使用分享扩展在应用之间传递数据

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我是靠谱客的博主壮观大白，最近开发中收集的这篇文章主要介绍使用分享扩展在应用之间传递数据，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

简单的研究了扩展，记录一下

1，创建一个分享扩展

File ----> New --- >Target 出现

在项目中就会出现

要传递数据的需要设置App Groups

在扩展中也设置同样的

调试扩展

在扩展中打开Container App

在扩展中设置跳转的代码

//  在扩展中打开 contaier app 
- (void)openApp {
    NSString *destURLString = @"doubiDemo://";
    UIResponder* responder = self;
    while ((responder = [responder nextResponder]) != nil){
        if([responder respondsToSelector:@selector(openURL:)] == YES){
            [responder performSelector:@selector(openURL:) withObject:[NSURL URLWithString:destURLString]];
            [self.extensionContext completeRequestReturningItems:nil completionHandler:NULL];
        }
    }
}

我做的是从其他应用里面传文件过来，，例如从微信将ppt 传到我们的应用

我简单的理解是将微信中ppt 文件复制到扩展 ,我们的应用在从扩展中去取数据

我的示例代码

#import "ShareViewController.h"
#import <MobileCoreServices/MobileCoreServices.h>
@interface ShareViewController ()

@end

@implementation ShareViewController

-(void)viewDidLoad{
    [super viewDidLoad];
  
    NSExtensionItem *extensionItem = [self.extensionContext.inputItems firstObject];
    
    __weak __typeof(self) __weak_self = self;
    BOOL isExit = YES;
    for(NSItemProvider *itemProvider in [extensionItem attachments]) {
        if ([itemProvider hasItemConformingToTypeIdentifier:(NSString *)kUTTypeFileURL]) {
            isExit = NO;
            [itemProvider loadItemForTypeIdentifier:(NSString *)kUTTypeFileURL options:nil completionHandler:^(id<NSSecureCoding>  _Nullable item, NSError * _Null_unspecified error) {
                
                NSURL *URL = (NSURL *)item;
                if ([URL isFileURL] && [__weak_self copyResToAppGroup:URL])
                    [__weak_self openApp ];
                else
                    [self.extensionContext completeRequestReturningItems:nil completionHandler:NULL];
            }];
        }
    }
    if (isExit) [self.extensionContext completeRequestReturningItems:nil completionHandler:NULL];
}
//  在扩展中打开 contaier app 
- (void)openApp {
    NSString *destURLString = @"doubiDemo://";
    UIResponder* responder = self;
    while ((responder = [responder nextResponder]) != nil){
        if([responder respondsToSelector:@selector(openURL:)] == YES){
            [responder performSelector:@selector(openURL:) withObject:[NSURL URLWithString:destURLString]];
            [self.extensionContext completeRequestReturningItems:nil completionHandler:NULL];
        }
    }
}

// 将文件复制到 app group
- (BOOL) copyResToAppGroup:(NSURL *) sorURL
{
    NSError *error = nil;
    NSFileManager *fileManager = [NSFileManager defaultManager];
    
    NSURL *groupURL = [fileManager containerURLForSecurityApplicationGroupIdentifier:@"group.DoubiDemo"];
    groupURL = [groupURL URLByAppendingPathComponent:@"upload"];
    
    BOOL isDir = NO;
    if (![fileManager fileExistsAtPath:groupURL.relativePath isDirectory:&isDir] && !isDir)
        [fileManager createDirectoryAtURL:groupURL withIntermediateDirectories:YES attributes:nil error:&error];
    
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    [dateFormatter setDateFormat:@"yyyyMMddHHmmss"];
    NSString *currentDateStr = [dateFormatter stringFromDate:[NSDate date]];
    NSString *name = [[sorURL lastPathComponent] stringByDeletingPathExtension];
    NSString *ext = [sorURL pathExtension];
    
    groupURL = [groupURL URLByAppendingPathComponent:[NSString stringWithFormat:@"%@-%@.%@", name, currentDateStr, ext]];
  
    return [fileManager copyItemAtURL:sorURL toURL:groupURL error:&error];
}

注意：需要 #import <MobileCoreServices/MobileCoreServices.h>