用UIImagePickerController调用系统照相机

iPhone API 中提供了调用系统照相机的接口，我们只需调用相应的界面，即刻在自己的程序中获取相机图片。下面是一个非常简单的调用系统照相机的例子，相应的界面如下: 
 
最后可以编辑图片和使用相应的图片。 

下面是主要代码: 

Java代码  

1. - (void) addPicEvent   
2. {   
3.     //先设定sourceType为相机，然后判断相机是否可用（ipod）没相机，不可用将sourceType设定为相片库   
4.     UIImagePickerControllerSourceType sourceType = UIImagePickerControllerSourceTypeCamera;   
5.     if (![UIImagePickerController isSourceTypeAvailable: UIImagePickerControllerSourceTypeCamera]) {   
6.         sourceType = UIImagePickerControllerSourceTypePhotoLibrary;   
7.     }  
8.         //sourceType = UIImagePickerControllerSourceTypeCamera; //照相机   
9.         //sourceType = UIImagePickerControllerSourceTypePhotoLibrary; //相片库  
10.         //sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum; //保存的相片  
11.     UIImagePickerController *picker = [[UIImagePickerController alloc] init];   
12.     picker.delegate = self;   
13.     picker.allowsEditing = YES;   
14.     picker.sourceType = sourceType;   
15.     [self presentModalViewController:picker animated:YES];   
16.     [picker release];   
17. }   
18. - (void)saveImage:(UIImage *)image {   
19.     NSLog(@"保存");   
20. }   
21. #pragma mark –   
22. #pragma mark Camera View Delegate Methods   
23. - (void)imagePickerController:(UIImagePickerController *)picker   
24. didFinishPickingMediaWithInfo:(NSDictionary *)info {   
25.     [picker dismissModalViewControllerAnimated:YES];   
26.     UIImage *image = [[info objectForKey:UIImagePickerControllerEditedImage] retain];   
27.     [self performSelector:@selector(saveImage:)   
28.                withObject:image   
29.                afterDelay:0.5];   
30. }   
31. - (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {   
32.     [picker dismissModalViewControllerAnimated:YES];   
33. }