ios 通过调用系统摄像头拍照,拍视频,然后写入文件

来源：互联网发布：淘宝直播知乎编辑：程序博客网时间：2024/04/28 21:49

如果您的App里需要获得由系统自带的照相机、摄像机和录音软件所生成的文件。可以借鉴以下代码来调用iPhone摄像头拍照或者摄像的功能，并把获得的数据直接写入到文件。

//这一段是,点击一个takePicture按钮的操作.

01- (IBAction)takePicture:(id)sender {
02  
03UIImagePickerController *picker = [[UIImagePickerController alloc] init];
04  
05if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
06picker.sourceType = UIImagePickerControllerSourceTypeCamera;
07NSArray *temp_MediaTypes = [UIImagePickerController availableMediaTypesForSourceType:picker.sourceType];
08picker.mediaTypes = temp_MediaTypes;
09picker.delegate = self;
10picker.allowsImageEditing = YES;
11}
12  
13[self presentModalViewController:picker animated:YES];
14[picker release];
15  
16}

//下面两个函数是遵守 UIImagePickerControllerDelegate这个协议所实现的类.这样就能够完整的实现,获取照片或者视频,然后写入文件的过程.

view source
print?
01    - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
02    {
03      
04    NSString *mediaType = [info objectForKey:UIImagePickerControllerMediaType];
05      
06    BOOL success;
07    NSFileManager *fileManager = [NSFileManager defaultManager];
08    NSError *error;
09      
10    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
11    NSString *documentsDirectory = [paths objectAtIndex:0];
12      
13    if ([mediaType isEqualToString:@"public.image"]){
14      
15    UIImage *image = [info objectForKey:@"UIImagePickerControllerEditedImage"];
16;    NSLog(@“found an image”);
17      
18    NSString *imageFile = [documentsDirectory stringByAppendingPathComponent:@"temp.jpg"];
19;    NSLog(@“%@”, ,imageFile);
20      
21    success = [fileManager fileExistsAtPath:imageFile];
22    if(success) {
23    success = [fileManager removeItemAtPath:imageFile error:>error];
24    }
25      
26    imageView.image = image;
27    [UIImageJPEGRepresentation(image, 1.0f) writeToFile:imageFile atomically:YES];
28      
29    //SETIMAGE(image);
30    //CFShow([[NSFileManager defaultManager] directoryContentsAtPath:[NSHomeDirectory() stringByAppendingString:@"/Documents"]]);
31;    }
32    else if([mediaType isEqualToString:@"public.movie"]){
33    NSURL *videoURL = [info objectForKey:UIImagePickerControllerMediaURL];
34    NSLog(@“%@”, ,videoURL);
35    NSLog(@“found a video”);
36    NSData *videoData = [NSData dataWithContentsOfURL:videoURL];
37      
38    /****************************************/
39      
40    NSString *videoFile = [documentsDirectory stringByAppendingPathComponent:@"temp.mov"];
41;    NSLog(@“%@”, ,videoFile);
42      
43    success = [fileManager fileExistsAtPath:videoFile];
44    if(success) {
45    success = [fileManager removeItemAtPath:videoFile error:>error];
46    }
47    [videoData writeToFile:videoFile atomically:YES];
48    //CFShow([[NSFileManager defaultManager] directoryContentsAtPath:[NSHomeDirectory() stringByAppendingString:@"/Documents"]]);
49;    //NSLog(videoURL);
50    }
51    [picker dismissModalViewControllerAnimated:YES];
52    }
53      
54    - (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {
55      
56    [picker dismissModalViewControllerAnimated:YES];
57      
58    }

0 0