iOS開發之錄像拍照

一、屬性

錄像和拍照用到的都是UIImagePickerController這個類,但是使用的時候怎么區分它們呢?下面就先說一下它們的一些基本屬性:

1. 區分拍照或是錄像:cameraCaptureMode:

拍照:UIImagePickerControllerCameraCaptureModePhoto,
錄像:UIImagePickerControllerCameraCaptureModeVideo
默認的是拍照

2.區分是使用攝像頭或是相冊:sourceType

圖庫:UIImagePickerControllerSourceTypePhotoLibrary,
相機:UIImagePickerControllerSourceTypeCamera,
相冊:UIImagePickerControllerSourceTypeSavedPhotosAlbum

3.區分前置攝像頭 后置攝像頭:cameraDevice

后攝像頭:UIImagePickerControllerCameraDeviceRear,
前攝像頭:UIImagePickerControllerCameraDeviceFront

4. 設置是否顯示控制控件:showsCameraControls默認的是顯示控制控件
5.設置拍照:takePicture
6.錄像:

開始:startVideoCapture
結束:stopVideoCapture

7.設置視頻清晰度:videoQuality

UIImagePickerControllerQualityTypeHigh
UIImagePickerControllerQualityTypeMedium
UIImagePickerControllerQualityTypeLow
UIImagePickerControllerQualityType640x480
UIImagePickerControllerQualityTypeIFrame1280x720
UIImagePickerControllerQualityTypeIFrame960x540

8.設置視頻最大的錄像時間:videoMaximumDuration 默認是10分鐘
9. 閃光模式:cameraFlashMode:

UIImagePickerControllerCameraFlashModeOff 關閉的
UIImagePickerControllerCameraFlashModeAuto =0,自動的默認的是自動的
UIImagePickerControllerCameraFlashModeOn 開啟的

10.設置調用攝像頭視圖頁面的 覆蓋視圖:cameraOverlayView
11.設置拍照頁面的形態:cameraViewTransform

二、代理

代理delegate:需要導入兩個代理:
UINavigationControllerDelegate、
UIImagePickerControllerDelegate
@property(nullable,nonatomic,weak) id <UINavigationControllerDelegate, UIImagePickerControllerDelegate> delegate;

采集完成之后調用 不區分拍照攝像

  • (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info;
    采集取消的時候調用
  • (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker;

三、代碼示例

廢話不多說了,上代碼(使用的時候請用真機測試,因為模擬器是不支持攝像頭的功能的):

#import "ViewController.h"
#import <MobileCoreServices/MobileCoreServices.h>//這個框架是選擇媒體類型時需要用到的
#import "UIView Transfrom.h"http://這個是自己封裝的一個簡單的動畫類,這里沒有附上代碼可以將它屏蔽,showTypeLabel的時候用到的
#import <AVKit/AVKit.h>
#import <AVFoundation/AVFoundation.h>
#define SCREEN_BOUNDS [UIScreen mainScreen].bounds//屏幕尺寸
#define SCREEN_WIDTH CGRectGetWidth([UIScreen mainScreen].bounds)//屏幕寬
#define SCREEN_HEIGHT CGRectGetHeight([UIScreen mainScreen].bounds)//屏幕高
@interface ViewController ()< UINavigationControllerDelegate, UIImagePickerControllerDelegate>{
    BOOL isMovie;//判斷拍照攝像的依據
    UILabel *showTypeLabel;//顯示拍照或是錄像的控件
    UIImageView *showMediaView;//顯示拍照錄像結果的視圖
    
}

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    UISwitch *mediaSwich = [[UISwitch alloc]initWithFrame:CGRectMake(SCREEN_WIDTH - 100, 60, 50, 50)];
    [mediaSwich addTarget:self action:@selector(changeMediaType:) forControlEvents:UIControlEventValueChanged];
    
