拍照并添加到 UITableView

Question

我有一个应用程序，在 UIViewcontroller 上有一个 takePhoto UIButton，使用户可以使用 imagePickerController 拍照。然后我希望将照片放在UITableView。

照片部分有效，出于测试目的，我将图像显示在UIImage photoImageView.image

我添加了UITableView 委托，然后UITable 被称为photoTable，而单元格被称为photoCell。我试图找出下面的代码来将图像添加到表格中但没有成功。非常感谢任何帮助。

- (IBAction)takePhoto:(id)sender 
{
[self startCameraControllerFromViewController: self usingDelegate: self];
}

-(void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
UIImage *image;
image = (UIImage *)
[info valueForKey:UIImagePickerControllerOriginalImage];
photoImageView.image=image;
UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil);
[picker dismissViewControllerAnimated:YES completion:nil];
}

-(void) imagePickerControllerDidCancel:(UIImagePickerController *)picker
{
[picker dismissViewControllerAnimated:YES completion:nil];
}

- (BOOL) startCameraControllerFromViewController: (UIViewController*) controller usingDelegate: (id <UIImagePickerControllerDelegate, UINavigationControllerDelegate>) delegate
{
if (([UIImagePickerController isSourceTypeAvailable: UIImagePickerControllerSourceTypeCamera] == NO) || (delegate == nil) || (controller == nil)) return NO;
UIImagePickerController *cameraUI = [[UIImagePickerController alloc] init];
cameraUI.sourceType = UIImagePickerControllerSourceTypeCamera;
cameraUI.mediaTypes = [UIImagePickerController availableMediaTypesForSourceType:UIImagePickerControllerSourceTypeCamera];
cameraUI.allowsEditing = NO;
cameraUI.delegate = delegate;
[controller presentViewController:cameraUI animated:YES completion:nil];
return YES;
}

- (UITableViewCell*)tableView:(UITableView*)photoTable cellForRowAtIndexPath:(NSIndexPath*)indexPath
{
static NSString* CellIdentifier = @"photoCell";

UITableViewCell* cell = [photoTable dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
cell.imageView.image = [UIImage imageNamed:@"nameOfImage.jpg"];

return cell;
}

Answer 1

在.h 文件中创建图像property 和tableview 出口

@property(nonatomic, strong) UIIImage *photoImage;
@property(nonatomic, strong) IBOutlet UITableView *tableview;

在didFinishPickingMediaWithInfo:方法中的.m文件中

-(void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
    {
    UIImage *image;
    image = (UIImage *)
    [info valueForKey:UIImagePickerControllerOriginalImage];
    self.photoImage = image;
    [self.tableView reloadData]; //call reloadData method to load data with image
    UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil);
    [picker dismissViewControllerAnimated:YES completion:nil];
    }

在 cellForRowAtIndexPath: 方法中

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

        UITableViewCell *cell = [self.movieTable dequeueReusableCellWithIdentifier:@"cell"];
        cell.imageView.image = self.photoImage; 

       or use array and add image to array in didFinishPickingMediaWithInfo: and use the image

       cell.imageView.image = [self.photoArray objectAtIndex:0]; 

}

Answer 2

在您的以下方法中：

imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info

添加这一行：

[_tableView reloadData];

返回更新的行数：

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section

并在 cellForRowAtIndexPath 中修改您的代码，如下所示：

if (cell == nil)
{
    cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];
}
cell.imageView.image = [UIImage imageNamed:@"nameOfImage.jpg"];

注意：如果您想显示多张图片，就像您拍摄的每张图片一样，请将图片保存在一个数组中。并在 cellForRowAtIndexPath 中检索它们，并为每个单元格分配不同的图像。

Answer 3

if (cell == nil)
    {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];

        cell.imageView.image = [UIImage imageNamed:@"nameOfImage.jpg"];
    }

试试吧，希望对你有帮助！

Answer 4

我认为您必须在拍摄照片后将图像保存在文档目录中

喜欢：

- (void)saveImage:(UIImage*)imagepk
{

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    NSString *savedImagePath = [documentsDirectory stringByAppendingPathComponent:@"savedImage.png"];
    UIImage *image = imagepk; // imageView is my image from camera
    NSData *imageData = UIImagePNGRepresentation(image);
    [imageData writeToFile:savedImagePath atomically:NO];
    // Code for saving image here

}

然后从文档目录访问并添加到数组中。