ios - 当文件名包含 unicode(utf8) 字符时，ios 10.3 中的 fopen 出现问题

Question

我正在尝试在 iOS 10.3 的文档文件夹中创建一个名为“abcó.txt”的文件。 fopen() 成功但未创建文件。知道为什么吗？以下是我的代码。

void test_fopen(){
    const char *docsFolder = [[[[NSFileManager defaultManager] URLsForDirectory:NSDocumentDirectory inDomains:NSUserDomainMask] lastObject] fileSystemRepresentation];
    std::string filePath = std::string(docsFolder) + "/abc";
    char oWithAcute[2] = {(char)0xC3, (char)0xB3, (char)0x00}; // the ó character to append
    filePath = filePath + oWithAcute + ".txt";
    FILE *fp = fopen(filePath.c_str(), "wb");
    NSLog(@"Trying to create file using fopen: %s", filePath.c_str());
    if( fp != NULL ){
        NSLog(@"fopen() SUCCEEDED.");
    }
    else {
        NSLog(@"fopen() FAILED.");
    }
    fclose(fp);

    NSFileManager* fm = [NSFileManager defaultManager];
    NSString *nsStr = [NSString stringWithUTF8String:filePath.c_str()];
    if (![fm fileExistsAtPath: nsStr]) {
        NSLog(@"File is NOT actually created.");
    }
    else{
        NSLog(@"File is actually created.");
    }
}

Answer 1

iOS 10.3 使用新文件系统，请看APFS is currently unusable with most non-English languages

因此需要使用高级 Foundation API:

NSFileManager *fm = [NSFileManager defaultManager];
NSMutableData *data = [NSMutableData data];

...在那里填写数据

[fm createFileAtPath:filePath contents:data attributes:nil];