JSJP_School/LN_School/RQShareFunction.m

//
//  RQShareFunction.m
//  LN_School
//
//  Created by 张嵘 on 2018/10/16.
//  Copyright © 2018 Danson. All rights reserved.
//

#import "RQShareFunction.h"
#import "PureCamera.h"//第三方相机
#import "TZImagePickerController.h"//第三方相册

static RQShareFunction *_instance = nil;
static dispatch_once_t onceToken;

@implementation RQShareFunction

+ (instancetype)shareManager {
	return [[self alloc] init];
}

- (instancetype)init{
	dispatch_once(&onceToken, ^{
		_instance = [super init];
	});
	return _instance;
}

#pragma mark - GetPhotos
- (void)getPhotosWithGetPhotosWay:(GetPhotosWay)getPhotosWay size:(CGSize)size maxLength:(NSUInteger)maxLength maxImagesCount:(NSUInteger)maxImagesCount photosBlock:(PhotosBlock)photosBlock {
	if (getPhotosWay == GetPhotosWay_Camera) {
		if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
			PureCamera *homec = [[PureCamera alloc] init];
			homec.fininshcapture = ^(UIImage *photo) {
				if (photo) {
					NSMutableArray *imagesArr = [NSMutableArray arrayWithObject:photo];
					NSData *data;
					if (CGSizeEqualToSize(size, CGSizeZero)) {
						data = [self compressQualityWithImage:photo MaxLength:maxLength];
					}else {
						data = [self compressQualityWithImage:[photo scaledAndCutToSize:size] MaxLength:maxLength];
					}
					NSString *imgString = [data base64EncodedStringWithOptions:NSDataBase64Encoding64CharacterLineLength];
					NSMutableArray *imagesDataStrArr = [NSMutableArray arrayWithObject:imgString];
					if (photosBlock) {
						photosBlock(imagesArr, imagesDataStrArr);
					}
				}
			};
			
			[[RQ_SHARE_FUNCTION getCurrentVC] presentViewController:homec
							   animated:NO
							 completion:nil];
			
		} else {
			NSLog(@"相机调用失败");
		}
	}else if (getPhotosWay == GetPhotosWay_Album) {
		if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeSavedPhotosAlbum]) {
			TZImagePickerController *imagePickerVc = [[TZImagePickerController alloc] initWithMaxImagesCount:maxImagesCount ? maxImagesCount : 1 delegate:nil];
			imagePickerVc.naviBgColor = RQMianColor;
			imagePickerVc.iconThemeColor = RQMianColor;
			imagePickerVc.allowPickingVideo = NO;
			[imagePickerVc setDidFinishPickingPhotosHandle:^(NSArray<UIImage *> *photos, NSArray *assets, BOOL isStop) {
				
				NSMutableArray *imagesDataStrArr = [NSMutableArray array];
				@synchronized (imagesDataStrArr) {
					for (UIImage *image in photos) {
						NSData *data;
						if (CGSizeEqualToSize(size, CGSizeZero)) {
							data = [self compressQualityWithImage:image MaxLength:maxLength];
						}else {
							data = [self compressQualityWithImage:[image scaledAndCutToSize:size] MaxLength:maxLength];
						}
						NSString *imgString = [data base64EncodedStringWithOptions:NSDataBase64Encoding64CharacterLineLength];
						[imagesDataStrArr addObject:imgString];
					}
				}
				if (photosBlock) {
					photosBlock(photos, imagesDataStrArr);
				}
			}];
			[[RQ_SHARE_FUNCTION getCurrentVC] presentViewController:imagePickerVc animated:YES completion:nil];
		}else{
			
			NSLog(@"相册调用失败");
		}
	}
}

#pragma mark - RQAlertViewController
- (void)showAlertAtViewController:(nonnull UIViewController *)viewController
						WithTitle:(nullable NSString *)title
						  message:(nullable NSString *)message
			 alertControllerStyle:(UIAlertControllerStyle)alertControllerStyle
				cancelButtonTitle:(nonnull NSString *)cancelButtonTitle
				otherButtonTitles:(nullable NSArray *)otherButtonTitles
				otherButtonStyles:(nullable NSDictionary *)otherButtonStyles
			 preferredActionTitle:(nullable NSString *)preferredActionTitle
					   completion:(nullable RQAlertViewCompletion)completion {
	__block UIAlertController *alertController = [UIAlertController alertControllerWithTitle:title message:message preferredStyle:alertControllerStyle];
	
	void (^alertActionHandler) (UIAlertAction *) = [^(UIAlertAction *action) {
		if (completion) {
			if (action.style == UIAlertActionStyleCancel) {
				completion(NSNotFound);
			}else {
				NSUInteger index = [alertController.actions indexOfObject:action];
				completion(index - 1);
			}
		}
		alertController = nil;
	} copy];
	
	[alertController addAction:[UIAlertAction actionWithTitle:cancelButtonTitle style:UIAlertActionStyleCancel handler:alertActionHandler]];
	
	
	@synchronized (alertController) {
		for (NSString *buttonTitle in otherButtonTitles) {
			NSNumber *actionStyleNumber = [otherButtonStyles valueForKey:buttonTitle];
			UIAlertActionStyle actionStyle = UIAlertActionStyleDefault;
			if (actionStyleNumber) {
				actionStyle = [actionStyleNumber integerValue];
			}
			UIAlertAction *action = [UIAlertAction actionWithTitle:buttonTitle
															 style:actionStyle
														   handler:alertActionHandler];
			[alertController addAction:action];
			
