentMode = UIViewContentModeScaleAspectFit;
    [_backgroundScrollView addSubview:_imageView];
    _showHeight = WIDTH / _spsb_dataImage.size.width * _spsb_dataImage.size.height;
    if (_spsb_proportion > 0.5) {
        if (_spsb_dataImage.size.height >= _spsb_dataImage.size.width) {
            [_imageView makeConstraints:^(JXHConstraintMaker *make) {
                make.edges.equalTo(UIEdgeInsetsMake(0, 0, 0, 0));
                make.size.equalTo(CGSizeMake(WIDTH, self->_showHeight + HEIGHT - WIDTH / self->_spsb_proportion));
            }];
        } else {
            CGFloat c = (WIDTH / _spsb_proportion - _showHeight) * _backgroundScrollView.zoomScale;
            [_imageView makeConstraints:^(JXHConstraintMaker *make) {
                make.edges.equalTo(UIEdgeInsetsMake(0, 0, 0, 0));
                make.size.equalTo(CGSizeMake(WIDTH, self->_showHeight + c + HEIGHT - WIDTH / self->_spsb_proportion));
            }];
        }
    } else {
        [_imageView makeConstraints:^(JXHConstraintMaker *make) {
            make.edges.equalTo(UIEdgeInsetsMake(0, 0, 0, 0));
            make.size.equalTo(CGSizeMake(WIDTH, HEIGHT));
        }];
    }
}

- (void)addSelectAreaView {
    UIView *view = [[UIView alloc] init];
    view.userInteractionEnabled = false;
    [self.view addSubview:view];
    
    [view makeConstraints:^(JXHConstraintMaker *make) {
        make.size.equalTo(CGSizeMake(WIDTH - jxh_onePixe() * 2, WIDTH / self->_spsb_proportion - jxh_onePixe() * 2));
        make.center.equalTo(CGPointMake(0, -jxh_safeInsets(spsb_keyWindow()).bottom / 2));
    }];
    [view setLayerBorderWidth:jxh_onePixe() * 2  borderColor:spsb_FFFFFF_color(1.f)];
}

- (void)addSelectMenuView {
    UIView *menuView = [[UIView alloc] init];
    menuView.backgroundColor = spsb_666666_5_color();
    [self.view addSubview:menuView];
    [menuView makeConstraints:^(JXHConstraintMaker *make) {
        make.leading.and.trailing.equalTo(0);
        make.bottom.equalTo(self.view.safebottom);
        make.height.equalTo(60);
    }];
    NSArray *titleArray = @[@"取消", @"选取"];
    for (NSInteger i = 0; i < 2; i ++) {
        UIButton *button = [UIButton convenienceWithFont:spsb_font(15) target:self action:@selector(buttonAction:)];
        [button setTitle:titleArray[i] titleColor:spsb_FFFFFF_color(1.f) state:JXHButtonControlStateNormal];
        button.tag = 2001 + i;
        [menuView addSubview:button];
        [button makeConstraints:^(JXHConstraintMaker *make) {
            if (i == 0) {
                make.leading.equalTo(0);
            } else {
                make.trailing.equalTo(0);
            }
            make.top.and.bottom.equalTo(0);
            make.width.equalTo(60);
        }];
    }
}

@end