获取/制作来自视频网址的缩略图，以获得API响应 [英] Get / Make thumbnail image from video url getting in API response

问题描述

我在服务器的响应中获取视频网址（即来自未存储在本地设备中的API），如下所示;

I am getting video URLs in the response from server (i.e from API not stored in local-device) as follwos ;

videos": [
    "<iframe width=\\"560\\" height=\\"315\\" src=\\"//www.youtube.com/embed/-OB7y6ELDks?list=UUYv2cbGZE2SmAYPDZQRKiig\\" frameborder=\\"0\\" allowfullscreen></iframe>",
    "<iframe width=\\"560\\" height=\\"315\\" src=\\"//www.youtube.com/embed/igcIaNi-eHA?list=UUYv2cbGZE2SmAYPDZQRKiig\\" frameborder=\\"0\\" allowfullscreen></iframe>",
    "<iframe width=\\"560\\" height=\\"315\\" src=\\"//www.youtube.com/embed/3kGNMUfajJc?list=UUYv2cbGZE2SmAYPDZQRKiig\\" frameborder=\\"0\\" allowfullscreen></iframe>"    
],

目前它只包含youtube视频，但不确定，它还可能包含来自其他资源的网址视频（即除youtube之外的其他资源）。

Currently it contains only youtube videos, but it is not sure, it may also contain url videos from other resources (i.e other than youtube).

我从此响应中提取了你的网址并希望在UICollectionView中显示这些视频的缩略图。

I extracted youtube urls from this response. And want to display thumbnails of these videos in the UICollectionView.

我该怎么办？

I对此进行了大量搜索，但无法得到任何正确的解决方案。

I searched a lot about this but could not get any proper solution.

请帮帮我。

谢谢..

推荐答案

我使用以下代码解决了我的问题。

I have solved my problem using following code.

所以我在这里附加代码供其他人参考;

So I am attaching code here for others reference ;

-(void)setImage:(NSString*)urlResponse
{
    NSString *youtubeUrl = [NSString stringWithFormat:@"%@",[self parseVideoHTMLUrl: urlResponse]];

    NSString *videoThumbUrl = [self getYoutubeVideoThumbnail: youtubeUrl];

    NSURL* videoURL =[NSURL URLWithString:videoThumbUrl];

    [btn_photo sd_setImageWithURL:videoURL forState:UIControlStateNormal]; 
}

-(NSString *)parseVideoHTMLUrl:(NSString *)videoUrl
{
    NSRegularExpression *regex = [NSRegularExpression
                                  regularExpressionWithPattern:@";//(.+?)\\""
                                  options:NSRegularExpressionCaseInsensitive
                                  error:nil];
    NSTextCheckingResult *textCheckingResult = [regex firstMatchInString:videoUrl options:0 range:NSMakeRange(0, videoUrl.length)];

    NSString *url = [videoUrl substringWithRange:[textCheckingResult rangeAtIndex:1]];

    return url;
}

-(NSString*)getYoutubeVideoThumbnail:(NSString*)youTubeUrl
{
    NSString* video_id = @"";

    if (youTubeUrl.length > 0)
    {
        NSError *error = NULL;
        NSRegularExpression *regex =
        [NSRegularExpression regularExpressionWithPattern:@"(?<=watch\\?v=|/videos/|embed\\/)[^#\\&\\?]*"
                                                  options:NSRegularExpressionCaseInsensitive
                                                    error:&error];
        NSTextCheckingResult *match = [regex firstMatchInString:youTubeUrl
                                                        options:0
                                                          range:NSMakeRange(0, [youTubeUrl length])];
        if (match)
        {
            NSRange videoIDRange = [match rangeAtIndex:0];
            video_id = [youTubeUrl substringWithRange:videoIDRange];

            NSLog(@"%@",video_id);
        }
    }

    NSString* thumbImageUrl = [NSString stringWithFormat:@"http://img.youtube.com/vi/%@/default.jpg",video_id];

    return thumbImageUrl;
}

这篇关于获取/制作来自视频网址的缩略图，以获得API响应的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！