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(100, 100, 100, 100)];
    self.chooseImgView.backgroundColor = [UIColor cyanColor];
    [self.view addSubview:self.chooseImgView];
    self.btnOpenCamera = [UIButton buttonWithType:UIButtonTypeCustom];
    [self.btnOpenCamera setFrame:CGRectMake(100, 400, 200, 60)];
    [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 0:
        {
            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 1:
        {
            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()%1000]];
    
    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