iphone - 图片没有上传到服务器

Question

我想将图像从设备上传到服务器。但是它没有上传!甚至我的返回成功值也显示为空。成功值应该是 1 或 0。我的代码在这里给出。请告诉我我的代码是否有任何错误。预先感谢您的帮助。

-(void)ImageUpload{

NSString *urlString = [NSString stringWithFormat:@"%@upload.php", APIheader];

NSString *postLength = [NSString stringWithFormat:@"%d", [imgDATA length]];

NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setHTTPMethod:@"POST"];
[request setURL:[NSURL URLWithString:urlString]];
[request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
[request setValue:postLength forHTTPHeaderField:@"Content-Length"];
[request setHTTPBody:imgDATA];

NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
if (connection) {

    NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
    NSString *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];

    NSLog(@"return string: %@",returnString);

    returnString = [returnString stringByReplacingOccurrencesOfString:@"(" withString:@"["];
    returnString = [returnString stringByReplacingOccurrencesOfString:@")" withString:@"]"];
    returnString = [returnString stringByReplacingOccurrencesOfString:@";" withString:@""];
    SBJsonParser *parser = [[SBJsonParser alloc]init];
    NSArray *array = (NSArray *)[parser objectWithString:returnString error:nil];
    NSString *status = [NSString stringWithFormat:@"%@",[[array objectAtIndex:0]objectForKey:@"success"]];

    if ([status isEqualToString:@"1"]) {

        NSLog(@"Image Updated");
    }
    else{

        NSLog(@"status is: %@",status);
    }
}

[request release];

}

Answer 1

您可以使用 CoreGraphics 的方法 UIImagePNGRepresentation(UIImage *image)，它返回 NSData 并保存它。如果您想再次将其转换为 UIImage，请使用 [UIimage imageWithData:(NSData *data)] 方法创建它。与此相关的一些问题 post image to server in iphone和 How to convert image into binary format in iOS?就像给出相同答案 3 次一样。

- (void)sendImageToServer {
       UIImage *yourImage= [UIImage imageNamed:@"image.png"];
       NSData *imageData = UIImagePNGRepresentation(yourImage);
       NSString *postLength = [NSString stringWithFormat:@"%d", [imageData length]];

       // Init the URLRequest
       NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
       [request setHTTPMethod:@"POST"];
       [request setURL:[NSURL URLWithString:[NSString stringWithString:@"http://yoururl.domain"]]];
       [request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
       [request setValue:postLength forHTTPHeaderField:@"Content-Length"];
       [request setHTTPBody:imageData];

       NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
       if (connection) {
          // response data of the request
       }
       [request release];
 }