检索附加到 currentUser / Parse 的照片答案

【问题标题】：Retrieve photo attached to currentUser / Parse检索附加到 currentUser / Parse 的照片
【发布时间】：2015-06-11 20:09:04
【问题描述】：

我在检索附加到 currentUser 的图像时遇到问题。这是我用来保存要解析的信息的代码。

-(IBAction)saveButtonAction:(id)sender {

PFUser *currentUserSave = [PFUser currentUser];

userBioString = userBio.text;
genderFieldString = genderField.text;
ageFieldString = ageField.text;

profilePictureData = UIImageJPEGRepresentation(profilePicture.image, .05f);
PFFile *userProfilePictureFileContainer = [PFFile fileWithData:profilePictureData];

currentUserSave[@"userBioParse"] = userBioString;
currentUserSave[@"userGenderParse"] = genderFieldString;
currentUserSave[@"ageFieldParse"] = ageFieldString;
[currentUserSave setObject:userProfilePictureFileContainer forKey:@"userPictureParse"];
userImageData = UIImageJPEGRepresentation(profilePicture.image, 0.5);
userProfileImageFile = [PFFile fileWithData:userImageData];
[currentUserSave setObject:userProfileImageFile forKey:@"userPictureParse"];



[[PFUser currentUser] saveInBackground];

基本上，现在我正在尝试回调信息以加载用户个人资料。这是我到目前为止所拥有的（不多）。

PFQuery *queryUser = [PFUser query];
[queryUser whereKey:@"username" equalTo:[[PFUser currentUser]username]];
[queryUser getFirstObjectInBackgroundWithBlock:^(PFObject *object, NSError *error){


    PFFile *theImage = [object objectForKey:[PFUser currentUser][@"userPictrueParse"]];
    NSData *imageData = [theImage getData];
    UIImage *profileImage = [UIImage imageWithData:imageData];

    if (profileImage == nil) {
        profilePicture.image = [UIImage imageNamed:@"765-default-avatar.png"];
    } else {
        profilePicture.image = profileImage;
    }

}];

【问题讨论】：

您可能已经有了答案，但我看到一个拼写错误：您使用密钥“userPictureParse”保存并使用“userPictrueParse”检索它。您的日志中有任何错误吗？

标签： ios objective-c parse-platform uiimageview pffile

【解决方案1】：

您可以使用 ParseImageView 代替 ImageView 并通过以下代码设置图像-

try{
    ParseFile image = ParseUser.getCurrentUser().getParseFile("picture");
    if (image != null) {

        parseImgView.setParseFile(image);
        parseImgView.loadInBackground();
    }
}catch(Exception e)
{
    e.printStackTrace();
}

【讨论】：

这比我一直在看的其他东西要简单得多。谢谢。

【解决方案2】：

将图像文件上传到 Parse 可能存在问题，因此您还必须保存 parse-image-file “userProfilePictureFileContainer”。因此，通过以下代码更改您的方法-

-(IBAction)saveButtonAction:(id)sender {

    PFUser *currentUserSave = [PFUser currentUser];

    userBioString = userBio.text;
    genderFieldString = genderField.text;
    ageFieldString = ageField.text;

    profilePictureData = UIImageJPEGRepresentation(profilePicture.image, .05f);
    PFFile *userProfilePictureFileContainer = [PFFile fileWithData:profilePictureData];

    [userProfilePictureFileContainer saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error)
    {
        if (!error) {
            //IMAGE SAVED NOW SET TO USER

        currentUserSave[@"userBioParse"] = userBioString;
        currentUserSave[@"userGenderParse"] = genderFieldString;
        currentUserSave[@"ageFieldParse"] = ageFieldString;
        [currentUserSave setObject:userProfilePictureFileContainer forKey:@"userPictureParse"];
        userImageData = UIImageJPEGRepresentation(profilePicture.image, 0.5);
        userProfileImageFile = [PFFile fileWithData:userImageData];
        [currentUserSave setObject:userProfileImageFile forKey:@"userPictureParse"];

        [[PFUser currentUser] saveInBackground];
        }
        else
        {
        // ERROR OCCURED
        }
    }];
}

【讨论】：

哦，不，不，对不起，误会了。我没有任何问题保存我在从解析中检索文件时遇到问题。

【解决方案3】：

对于任何有同样问题的人，我必须做的就是将我的 profilePicture 类从 UIImageView 切换到 PFImageView。完成后，我可以使用此代码从解析中调用文件。

PFUser *currentuser = [PFUser currentUser];
PFFile *pictureFile = [currentuser objectForKey:@"userPictureParse"];
profilePicture.file = pictureFile;
[profilePicture loadInBackground];

超级超级简单。谢谢大家的帮助。

【讨论】：