我想从 Parse 下载 UIImageView 用户中的图像。在User部分，我创建了UserImage部分，但我无法将其下载到UIImageView中，怎么办？你帮我一把？请帮助我。
我用过这段代码:
PFUser* currentUser = [PFUser currentUser];
if (currentUser) {
PFQuery* queryPhoto = [PFQuery queryWithClassName:@"UserImage"];
[queryPhoto findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
// Verify if there are no errors
if (!error) {
// Retrieve Usename
User.text = [NSString stringWithFormat:@"%@",[[PFUser currentUser]valueForKey:@"username"]] ;
// Retrieve Photo
PFUser *currentuser = [PFUser currentUser];
PFFile *file = [currentuser objectForKey:@"UserImage"];
[file getDataInBackgroundWithBlock:^(NSData *data, NSError *error) {
if (!error) {
UIImage *image = [UIImage imageWithData:data];
// image can now be set on a UIImageView
self.UserImages.image = image;
}
}];
}
else {
NSString *errorString = [[error userInfo] objectForKey:@"error"];
UIAlertView *errorAlertView = [[UIAlertView alloc] initWithTitle:@"Error" message:errorString delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles:nil, nil];
[errorAlertView show];
}
} ];
}
最佳答案
Parse.com 有 PFImageView 专门用于使此任务变得更轻松。
试试这个:
PFUser* currentUser = [PFUser currentUser];
if (currentUser) {
PFQuery* queryPhoto = [PFQuery queryWithClassName:@"UserImage"];
[queryPhoto findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
// Verify if there are no errors
if (!error) {
// Retrieve Usename
User.text = [NSString stringWithFormat:@"%@",[[PFUser currentUser]valueForKey:@"username"]] ;
// Retrieve Photo & Load
PFFile *file = [currentUser objectForKey:@"UserImage"];
PFImageView *imageView = [[PFImageView alloc] init];
self.UserImages.image = imageView; //Assuming here that you set self.UserImages.image as a PFImageView
self.UserImages.image.file = file;
[self.UserImages.image loadInBackground];
}
else {
NSString *errorString = [[error userInfo] objectForKey:@"error"];
UIAlertView *errorAlertView = [[UIAlertView alloc] initWithTitle:@"Error" message:errorString delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles:nil, nil];
[errorAlertView show];
}
}];
}
关于ios - 如何从 UIImageView 中的 "User"类获取用户图像？解析网，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/26203313/