我正在尝试使用以下代码将图像保存到parse.com:
NSData *imageData = UIImagePNGRepresentation(profileImage);
PFFile *imageFile = [PFFile fileWithName:@"Profileimage.png" data:imageData];
[imageFile saveInBackground];
PFUser *user = [PFUser currentUser];
user[@"fullName"] = name;
user[@"Location"] = location;
user[@"gender"] = gender;
user[@"email"] = email;
user[@"ProfilePic"] = imageFile;
[user saveInBackground];
问题是这似乎没有保存图像文件以解析,因为我的数据浏览器中没有填充任何内容。这里的代码看起来很好,但是你们可以看到它有什么问题吗?
使用以下代码从Facebook下载图像:
NSURL *pictureURL = [NSURL URLWithString:[NSString stringWithFormat:@"https://graph.facebook.com/%@/picture?type=large&return_ssl_resources=1", facebookID]];
NSData *data = [[NSData alloc] initWithContentsOfURL:pictureURL];
UIImage *profileImage = [[UIImage alloc] initWithData:data];
有什么想法吗?
由于
答案 0 :(得分:11)
问题是,当您致电[imageFile saveInBackground];
[user saveInBackground];
操作
当您调用第一个后台保存时,程序将继续。
改为使用saveInBackgroundWithBlock
,然后在那里执行[user saveInBackground]
操作。
NSData *imageData = UIImagePNGRepresentation(profileImage);
PFFile *imageFile = [PFFile fileWithName:@"Profileimage.png" data:imageData];
[imageFile saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error) {
if (!error) {
if (succeeded) {
PFUser *user = [PFUser currentUser];
user[@"fullName"] = name;
user[@"Location"] = location;
user[@"gender"] = gender;
user[@"email"] = email;
user[@"ProfilePic"] = imageFile;
[user saveInBackground];
}
} else {
// Handle error
}
}];