Will的部落格

此範例為點及按鈕開啟相機，

使用相機拍照顯示在imageview後並存入相簿

#import "ViewController.h"

@interface ViewController ()

- (IBAction)takePictureButton:(id)sender;
@property (weak, nonatomic) IBOutlet UIImageView *myImageView;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    UITapGestureRecognizer * tapPress = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(handleTap:)];
    tapPress.numberOfTapsRequired = 1;
    [_myImageView setUserInteractionEnabled:YES];
    [_myImageView addGestureRecognizer:tapPress];
    
}

-(void)handleTap:(id)sender
{
    UIActionSheet *actionSheet = [[UIActionSheet alloc]initWithTitle:nil delegate:self cancelButtonTitle:@"cancle" destructiveButtonTitle:nil otherButtonTitles:@"save to album", nil];
    
    [actionSheet showInView:self.view];
}

- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
{
    if(buttonIndex == 0 )
    {
        UIImageWriteToSavedPhotosAlbum( _myImageView.image , self, @selector(image:didFinishSavingWithError:comtextInfo:), nil);
    }
}

-(void)image:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo
{
    if(!error){
        UIAlertView *alertView = [[UIAlertView alloc]initWithTitle:@"save to album" message:@"save to album already" delegate:self cancelButtonTitle:@"ok" otherButtonTitles:nil];
        [alertView show];
    }else{
        UIAlertView *alertView = [[UIAlertView alloc]initWithTitle:@"save to album" message:@"failed to save" delegate:self cancelButtonTitle:@"ok" otherButtonTitles:nil];
        [alertView show];
    }
}


- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

- (IBAction)takePictureButton:(id)sender {
    
    UIImagePickerController * ipc = [[UIImagePickerController alloc]init];
    
    //確認裝置是否有相機可使用
    if ([UIImagePickerController isSourceTypeAvailable:(UIImagePickerControllerSourceTypeCamera)]) {
        
        ipc.sourceType = UIImagePickerControllerSourceTypeCamera;
        
        //確認是否有後方鏡頭
        if ([UIImagePickerController isCameraDeviceAvailable:UIImagePickerControllerCameraDeviceRear]) {
            
            ipc.cameraDevice = UIImagePickerControllerCameraDeviceRear;
            
            //設定是拍照還是錄影
            ipc.cameraCaptureMode = UIImagePickerControllerCameraCaptureModePhoto;
            ipc.allowsEditing = YES;
            ipc.delegate = self;
            
            [self presentViewController:ipc animated:YES completion:nil];
        }
    }
}

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    //取得目前拿到的資料型態
    NSString *mediaType = [ info objectForKey:UIImagePickerControllerMediaType];
    //目前照相的畫面關閉
    [picker dismissViewControllerAnimated:YES completion:nil];
    //資料型態必須為一般的照片
    if([mediaType isEqualToString:@"public.image"])
    {
        //照片是否編輯過
        if([info objectForKey:UIImagePickerControllerEditedImage])
        {
            UIImage *editedImage = [info objectForKey:UIImagePickerControllerEditedImage];
            _myImageView.image = editedImage;
        }else{
            UIImage *originalImage = [info objectForKey:UIImagePickerControllerOriginalImage];
            _myImageView.image = originalImage;
        }
    }
    
    
}
@end