    [self.view addSubview:mediaSwich];
    showTypeLabel = [[UILabel alloc]initWithFrame:CGRectMake(CGRectGetMinX(mediaSwich.frame), CGRectGetMinY(mediaSwich.frame)+50, 50, 30)];
    showTypeLabel.textAlignment = NSTextAlignmentCenter;
    showTypeLabel.textColor = [UIColor colorWithRed:0.8963 green:0.3301 blue:1.0 alpha:1.0];
    showTypeLabel.text = @"拍照";
    [self.view addSubview:showTypeLabel];
    
    UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
    button.frame = CGRectMake(100, 100, 100, 100);
    [button setTitle:@"Camera" forState:UIControlStateNormal];
    button.backgroundColor = [UIColor brownColor];
    [button addTarget:self action:@selector(doit) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:button];
    showMediaView = [[UIImageView alloc]initWithFrame:CGRectMake(100, 200, 200, 200)];
    showMediaView.contentMode = UIViewContentModeScaleAspectFill;
    
    [self.view addSubview:showMediaView];
    
    
}
-(void)changeMediaType:(UISwitch *)sender{
    [showTypeLabel rotation];
    
    showTypeLabel.text = sender.isOn!=YES?@"拍照":@"錄像" ;
    isMovie = sender.isOn;
    
}
-(void)doit{
    
    UIImagePickerController *pickerController = [[UIImagePickerController alloc]init];
    //選擇攝像頭設備 默認的是選擇相冊
    pickerController.sourceType =  UIImagePickerControllerSourceTypeCamera;
    if (isMovie == YES) {
        //拍照的時候不選擇mediaTypes不會崩潰是因為默認設置是kUTTypeImage
        //kUTTypeImage包含在MobileCoreServices框架里面->需要的內容不是OC里面字符串的類型需要強制轉換
        //錄制視頻類型要選擇kUTTypeMovie 它里面包含了audio和video
        pickerController.mediaTypes = @[(NSString *)kUTTypeMovie];
        //設置錄像 默認的是拍照 -> 選擇cameraCaptureMode一定要先選擇mediaTypes否則會崩潰
        pickerController.cameraCaptureMode =  UIImagePickerControllerCameraCaptureModeVideo;
        
    }
    //里面包含兩個代理
    pickerController.delegate = self;
    
    [self presentViewController:pickerController animated:YES completion:nil];
    
}
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info{
    NSLog(@"錄制完成");
    NSLog(@">>:%@",info);
    if ([info[UIImagePickerControllerMediaType]isEqualToString:(NSString *)kUTTypeMovie]) {
        NSLog(@"錄像,錄制完成");
        NSString *path = (NSString *)[info[UIImagePickerControllerMediaURL] path];
        //保存視頻到相冊
        UISaveVideoAtPathToSavedPhotosAlbum(path, self, @selector(video:didFinishSavingWithError:contextInfo:), nil) ;
        
    }
    if ([info[UIImagePickerControllerMediaType]isEqualToString:(NSString *)kUTTypeImage]) {
        NSLog(@"拍照,拍照完成");
        UIImage *finishImage = info[UIImagePickerControllerOriginalImage];
        showMediaView.image = nil;
        showMediaView.image = finishImage;
        //將圖片轉換成二進制
        NSData *imageData = UIImageJPEGRepresentation(finishImage, 0.1);
        NSData *imageData1 = UIImagePNGRepresentation(finishImage);
        //把照片保存到相冊
        UIImageWriteToSavedPhotosAlbum(finishImage, self, @selector(image:didFinishSavingWithError:contextInfo:), nil);
        
    }
    [self dismissViewControllerAnimated:YES completion:nil];
}
//視頻保存到相冊之后調用
- (void)video:(NSString *)videoPath didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo{
    AVPlayer *player = [AVPlayer playerWithURL:[NSURL fileURLWithPath:videoPath]];
    AVPlayerViewController *vc = [[AVPlayerViewController alloc]init];
    vc.player = player;
    [self presentViewController:vc animated:YES completion:nil];
    
}
//保存成功就會調用這個方法
- (void)image:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo{
    NSLog(@"保存成功");
    
}
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker{
    NSLog(@"取消");
    [self dismissViewControllerAnimated:YES completion:nil];
}

@end

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