Reading a file in Objective-C can be achieved using the NSFileManager and NSData classes. Here's an example of how to read a file:
``objective-c
// Get the file path
NSString *filePath = [[NSBundle mainBundle] pathForResource:@"myFile" ofType:@"txt"];
// Read the file into an NSData object
NSData *data = [NSData dataWithContentsOfFile:filePath];
// Convert the data into an NSString
NSString *stringData = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
// Print the contents of the file
NSLog(@"File Contents : %@", stringData);
`
In the example above, we first obtain the file path where the file is stored using the pathForResource:ofType: method of NSBundle. Then we read the contents of the file into an NSData object using the dataWithContentsOfFile: method of NSData. Finally, we convert the data into an NSString using the initWithData:encoding: method of NSString and print its contents using NSLog`.