LPLinkView的用法

LPLinkView 是官方iOS13开始提供的一种链接预览的超级方便的view实现。

LPLinkView presents a link based on its available metadata. Use it to show a link’s title and icon, associated images, inline audio, video playback, and maps in a familiar and consistent style.

意思大概是 LPLinkView根据其可用的元数据显示一个链接。使用它可以以熟悉且一致的样式显示链接的标题和图标，关联的图像，嵌入式音频，视频播放和地图。

其简单的使用方法如下：

#import "ViewController.h"
#import <LinkPresentation/LPMetadataProvider.h>
#import <LinkPresentation/LPLinkView.h>
@interface ViewController ()

@property (nonatomic ,strong) LPLinkMetadata *linkMetadata;
@property (nonatomic ,strong) LPLinkView *linkView;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    LPMetadataProvider *pv = [LPMetadataProvider new];
    NSString *url = @"https://www.baidu.com";
    __weak typeof(self) weakSelf = self;
    [pv startFetchingMetadataForURL:[NSURL URLWithString:url] completionHandler:^(LPLinkMetadata * _Nullable metadata, NSError * _Nullable error) {
        if (!error) {
            weakSelf.linkMetadata = metadata;
        }
    }];
}

- (void)setLinkMetadata:(LPLinkMetadata *)linkMetadata {
    _linkMetadata = linkMetadata;
    dispatch_async(dispatch_get_main_queue(), ^{
        self.linkView = [[LPLinkView alloc] initWithMetadata:linkMetadata];
        self.linkView.frame = CGRectMake(10, 80, 300, 600);
        [self.view addSubview:self.linkView];
        [self.linkView sizeToFit];
    });
}

运行结果如图

0zm57120008ajnx04B4EF.png