IOS-相机、相册

 //
 //  ViewController.m
 //  IOS_0301_相册和相机
 //
 //  Created by ma c on 16/3/1.
 //  Copyright © 2016年 博文科技. All rights reserved.
 //

 #import "ViewController.h"

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

 @property (nonatomic, strong) UIImageView *chooseImgView;
 @property (nonatomic, strong) UIButton *btnOpenCamera;

 @end

 @implementation ViewController

 - (void)viewDidLoad {
     [super viewDidLoad];

     self.chooseImgView = [[UIImageView alloc] initWithFrame:CGRectMake(, , , )];
     self.chooseImgView.backgroundColor = [UIColor cyanColor];
     [self.view addSubview:self.chooseImgView];
     self.btnOpenCamera = [UIButton buttonWithType:UIButtonTypeCustom];
     [self.btnOpenCamera setFrame:CGRectMake(, , , )];
     [self.btnOpenCamera setBackgroundColor:[UIColor redColor]];
     [self.btnOpenCamera setTitle:@"相册相机" forState:UIControlStateNormal];
     [self.view addSubview:self.btnOpenCamera];

     [self.btnOpenCamera addTarget:self action:@selector(openCamera) forControlEvents:UIControlEventTouchUpInside];
 }
 /*
  UIImagePickerController(图片拾取器)
  能够根据不同的指令，选择开启相机或相册
  ps:
  1.使用图片拾取器时，实现两个协议
    UIImagePickerControllerDelegate
    UINavigationControllerDelegate
  2.判断当前设备是否存在相机

  */

 - (void)openCamera
 {
     NSLog(@"打开相册");

     UIActionSheet *actionSheeet = [[UIActionSheet alloc] initWithTitle:@"开启系统相机|相册" delegate:self cancelButtonTitle:@"取消" destructiveButtonTitle:@"相机" otherButtonTitles:@"相册", nil];

     [actionSheeet showInView:self.view];

 }

 - (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
 {
     switch (buttonIndex) {
         case :
         {
             NSLog(@"相机");
             //设置图片拾取器
             UIImagePickerController *imgPicker = [[UIImagePickerController alloc] init];
             //设置代理
             imgPicker.delegate = self;
             //设置图片拾取器类型
             imgPicker.sourceType = UIImagePickerControllerSourceTypeCamera;
             //是否允许图片编辑
             imgPicker.allowsEditing = YES;
             //唤醒相机
             [self presentViewController:imgPicker animated:YES completion:nil];
         }
             break;
         case :
         {
             NSLog(@"相册");
             //设置图片拾取器
             UIImagePickerController *imgPicker = [[UIImagePickerController alloc] init];
             //设置代理
             imgPicker.delegate = self;
             //设置图片拾取器类型
             imgPicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
             //是否允许图片编辑
             imgPicker.allowsEditing = YES;
             //唤醒相机
             [self presentViewController:imgPicker animated:YES completion:nil];

         }
             break;

         default:
             break;
     }

 }

 - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info
 {
     //完成获取图片的操作
     NSLog(@"%@",info);
     //获取编辑后的图片
     UIImage *chooseImage = [info objectForKey:@"UIImagePickerControllerEditedImage"];
     NSString *imageName = [info objectForKey:@"UIImagePickerControllerReferenceURL"];
     NSLog(@"%@",imageName);

     self.chooseImgView.image = chooseImage;

     //将图片从系统相册中取出，并保存到沙河中
     NSString *homePath = [NSHomeDirectory() stringByAppendingPathComponent:@"/Documents"];
     NSString *realPath = [homePath stringByAppendingPathComponent:[NSString stringWithFormat:@"%d",arc4random()%]];

     NSLog(@"%@",realPath);
     [UIImageJPEGRepresentation(chooseImage, 1.0f) writeToFile:realPath atomically:YES];

     [self dismissViewControllerAnimated:YES completion:nil];

 }

 - (void)didReceiveMemoryWarning {
     [super didReceiveMemoryWarning];
     // Dispose of any resources that can be recreated.
 }

 @end