Question

我是Firebase的新手，我一直关注他们的文档here。但是，我尝试过的任何东西似乎都没有用。

我想做什么：

1）注册用户 -Works

2）让用户在注册过程中选择个人资料图片 - 没有工作。

代码：

- (void) registerNewUser:(FIRUser *)user

{
    FIRUser *currentUser = [FIRAuth auth].currentUser;
    NSString *email = emailAddressTxtField.text;
    NSString *password = passwordTxtField.text;
    NSString *username = usernameTxtField.text;
    [[FIRAuth auth]
     createUserWithEmail:email
     password:password
     completion:^(FIRUser *_Nullable user,
                  NSError *_Nullable error)
     {
         if (error)
         {
             NSLog(@"%@", error.localizedDescription);
             return;
         }
         else
         {
             ////ASSIGN NEW USER THEIR NAME////
             self.databaseRef = [[FIRDatabase database] reference];
             [[[databaseRef child:@"users"] child:user.uid]
              setValue:@{@"name": username}];
         }
     }];
    ////ESTABLISHED A USER, SO LET'S ASSIGN THEIR PIC TO THEM////
    if (profilePicImageView.image)
    {
        FIRStorageReference *profilePicRef = [[storageRef child:@"images/profilePicture.jpg"] child:currentUser.uid];
        FIRStorageMetadata *metadata = [[FIRStorageMetadata alloc] init];
        metadata.contentType = @"image/jpeg";
        NSData *imageData = UIImageJPEGRepresentation(self.profilePicImageView.image, 0.8);
        NSLog(@"metadata from image: %@", metadata);

        [profilePicRef putData:imageData metadata:metadata completion:^(FIRStorageMetadata *metadata, NSError *error)
         {
             if (error != nil)
             {
                 NSString *profileImageURL = metadata.downloadURL.absoluteString;
                 NSLog(@"Profile Image URL from image: %@", profileImageURL);
                 [ProgressHUD showSuccess:[NSString stringWithFormat:@"%@ Successfully Registered!!", username]];
                 [self.segmentedLoginRegister setSelectedSegmentIndex:0];
                 [self checkSegmentedControl];
                 [ProgressHUD showSuccess:[NSString stringWithFormat:@"Welcome %@!", username]];
             }
             else
             {
                 NSLog(@"Failed to Register User with profile image");
             }
         }];
    }
}

其他信息：

照片仅来自用户设备的相机胶卷调试区域打印：

[Generic]创建具有未知类型的图像格式是错误

Answer 1

我的猜测是profilePicImageView.image实际上并没有包含有效的图像对象。

Answer 2

如何注册用户

假设您有 3个文本字段来注册用户。您有 usernameTextfield，emailTextField和passwordTextfield 。我们还希望与此用户关联 profilePicture 。所以我们先：

建立了一种方法，将我们的用户值保存到Firebase数据库：

-(void) saveValuesForUser:(FIRUser *) user
{
    NSString *username = usernameTxtField.text;
    self.databaseRef = [[FIRDatabase database] reference];
    [[[databaseRef child:@"users"] child:user.uid]
     setValue:@{@"Name": username, @"Profile Picture": profileImageURL}];
}

上面的profileImageURL是一个NSString，您可以在视图控制器的实现之上创建，但我们也应该创建一个我们可以在整个ViewController中访问的UIImage：

#import "ViewController.h"
@import Photos;
@interface ViewController ()

@end

NSString *profileImageURL;
UIImage *profileImage;

@implementation ViewController

我猜你知道如何从UIButton启动相机，但如果你不这样做，让我们调用这些方法，以便当我们的用户点击按钮选择他们的图像时，它被设置为我们的profilePicture .imageView：

- (IBAction)chooseImageAction:(id)sender

{
    UIImagePickerController *picker = [[UIImagePickerController alloc] init];
    picker.delegate = self;
    picker.allowsEditing = YES;
    picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    [self presentViewController:picker animated:YES completion:NULL];
}

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info

{
    picker.delegate = self;
    profileImage = info[UIImagePickerControllerEditedImage];
    profilePicImageView.image = profileImage;
    [self dismissViewControllerAnimated:NO completion:nil];
}

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker

{
    [picker dismissViewControllerAnimated:YES completion:NULL];
}

现在我们正在用火烹饪！现在我们已经拥有了用户想要为其profilePicture上传的图像，让我们创建一种方法将其作为NSURL保存到我们的Firebase数据库中：

- (void) saveProfileImage

{
    FIRUser *currentUser = [FIRAuth auth].currentUser;
    NSString *username = usernameTxtField.text;

    if (profilePicImageView.image != nil)
    {
        FIRStorage *storage = [FIRStorage storage];
        storageRef = [storage referenceForURL:@"gs://PUTYOURFIREBASEHERE.appspot.com"];
        NSString *imageID = [[NSUUID UUID] UUIDString];
        NSString *imageName = [NSString stringWithFormat:@"Profile Pictures/%@.jpg",imageID];
        FIRStorageReference *profilePicRef = [storageRef child:imageName];
        FIRStorageMetadata *metadata = [[FIRStorageMetadata alloc] init];
        metadata.contentType = @"image/jpeg";
        NSData *imageData = UIImageJPEGRepresentation(self.profilePicImageView.image, 0.8);        
        [profilePicRef putData:imageData metadata:metadata completion:^(FIRStorageMetadata *metadata, NSError *error)
         {
             if (!error)
             {
                 profileImageURL = metadata.downloadURL.absoluteString;
                 [self saveValuesForUser: currentUser];
             }
             else if (error)
             {
                 NSLog(@"Failed to Register User with profile image");
             }
         }];
    }
}

重要提示：请确保为storageRef的值插入gs：//引用！您可以在Firebase控制台的“存储”下找到此内容。

现在我们有了保存用户个人资料图片的方法，让我们创建一个注册新用户的方法，我们可以在IBAction上调用它：

- (void) registerNewUser

{
    NSString *email = emailAddressTxtField.text;
    NSString *password = passwordTxtField.text;
    [[FIRAuth auth]
     createUserWithEmail:email
     password:password
     completion:^(FIRUser *_Nullable user,
                  NSError *_Nullable error)
     {
         if (error)
         {
             NSLog(@"%@", error.localizedDescription);
             return;
         }
         else
         {
             [self saveProfileImage];
         }
     }];
}

哦，太好了！现在，让我们在我们的按钮上调用该方法，以便当用户点击我们的UI上的Register按钮时，它被称为：

- (IBAction)registerUserAction:(id)sender
{

[self registerNewUser];

}

注意：请确保在ViewController.h文件中设置相应的代理：

@interface ViewController : UIViewController <UIImagePickerControllerDelegate, UINavigationControllerDelegate, UITextFieldDelegate>

Firebase在用户注册期间将图像上传到存储

2 个答案: