Question

我几天都试图找到这个答案而且找不到任何东西。我将url存储到我的数据库中的图像，我试图获取此URL并将图像加载到ImageView。

用户上传图像，我的PHP脚本为数据库中的图像创建了一个URL。这是我的数据库表：ID - ＆gt;用户名 - ＆gt;密码 - ＆gt; urlImage。我有另一个PHP脚本，它接受用户名和urlImage的问题。

在Xcode中我想添加：` NSUserDefaults * settings = [NSUserDefaults standardUserDefaults]; NSString * user = [settings valueForKey：@“username”];

NSString *post = [NSString stringWithFormat:@"username=%@&image=dummy",user];

NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease];

[request setURL:[NSURL URLWithString:@"http://url.com/Wish_Profile_Pic.php"]];
NSString *postLen = [[NSString alloc] initWithFormat:@"%d" ,[post length ]];
[request setValue:postLen forHTTPHeaderField:@"Content-Length"];
[request setHTTPMethod:@"POST"];
[request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"content-type"];
//this is hard coded based on your suggested values, obviously you'd probably need to make this more dynamic based on your application's specific data to send

[request setHTTPBody:[post dataUsingEncoding:NSUTF8StringEncoding]];

[[NSURLConnection alloc] initWithRequest:request delegate:self];

`

这将向数据库服务器发送请求，服务器将输出urlImage。如何在ImageView中查看图像？无法找到任何相关信息。

Answer 1

NSString *post = [NSString stringWithFormat:@"username=%@&image=dummy",use];

NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease];
[request setURL:[NSURL URLWithString:@"http://url.com/Wish_Profile_Pic.php"]];
NSString *postLen = [[NSString alloc] initWithFormat:@"%d" ,[post length ]];
[request setValue:postLen forHTTPHeaderField:@"Content-Length"];
[request setHTTPMethod:@"POST"];
[request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"content-type"];
[request setHTTPBody:[post dataUsingEncoding:NSUTF8StringEncoding]];

[NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *r, NSData *data, NSError *e) {
    if(data.length) {
        UIImage *img = [[[UIImage alloc] initWithData:data] autorelease];

        //try base64 
        if(!img) {
            //NEEDS http://projectswithlove.com/projects/NSData_Base64.zip
           id b64 = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding] autorelease];
           id data2 = [NSData dataFromBase64String:b64];
           img = [[[UIImage alloc] initWithData:data2] autorelease];
        }
        if(img)
            self.imageView.image = img;
    }
    else if(e)
        NSLog(@"%@", e);
}];

将图像从MYSQL加载到Imageview中

1 个答案: