如何调用本地相册、相机

[align=center] [/align]
1、判断系统是否支持相机
[UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]
2、创建相册视图控制器对象
UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init];
3、设置sourceType（资源类型）

imagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera;//相机
imagePickerController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;//图片库

imagePickerController.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;//保存的图片
4、设置弹出动画（可选）
imagePickerController.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
5、设置是否允许编辑图片
imagePickerController.allowsEditing = YES;
6、设置代理(UIImagePickerControllerDelegate)
imagePickerController.delegate = self;
7、实现代理方法：获取图片

[align=left]- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info[/align]
[align=left]{[/align]
[align=left] [picker dismissViewControllerAnimated:YES completion:nil];[/align]
[align=left] //获取图片[/align]
[align=left] UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];[/align]
[align=left]}[/align]
[align=left]//取消点击[/align]
[align=left]- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker[/align]
[align=left]{[/align]
[align=left] [self dismissViewControllerAnimated:YES completion:^{}];[/align]

[align=left]}[/align]
8、保存图片到相册

UIImageWriteToSavedPhotosAlbum(image, self, @selector(image:didFinishSavingWithError:contextInfo:), nil);//image：要保存的图片UImage对象，
[align=left]- (void) image: (UIImage *) image[/align]
[align=left]didFinishSavingWithError: (NSError *) error[/align]
[align=left] contextInfo: (void *) contextInfo{[/align]
[align=left]//如果error==NULL，则表示图片保存成功[/align]
}

具体代码：
- (void)viewDidLoad {
[super viewDidLoad];
UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
btn.frame = CGRectMake(10, 50, 80, 80);
btn.backgroundColor = [UIColor redColor];
[btn addTarget:self action:@selector(showpicker) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:btn]；

}

-(void)showpicker{
UIImagePickerController *imagepicker = [[UIImagePickerController alloc]init];
imagepicker.sourceType = 2;//设置类型（0代表调用相册，1 代表弹出相机）
imagepicker.allowsEditing = YES;//是否允许编辑，默认no，设置为yes时，点击图片会进入编辑界面（裁剪）

imagepicker.delegate = self;//设置代理
[self presentViewController:imagepicker animated:YES completion:nil];//弹出相册／相机

}

//选择图片后调用的代理方法

-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info{
NSLog(@"%@",info);
UIImage *image = info[@"UIImagePickerControllerEditedImage"];//获取图片
UIImageView *imageview = [[UIImageView alloc]initWithImage:image];
imageview.frame = CGRectMake(40, 150, 100, 100);
[self.view addSubview:imageview];
[self dismissViewControllerAnimated:YES completion:nil];//消失imagepicker

}