iOS开发之录像拍照
2016-05-26 本文已影响651人
安静SRR
一、属性
录像和拍照用到的都是UIImagePickerController这个类，但是使用的时候怎么区分它们呢？下面就先说一下它们的一些基本属性：
1. 区分拍照或是录像：cameraCaptureMode：
拍照：UIImagePickerControllerCameraCaptureModePhoto,
录像：UIImagePickerControllerCameraCaptureModeVideo
默认的是拍照
2.区分是使用摄像头或是相册：sourceType
图库：UIImagePickerControllerSourceTypePhotoLibrary,
相机：UIImagePickerControllerSourceTypeCamera,
相册：UIImagePickerControllerSourceTypeSavedPhotosAlbum
3.区分前置摄像头 后置摄像头：cameraDevice
后摄像头：UIImagePickerControllerCameraDeviceRear,
前摄像头：UIImagePickerControllerCameraDeviceFront
4. 设置是否显示控制控件：showsCameraControls默认的是显示控制控件
5.设置拍照：takePicture
6.录像：
开始：startVideoCapture
结束：stopVideoCapture
7.设置视频清晰度:videoQuality
UIImagePickerControllerQualityTypeHigh
UIImagePickerControllerQualityTypeMedium
UIImagePickerControllerQualityTypeLow
UIImagePickerControllerQualityType640x480
UIImagePickerControllerQualityTypeIFrame1280x720
UIImagePickerControllerQualityTypeIFrame960x540
8.设置视频最大的录像时间：videoMaximumDuration 默认是10分钟
9. 闪光模式：cameraFlashMode：
UIImagePickerControllerCameraFlashModeOff 关闭的
UIImagePickerControllerCameraFlashModeAuto =0，自动的默认的是自动的
UIImagePickerControllerCameraFlashModeOn 开启的
10.设置调用摄像头视图页面的 覆盖视图：cameraOverlayView
11.设置拍照页面的形态：cameraViewTransform
二、代理
代理delegate：需要导入两个代理：
UINavigationControllerDelegate、
UIImagePickerControllerDelegate
@property(nullable,nonatomic,weak) id <UINavigationControllerDelegate, UIImagePickerControllerDelegate> delegate;
采集完成之后调用 不区分拍照摄像
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info;
采集取消的时候调用 - (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker;
三、代码示例
废话不多说了，上代码（使用的时候请用真机测试，因为模拟器是不支持摄像头的功能的）：
#import "ViewController.h"
#import <MobileCoreServices/MobileCoreServices.h>//这个框架是选择媒体类型时需要用到的
#import "UIView Transfrom.h"//这个是自己封装的一个简单的动画类，这里没有附上代码可以将它屏蔽，showTypeLabel的时候用到的
#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)//屏幕宽
#define SCREEN_HEIGHT CGRectGetHeight([UIScreen mainScreen].bounds)//屏幕高
@interface ViewController ()< UINavigationControllerDelegate, UIImagePickerControllerDelegate>{
BOOL isMovie;//判断拍照摄像的依据
UILabel *showTypeLabel;//显示拍照或是录像的控件
UIImageView *showMediaView;//显示拍照录像结果的视图
}
@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":@"录像" ;
isMovie = sender.isOn;
}
-(void)doit{
UIImagePickerController *pickerController = [[UIImagePickerController alloc]init];
//选择摄像头设备 默认的是选择相册
pickerController.sourceType = UIImagePickerControllerSourceTypeCamera;
if (isMovie == YES) {
//拍照的时候不选择mediaTypes不会崩溃是因为默认设置是kUTTypeImage
//kUTTypeImage包含在MobileCoreServices框架里面->需要的内容不是OC里面字符串的类型需要强制转换
//录制视频类型要选择kUTTypeMovie 它里面包含了audio和video
pickerController.mediaTypes = @[(NSString *)kUTTypeMovie];
//设置录像 默认的是拍照 -> 选择cameraCaptureMode一定要先选择mediaTypes否则会崩溃
pickerController.cameraCaptureMode = UIImagePickerControllerCameraCaptureModeVideo;
}
//里面包含两个代理
pickerController.delegate = self;
[self presentViewController:pickerController animated:YES completion:nil];
}
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info{
NSLog(@"录制完成");
NSLog(@">>:%@",info);
if ([info[UIImagePickerControllerMediaType]isEqualToString:(NSString *)kUTTypeMovie]) {
NSLog(@"录像，录制完成");
NSString *path = (NSString *)[info[UIImagePickerControllerMediaURL] path];
//保存视频到相册
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;
//将图片转换成二进制
NSData *imageData = UIImageJPEGRepresentation(finishImage, 0.1);
NSData *imageData1 = UIImagePNGRepresentation(finishImage);
//把照片保存到相册
UIImageWriteToSavedPhotosAlbum(finishImage, self, @selector(image:didFinishSavingWithError:contextInfo:), nil);
}
[self dismissViewControllerAnimated:YES completion:nil];
}
//视频保存到相册之后调用
- (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];
}
//保存成功就会调用这个方法
- (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
