//

 //  RootViewController.m

 //  GetImageFromPhotoAlbum

 //

 //  Created by 王云龙 on 16/1/18.

 //  Copyright © 2016年 王云龙. All rights reserved.

 //

 #import "RootViewController.h"

 #import "SecViewController.h"

 @interface RootViewController ()<UIActionSheetDelegate,UINavigationControllerDelegate, UIImagePickerControllerDelegate>

 {

     UIImageView *_imageView;

     UIImageView *_imageViewR;

 }

 @end

 @implementation RootViewController

 /**

  *  1.导航器

  *  2.UIImagePickerController

  *  3.iOS文件存取，沙盒机制

  */

 - (void)viewDidLoad

 {

     [super viewDidLoad];

     // Do any additional setup after loading the view.

 #pragma mark - 导航器设置

     [self.navigationController.navigationBar setTranslucent:NO];//设置navigationbar的半透明

     NSLog(@"frame = %@,bounds = %@",NSStringFromCGRect(self.view.frame),NSStringFromCGRect(self.view.window.bounds));

     self.title = @"navigationcontroller";//设置navigationbar上显示的标题

     [self.navigationController.navigationBar setBarTintColor:[UIColor purpleColor]];//设置navigationbar的颜色

     UIBarButtonItem *left = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(leftAction:)];

     self.navigationItem.leftBarButtonItem = left; //设置navigationbar左边按钮

     self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemCamera target:self action:@selector(rightAction:)];//设置navigationbar右边按钮

     [self.navigationController.navigationBar setTintColor:[UIColor whiteColor]];//设置navigationbar上左右按钮字体颜色

 #pragma mark - 画面初始化

     _imageViewR = [[UIImageView alloc]initWithFrame:CGRectMake(, , , )];

     _imageViewR.backgroundColor = [UIColor grayColor];

     [self.view addSubview:_imageViewR];

     _imageView = [[UIImageView alloc]initWithFrame:CGRectMake(, , self.view.frame.size.width-, self.view.frame.size.width-)];

     _imageView.backgroundColor = [UIColor grayColor];

     [self.view addSubview:_imageView];

     UIButton *btn = [UIButton buttonWithType:UIButtonTypeSystem];

     btn.frame = CGRectMake(, CGRectGetMaxY(_imageView.frame)+, self.view.frame.size.width-, );

     btn.layer.cornerRadius = ;

     btn.layer.masksToBounds = YES;

     [btn setTitle:@"获取相册图片" forState:UIControlStateNormal];

     [btn addTarget:self action:@selector(btnAction:) forControlEvents:UIControlEventTouchUpInside];

     [self.view addSubview:btn];

 }

 #pragma mark - 导航控制器的跳转

 -(void)leftAction:(UIBarButtonItem*)sender{

     //只能跳到没有没有导航控制器的controller

     SecViewController *secVC = [[SecViewController alloc]init];

     [self.navigationController pushViewController:secVC animated:YES];

 }

 -(void)rightAction:(UIBarButtonItem*)sender{

     //相册

     UIImagePickerController *imagePickController = [[UIImagePickerController alloc]init];

     imagePickController.delegate = self;

     imagePickController.allowsEditing = YES;

     imagePickController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;

     [self presentViewController:imagePickController animated:YES completion:nil

      ];

 }

 #pragma mark - 相册中取得图片并显示

 -(void)btnAction:(UIButton*)sender{

     UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"获取图片" message:nil preferredStyle:UIAlertControllerStyleActionSheet];

     //判断支持类型

     //相册和图库的区别

     //http://zhidao.baidu.com/link?url=DGZvUPsBPpArTyqP5ff2BcbVL1s_OUuH9A4TfB3Bn0xTP_iylo7Y45wAShBGZXDW85cicNPaeXSQlLiPzYCvCbDmA9gPHX5042sNfrN5ZFu

     if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera])

         NSLog(@"支持相机");

     else

         NSLog(@"不支持相机");

     if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary])

         NSLog(@"支持图库");

     else

         NSLog(@"不支持图库");

     if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeSavedPhotosAlbum])

         NSLog(@"支持相册");

     else

         NSLog(@"不支持相册");

     //判断是否支持相机

     if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {

         UIAlertAction*defualtAction = [UIAlertAction actionWithTitle:@"拍照" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {

             UIImagePickerController *imagePickerController = [[UIImagePickerController alloc]init];

             imagePickerController.delegate = self;

             imagePickerController.allowsEditing = YES;

             imagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera;

             [self presentViewController:imagePickerController animated:YES completion:^{}];

         }];

         [alertController addAction:defualtAction];

     }

     UIAlertAction *defaultAction1 = [UIAlertAction actionWithTitle:@"从相册选择" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {

         //相册

         UIImagePickerController *imagePickController = [[UIImagePickerController alloc]init];

         imagePickController.delegate = self;

         imagePickController.allowsEditing = YES;

         imagePickController.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;

         [self presentViewController:imagePickController animated:YES completion:nil

          ];

     }];

     UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:nil];

     [alertController addAction:cancelAction];

     [alertController addAction:defaultAction1];

     //弹出视图

     [self presentViewController:alertController animated:YES completion:nil];

 }

 #pragma mark - 文件保存到本地

 //http://blog.csdn.net/jianjianyuer/article/details/8556024

 -(void)saveImage:(UIImage*)currentImage withName:(NSString*)name{

     //图片读取的两个方法

     //http://blog.csdn.net/lovenjoe/article/details/7484217

     //NSData存储二进制数据

     //http://blog.csdn.net/jjmm2009/article/details/39004149

     NSData *imageData = UIImagePNGRepresentation(currentImage);

     //沙盒介绍

     //http://www.cnblogs.com/taintain1984/archive/2013/03/19/2969201.html

     NSString *fullPath = [[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"]stringByAppendingPathComponent:name];

     //沙盒文件操作

     //http://www.cocoachina.com/bbs/read.php?tid-78784.html

     //将图片写入

     [imageData writeToFile:fullPath atomically:YES];

 }

 #pragma mark - UIImagePickerController的代理方法。

 -(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info{

     [picker dismissViewControllerAnimated:YES completion:nil];

     //得到原始图片，未编辑的

     UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];

     //判断是否图片已经读取过

     NSString*referenceURL = [info objectForKey:UIImagePickerControllerReferenceURL];

     NSLog(@"%@",referenceURL);

     //保存图片到本地

     //文件名为时间戳，防止重名

     NSDate *datenow = [NSDate date];

     NSString *timeSp = [NSString stringWithFormat:@"%lf",[datenow timeIntervalSince1970]];

     NSString *fileName = [NSString stringWithFormat:@"%@.png",timeSp];

     [self saveImage:image withName:fileName];

     NSString *fullPath = [[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"]stringByAppendingPathComponent:fileName];

     UIImage *saveImage = [[UIImage alloc]initWithContentsOfFile:fullPath];

     //设置图片显示

     [_imageView setImage:saveImage];

     [_imageViewR setImage:image];

 }

 -(void)imagePickerControllerDidCancel:(UIImagePickerController *)picker{

     [picker dismissViewControllerAnimated:YES completion:nil];

 }

 - (void)didReceiveMemoryWarning {

     [super didReceiveMemoryWarning];

     // Dispose of any resources that can be recreated.

 }

 @end