ios - cloudsight cloudSightQuery 参数设置为空

Question

为了好玩，我正在尝试将 CloudSight API 实现到 iOS Objective C 项目中，但是由于某些原因，当我尝试将图像发送到 cloudSight 时，cloudSightQuery 参数都设置为 null。

我已将 CloudSight 作为 Cocoapod 添加到我的应用程序中，并且一切正常加载，当我在下面执行这段代码时，它永远不会从服务器返回任何类型的响应，事实上我什至不确定它是否发送。

firstview.h

#import <UIKit/UIKit.h>


#import "CloudSight.h"
#import <CloudSight/CloudSightQueryDelegate.h>


@interface FirstViewController : UIViewController <CloudSightQueryDelegate>
{
    CloudSightQuery *cloudSightQuery;
}

- (void)searchWithImage;
- (NSData *)imageAsJPEGWithQuality:(float)quality;

@end

firstview.m

#import "FirstViewController.h"
#import <CoreLocation/CoreLocation.h>
#import "CloudSightConnection.h"
#import "UIImage+it_Image.h"
#import <CloudSight/CloudSightQuery.h>


@interface FirstViewController ()

@end

@implementation FirstViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    cloudSightQuery.queryDelegate = self;
    [self searchWithImage];
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

- (void)searchWithImage {
    UIImage * myImage = [UIImage imageNamed: @"car.jpg"];
    NSData *imageData = [self imageAsJPEGWithQuality:0.7 image:myImage];




    // Start CloudSight
    cloudSightQuery = [[CloudSightQuery alloc] initWithImage:imageData
                                                  atLocation:CGPointZero
                                                withDelegate:self
                                                 atPlacemark:nil
                                                withDeviceId:@""];

    [cloudSightQuery start];
}

#pragma mark CloudSightQueryDelegate

- (void)cloudSightQueryDidFinishIdentifying:(CloudSightQuery *)query {
    if (query.skipReason != nil) {
        NSLog(@"Skipped: %@", query.skipReason);
    } else {
        NSLog(@"Identified: %@", query.title);
    }
}

- (void)cloudSightQueryDidFail:(CloudSightQuery *)query withError:(NSError *)error {
    NSLog(@"Error: %@", error);
}

#pragma mark image
- (NSData *)imageAsJPEGWithQuality:(float)quality image:(UIImage *)image
{
    return UIImageJPEGRepresentation(image, quality);
}



@end

这是库:https://libraries.io/github/cloudsight/cloudsight-objc

Answer 1

我们刚刚更新了库以使这一点更加清晰。您可以运行 pod update CloudSight 来获取新版本。

此类问题的最典型原因是从未调用委托(delegate)。通常，这意味着委托(delegate)对象在被回调之前被释放，但是在这种情况下，它在分配时看起来像是 nil。

这里是这一行:

cloudSightQuery.queryDelegate = self;
[self searchWithImage];

应该改为:

[self searchWithImage];

然后在方法实现中更改初始化并开始:

// Start CloudSight
cloudSightQuery = [[CloudSightQuery alloc] initWithImage:imageData
                                              atLocation:CGPointZero
                                            withDelegate:self
                                             atPlacemark:nil
                                            withDeviceId:@""];
cloudSightQuery.queryDelegate = self;
[cloudSightQuery start];

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