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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
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
[picker dismissViewControllerAnimated:YES completion:nil];
//获取图片
UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];
}
//取消点击
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
{
[self dismissViewControllerAnimated:YES completion:^{}];
}
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，
- (void) image: (UIImage *) image
didFinishSavingWithError: (NSError *) error
contextInfo: (void *) contextInfo{
//如果error==NULL，则表示图片保存成功
}
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
}
如何调用本地相册、相机
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原文地址：http://www.cnblogs.com/wxzboke/p/5061635.html
