objective-c - 我收到有关 stringWithContentsOfFile、参数 usedEncoding 的警告？

Question

我只是试了一下:

NSString *docPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Docs/data.txt"];
NSString *dataFile = [NSString stringWithContentsOfFile:docPath usedEncoding:NSUTF8StringEncoding error:NULL];

使用这个，我有这个警告:

Incompatible integer to pointer conversion sending 'int' to parameter of type 'NSStringEncoding *' (aka 'unsigned int *');

怎么了？

Answer 1

代替

NSString *dataFile = [NSString stringWithContentsOfFile:docPath usedEncoding:NSUTF8StringEncoding error:NULL];

使用

NSString *dataFile = [NSString stringWithContentsOfFile:docPath 
                                           encoding:NSUTF8StringEncoding 
                                                  error:NULL];