UIImagePickerController拍照和录像

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// 
//  ViewController.m
//  TestVideoAndPicture
// 
//  Created by albert on 2017/4/14.
//  Copyright © 2017年 albert. All rights reserved.
// 

#import "ViewController.h"

#import 

#import 

@interface ViewController () 
@property (weak, nonatomic) IBOutlet UIButton *testGestureButton;
@property (weak, nonatomic) IBOutlet UIImageView *testImageView;

@end

@implementation ViewController

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

// 选择相册中视频和照片
- (IBAction)videos:(id)sender {
    // 检查相册是否可用
    if (![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary]) {
        
        NSLog(@"sorry, no camera or camera is unavailable.");
        
        return;
    }
    
    // 创建图像选取控制器
    UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init];
    
    // 设置图像选取控制器的来源模式为PhotoLibrary
    imagePickerController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    
    // 设置图像选取控制器的类型为视频和照片
    imagePickerController.mediaTypes = [[NSArray alloc] initWithObjects:(NSString*)kUTTypeMovie, (NSString*)kUTTypeImage, nil];
    
    // 允许用户进行编辑
    imagePickerController.allowsEditing = YES;
    
    // 设置委托对象
    imagePickerController.delegate = self;
    
    // 以模视图控制器的形式显示
    [self presentViewController:imagePickerController animated:YES completion:nil];
}

// 拍照
- (IBAction)takePictureButtonClick:(id)sender{
    
    // 检查相机模式是否可用
    if (![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
        
        NSLog(@"sorry, no camera or camera is unavailable.");
        
        return;
    }
    
    // 获得相机模式下支持的媒体类型
    NSArray *availableMediaTypes = [UIImagePickerController availableMediaTypesForSourceType:UIImagePickerControllerSourceTypeCamera];
    
    BOOL canTakePicture = NO;
    
    for (NSString *mediaType in availableMediaTypes) {
        
        if ([mediaType isEqualToString:(NSString*)kUTTypeImage]) {
            
            // 支持拍照
            canTakePicture = YES;
            
            break;
        }
    }
    
    // 检查是否支持拍照
    if (!canTakePicture) {
        
        NSLog(@"sorry, taking picture is not supported.");
        
        return;
    }
    
    // 创建图像选取控制器
    UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init];
    
    // 设置图像选取控制器的来源模式为相机模式
    imagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera;
    
    // 设置图像选取控制器的类型为静态图像
    imagePickerController.mediaTypes = [[NSArray alloc] initWithObjects:(NSString*)kUTTypeImage, nil];
    
    // 允许用户进行编辑
    imagePickerController.allowsEditing = YES;
    
    // 设置委托对象
    imagePickerController.delegate = self;
    
    // 以模视图控制器的形式显示
    [self presentViewController:imagePickerController animated:YES completion:nil];
}

// 录像
- (IBAction)captureVideoButtonClick:(id)sender{
    
    // 检查相机模式是否可用
    if (![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
        
        NSLog(@"sorry, no camera or camera is unavailable!!!");
        
        return;
    }
    
    // 获得相机模式下支持的媒体类型
    NSArray *availableMediaTypes = [UIImagePickerController availableMediaTypesForSourceType:UIImagePickerControllerSourceTypeCamera];
    
    BOOL canTakeVideo = NO;
    
    for (NSString *mediaType in availableMediaTypes) {
        
        if ([mediaType isEqualToString:(NSString *)kUTTypeImage]) {
            
            // 支持摄像
            canTakeVideo = YES;
            
            break;
        }
    }
    
    // 检查是否支持摄像
    if (!canTakeVideo) {
        
        NSLog(@"sorry, capturing video is not supported!!!");
        
        return;
    }
    
    // 创建图像选取控制器
    UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init];
    
    // 设置图像选取控制器的来源模式为相机模式
    imagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera;
    
    // 设置图像选取控制器的类型为动态图像
    imagePickerController.mediaTypes = [[NSArray alloc] initWithObjects:(NSString *)kUTTypeMovie, nil];
    
    // 设置摄像图像品质
    imagePickerController.videoQuality = UIImagePickerControllerQualityTypeHigh;
    
    // 设置最长摄像时间
    imagePickerController.videoMaximumDuration = 30;
    
    // 允许用户进行编辑
    imagePickerController.allowsEditing = YES;
    
    // 设置委托对象
    imagePickerController.delegate = self;
    
    // 以模式视图控制器的形式显示
    [self presentViewController:imagePickerController animated:YES completion:nil];
}

- (void)image:(UIImage*)image didFinishSavingWithError:(NSError*)error contextInfo:(void*)contextInfo{
    
    if (!error) {
        
        NSLog(@"picture saved with no error.");
        
    }else{
        
        NSLog(@"error occured while saving the picture%@", error);
        
    }
}

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info{
    
    // 打印出字典中的内容
    NSLog(@"get the media info: %@", info);
    
    // 获取媒体类型
    NSString *mediaType = [info objectForKey:UIImagePickerControllerMediaType];
    
    // 判断是静态图像还是视频
    if ([mediaType isEqualToString:(NSString *)kUTTypeImage]) { // 图片
        
        // 获取用户编辑之后的图像
        UIImage *editedImage = [info objectForKey:UIImagePickerControllerEditedImage];
        
        // 将该图像保存到媒体库中
        UIImageWriteToSavedPhotosAlbum(editedImage, self,@selector(image:didFinishSavingWithError:contextInfo:), NULL);
        
    }else if ([mediaType isEqualToString:(NSString *)kUTTypeMovie]) { // 视频
        
        // 获取视频文件的url
        NSURL *mediaURL = [info objectForKey:UIImagePickerControllerMediaURL];
        
        // 创建ALAssetsLibrary对象并将视频保存到媒体库
        ALAssetsLibrary *assetsLibrary = [[ALAssetsLibrary alloc] init];
        
        [assetsLibrary writeVideoAtPathToSavedPhotosAlbum:mediaURL completionBlock:^(NSURL *assetURL, NSError *error) {
            if (!error) {
                
                NSLog(@"captured video saved with no error.");
                
            }else{
                
                NSLog(@"error occured while saving the video:%@", error);
                
            }
        }];
    }
    
    [picker dismissViewControllerAnimated:YES completion:nil];
}

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker{
    
    [picker dismissViewControllerAnimated:YES completion:nil];
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation{
    
    return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}

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


@end

参考：http://blog.csdn.net/pucker