			///Support for iOS9 add preferredAction for highlights the text of that action
			if ([alertController respondsToSelector:@selector(setPreferredAction:)]) {
				if ([preferredActionTitle isEqualToString:buttonTitle]) {
					if (@available(iOS 9.0, *)) {
						[alertController setPreferredAction:action];
					} else {
						// Fallback on earlier versions
					}
				}
			}
		}
	}
	[[RQ_SHARE_FUNCTION getCurrentVC] presentViewController:alertController animated:YES completion:nil];
}

- (void)showAlertWithTitle:(nullable NSString *)title
				   message:(nullable NSString *)message
	  alertControllerStyle:(UIAlertControllerStyle)alertControllerStyle
		 cancelButtonTitle:(nonnull NSString *)cancelButtonTitle
		 otherButtonTitles:(nullable NSArray *)otherButtonTitles
		 otherButtonStyles:(nullable NSDictionary *)otherButtonStyles
	  preferredActionTitle:(nullable NSString *)preferredActionTitle
				completion:(nullable RQAlertViewCompletion)completion{
	[self showAlertAtViewController:[RQ_SHARE_FUNCTION getCurrentVC]
						  WithTitle:title
							message:message
			   alertControllerStyle:alertControllerStyle
				  cancelButtonTitle:cancelButtonTitle
				  otherButtonTitles:otherButtonTitles
				  otherButtonStyles:otherButtonStyles
			   preferredActionTitle:preferredActionTitle
						 completion:completion];
}

- (void)showAlertWithTitle:(nullable NSString *)title
				   message:(nullable NSString *)message
	  alertControllerStyle:(UIAlertControllerStyle)alertControllerStyle
		 cancelButtonTitle:(nonnull NSString *)cancelButtonTitle
		 otherButtonTitles:(nullable NSArray *)otherButtonTitles
		 otherButtonStyles:(nullable NSDictionary *)otherButtonStyles
				completion:(nullable RQAlertViewCompletion)completion {
	[self showAlertAtViewController:[RQ_SHARE_FUNCTION getCurrentVC]
						  WithTitle:title
							message:message
			   alertControllerStyle:alertControllerStyle
				  cancelButtonTitle:cancelButtonTitle
				  otherButtonTitles:otherButtonTitles
				  otherButtonStyles:otherButtonStyles
			   preferredActionTitle:nil
						 completion:completion];
}

#pragma mark - Custom Way
- (UIViewController *)getCurrentVC {
	UIViewController *result = nil;
	UIWindow * window = [[UIApplication sharedApplication].delegate window];
	//app默认windowLevel是UIWindowLevelNormal，如果不是，找到UIWindowLevelNormal的
	if (window.windowLevel != UIWindowLevelNormal)
	{
		NSArray *windows = [[UIApplication sharedApplication] windows];
		for(UIWindow * tmpWin in windows)
		{
			if (tmpWin.windowLevel == UIWindowLevelNormal)
			{
				window = tmpWin;
				break;
			}
		}
	}
	id  nextResponder = nil;
	UIViewController *appRootVC=window.rootViewController;
	//    如果是present上来的appRootVC.presentedViewController 不为nil
	if (appRootVC.presentedViewController) {
		//多层present
		while (appRootVC.presentedViewController) {
			appRootVC = appRootVC.presentedViewController;
			if (appRootVC) {
				nextResponder = appRootVC;
			}else{
				break;
			}
		}
		//        nextResponder = appRootVC.presentedViewController;
	}else{
		
		// 如果当前UIViewController顶层不是UIView，那就需要循环获取到该UIViewController对应的UIView，
		// 才能跳出循环
		int i= 0;
		UIView *frontView = [[window subviews] objectAtIndex:i];
		nextResponder = [frontView nextResponder];
		while (![nextResponder isKindOfClass:[UIViewController class]]) {
			i++;
			frontView = [[window subviews]objectAtIndex:i];
			nextResponder = [frontView nextResponder];
		}
	}
	
	if ([nextResponder isKindOfClass:[UITabBarController class]]){
		UITabBarController * tabbar = (UITabBarController *)nextResponder;
		UINavigationController * nav = (UINavigationController *)tabbar.viewControllers[tabbar.selectedIndex];
		//        UINavigationController * nav = tabbar.selectedViewController ; 上下两种写法都行
		result=nav.childViewControllers.lastObject;
		
	}else if ([nextResponder isKindOfClass:[UINavigationController class]]){
		UIViewController * nav = (UIViewController *)nextResponder;
		result = nav.childViewControllers.lastObject;
	}else{
		result = nextResponder;
	}
	return result;
}

- (NSData *)compressQualityWithImage:(UIImage *)image MaxLength:(NSInteger)maxLength {
	CGFloat compression = 1;
	NSData *data = UIImageJPEGRepresentation(image, compression);
	if (data.length < maxLength) return data;
	CGFloat max = 1;
	CGFloat min = 0;
	NSData *lastData;
	for (int i = 0; i < 99; ++i) {
		compression = (max + min) / 2;
		data = UIImageJPEGRepresentation(image, compression);
		if (data.length == lastData.length) {
			return data;
		}else {
			lastData = data;
		}
		if (data.length < maxLength * 0.9) {
			min = compression;
		} else if (data.length > maxLength) {
			max = compression;
		} else {
			break;
		}
	}
	return data;
}


@end