How to get all the pdf files avalable in interanal storage of iphone in react native using native module

Question

我想知道如何使用目标 c 访问本机模块中 iphone 内部存储中存在的 .pdf 列表

Answer 1

You can implement simple native module in your xcode project to return list of files from the document directory of your app to react native eg:

FileList.h

#import <React/RCTBridgeModule.h>

@interface FileList : NSObject <RCTBridgeModule>
@end

FileList.m

#import "FileList.h"

@implementation FileList

RCT_EXPORT_MODULE(FileList)

RCT_EXPORT_METHOD(get:(NSString *)extension callback:(RCTResponseSenderBlock)callback) {
    NSString *documentsDir = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES).firstObject;
    NSArray *files = [NSFileManager.defaultManager contentsOfDirectoryAtPath:documentsDir error:nil];
    NSPredicate *predicate = [NSPredicate predicateWithFormat:@"self ENDSWITH %@", extension];
    NSArray *filtered = [files filteredArrayUsingPredicate:predicate];
    callback(@[filtered]);
}
@end

How to use:

import {
    ...
    NativeModules,
} from 'react-native';

...

NativeModules.FileList.get('pdf', list => {
    print(list); // Prints: file1.pdf, file2.pdf etc.
});