Objective c 从parse.com下载图片
我想从parse.com下载一个图像文件,并在ImageView“myImageView”中显示它。我为此创建了一个名为“Image”的类和一个列“profilImage”作为文件列。我用那个代码试过了,但还是不行Objective c 从parse.com下载图片,objective-c,image,parse-platform,imageview,Objective C,Image,Parse Platform,Imageview,我想从parse.com下载一个图像文件,并在ImageView“myImageView”中显示它。我为此创建了一个名为“Image”的类和一个列“profilImage”作为文件列。我用那个代码试过了,但还是不行 PFQuery *query = [PFQuery queryWithClassName:@"Image"]; [query getObjectInBackgroundWithId:@"Y7ahcw9ZNR" block:^(PFObject *imageObject, NSErro
PFQuery *query = [PFQuery queryWithClassName:@"Image"];
[query getObjectInBackgroundWithId:@"Y7ahcw9ZNR" block:^(PFObject *imageObject, NSError *error) {
PFFile *theImage = [imageObject objectForKey:@"profilImage"];
NSData *imageData = [theImage getData];
UIImage *yourImage = [UIImage imageWithData:imageData];
NSLog(@"%@", yourImage);
[myImageView setImage:yourImage];
}];
我做错了什么?尝试一下使用PFFile函数。getData是同步的,可能会阻塞UI线程,具体取决于它的使用方式
[theImage getDataInBackgroundWithBlock:^(NSData *data, NSError *error) {
myImageView.image = [UIImage imageWithData:data];
}];
从解析中保存和检索profilePic -目标-c 保存图像以解析currentuser
NSData *imageData = UIImagePNGRepresentation(image);
PFFile *imageFile = [PFFile fileWithName:@"image.png" data:imageData];
[imageFile saveInBackground];
PFUser *user = [PFUser currentUser];
[user setObject:imageFile forKey:@"profilePic"];
[user saveInBackground];
PFUser *cUser = [PFUser currentUser];
PFFile *pictureFile = [cUser objectForKey:@"profilePic"];
[pictureFile getDataInBackgroundWithBlock:^(NSData *data, NSError *error) {
if (!error){
[_profileImage setImage:[UIImage imageWithData:data]];
}
else {
// there is no profile picture.
}
}];
var currentUser = PFUser.currentUser()
let imageData = UIImagePNGRepresentation(image)
let imageFile = PFFile(name:"image.png", data:imageData)
currentUser["profilePic"] = imageFile
currentUser.saveInBackground()
var currentUser = PFUser.currentUser()
let userImageFile = currentUser!["profilePic"] as? PFFile
userImageFile!.getDataInBackgroundWithBlock {
(imageData: NSData?, error: NSError?) -> Void in
if error == nil {
if let imageData = imageData {
self.profileImage.image = UIImage(data:imageData)
}
}
else
{
let errorString = error!.userInfo?["error"] as? String
//there is no profile pic
}
}
从Parse Currentuser检索图像
NSData *imageData = UIImagePNGRepresentation(image);
PFFile *imageFile = [PFFile fileWithName:@"image.png" data:imageData];
[imageFile saveInBackground];
PFUser *user = [PFUser currentUser];
[user setObject:imageFile forKey:@"profilePic"];
[user saveInBackground];
PFUser *cUser = [PFUser currentUser];
PFFile *pictureFile = [cUser objectForKey:@"profilePic"];
[pictureFile getDataInBackgroundWithBlock:^(NSData *data, NSError *error) {
if (!error){
[_profileImage setImage:[UIImage imageWithData:data]];
}
else {
// there is no profile picture.
}
}];
var currentUser = PFUser.currentUser()
let imageData = UIImagePNGRepresentation(image)
let imageFile = PFFile(name:"image.png", data:imageData)
currentUser["profilePic"] = imageFile
currentUser.saveInBackground()
var currentUser = PFUser.currentUser()
let userImageFile = currentUser!["profilePic"] as? PFFile
userImageFile!.getDataInBackgroundWithBlock {
(imageData: NSData?, error: NSError?) -> Void in
if error == nil {
if let imageData = imageData {
self.profileImage.image = UIImage(data:imageData)
}
}
else
{
let errorString = error!.userInfo?["error"] as? String
//there is no profile pic
}
}
-迅捷的
保存图像以解析currentuser
NSData *imageData = UIImagePNGRepresentation(image);
PFFile *imageFile = [PFFile fileWithName:@"image.png" data:imageData];
[imageFile saveInBackground];
PFUser *user = [PFUser currentUser];
[user setObject:imageFile forKey:@"profilePic"];
[user saveInBackground];
PFUser *cUser = [PFUser currentUser];
PFFile *pictureFile = [cUser objectForKey:@"profilePic"];
[pictureFile getDataInBackgroundWithBlock:^(NSData *data, NSError *error) {
if (!error){
[_profileImage setImage:[UIImage imageWithData:data]];
}
else {
// there is no profile picture.
}
}];
var currentUser = PFUser.currentUser()
let imageData = UIImagePNGRepresentation(image)
let imageFile = PFFile(name:"image.png", data:imageData)
currentUser["profilePic"] = imageFile
currentUser.saveInBackground()
var currentUser = PFUser.currentUser()
let userImageFile = currentUser!["profilePic"] as? PFFile
userImageFile!.getDataInBackgroundWithBlock {
(imageData: NSData?, error: NSError?) -> Void in
if error == nil {
if let imageData = imageData {
self.profileImage.image = UIImage(data:imageData)
}
}
else
{
let errorString = error!.userInfo?["error"] as? String
//there is no profile pic
}
}
从Parse Currentuser检索图像
NSData *imageData = UIImagePNGRepresentation(image);
PFFile *imageFile = [PFFile fileWithName:@"image.png" data:imageData];
[imageFile saveInBackground];
PFUser *user = [PFUser currentUser];
[user setObject:imageFile forKey:@"profilePic"];
[user saveInBackground];
PFUser *cUser = [PFUser currentUser];
PFFile *pictureFile = [cUser objectForKey:@"profilePic"];
[pictureFile getDataInBackgroundWithBlock:^(NSData *data, NSError *error) {
if (!error){
[_profileImage setImage:[UIImage imageWithData:data]];
}
else {
// there is no profile picture.
}
}];
var currentUser = PFUser.currentUser()
let imageData = UIImagePNGRepresentation(image)
let imageFile = PFFile(name:"image.png", data:imageData)
currentUser["profilePic"] = imageFile
currentUser.saveInBackground()
var currentUser = PFUser.currentUser()
let userImageFile = currentUser!["profilePic"] as? PFFile
userImageFile!.getDataInBackgroundWithBlock {
(imageData: NSData?, error: NSError?) -> Void in
if error == nil {
if let imageData = imageData {
self.profileImage.image = UIImage(data:imageData)
}
}
else
{
let errorString = error!.userInfo?["error"] as? String
//there is no profile pic
}
}
根据您的问题
PFQuery *query = [PFQuery queryWithClassName:@"Image"];
[query getObjectInBackgroundWithId:@"Y7ahcw9ZNR"
block:^(PFObject *textdu, NSError *error) {
if (!error) {
PFFile *imageFile = [textdu objectForKey:@"profilImage"];
[imageFile getDataInBackgroundWithBlock:^(NSData *data, NSError *error) {
if (!error) {
UIImage *image = [UIImage imageWithData:data];
}
}];
}
}];