iOS 根据文件名获取到文件路径

根据文件名来获取文件路径（Document目录下）

//根据文件名来获取文件路径  
- (NSString *)dataFilePath:(NSString *)sender {  
    NSArray *path = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,  
                NSUserDomainMask,   
                YES);  
    NSString *documentDirectory = [path objectAtIndex:0];  
    return [documentDirectory stringByAppendingPathComponent:sender];  
}  
resource目录下

NSString *defaultDBPath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:filename];  

Cache目录下

NSArray *cache = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);     
   NSString *cachePath = [cache objectAtIndex:0] ;     
        
   NSString *voiceName = [cachePath stringByAppendingPathComponent:[sender stringByAppendingString:@".wav"]];