Xcode的应用程序可以为二进制不能打开文件读取

问题描述:

我试图打开一个文件“d.mp3”我加入到我的Xcode 8.0项目。
如果我双击Xcode>项目>'d.mp3'文件播放就好了。
但是,当Xcode在我的iPhone6 +(iOS 10.0.1)上运行我的应用程序时,fopen()为文件句柄返回0。Xcode的应用程序可以为二进制不能打开文件读取

代码和下面输出...

bool read_next_chunk(char* relative_file_pathname, unsigned char* chunk_buffer, int chunk_size_bytes, FILE* file_handle ) 

{ 常量布尔DBG = TRUE;

// Get absolute file pathname: 
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, 
                 NSUserDomainMask, YES); 
    NSString *program_directory = [paths objectAtIndex:0]; 
    NSString* absolute_pathname = [NSString stringWithFormat: @"%@/%s", program_directory, relative_file_pathname ]; 

if(dbg) printf("\n%s: file '%s'. Path '%s'.", __FUNCTION__, relative_file_pathname, [absolute_pathname UTF8String]); 

// Open file if not already open: 
if(file_handle == NULL) 
{ 
    if(dbg) printf("\n%s Open file %s.", __FUNCTION__, relative_file_pathname); 
    file_handle = fopen([absolute_pathname UTF8String], "rb");   // open for binary reading 
    if(dbg) printf("\n%s file_handle %d.", __FUNCTION__, file_handle); 
} 
if(file_handle) 
{ 
    // Read next chunk of file into file_content_string: 
    int total_read_bytes = (int)fread(chunk_buffer, 1, chunk_size_bytes, file_handle); 
    if(total_read_bytes != chunk_size_bytes) 
    { 
     printf("\n %s: %d total_read_bytes != %d chunk_size_bytes -- FAULT!! <<<<<<<<<<<",__FUNCTION__, total_read_bytes, chunk_size_bytes); 
     return false; 
    } 
    return true; 
} 
else 
{ 
    printf("\ %s: Cannot open '%s' FAULT!! <<<<<<<<<<<", __FUNCTION__, relative_file_pathname); 
    return false; 
} 

}

read_next_chunk:文件 'd.mp3'。路径'/var/mobile/Containers/Data/Application/C8B87C49-C6CF-4677-B775-6B3DF6EFD908/Documents/d.mp3'。
read_next_chunk打开文件d.mp3。
read_next_chunk file_handle 0. read_next_chunk:无法打开'd.mp3'FAULT !! < < < < < < < < < < <

+0

如果文件捆绑在您的应用程序中,它将不会在Documents文件夹中。使用'NSBundle'访问它。 – rmaddy

正如rmaddy说,它很可能不是在你的文档目录。试试这样的:

NSString* filePath = [[NSBundle mainBundle] pathForResource:@"d" ofType:@"mp3"];