直接来代码

NSString *str = @" i love china ";
[str stringByTrimmingCharactersInSet:[NSCharacterSet  whiteSpaceCharactersSet]];
NSLog(@"%@",str);

直接来代码

NSString *str = @" i love china ";
[str stringByTrimmingCharactersInSet:[NSCharacterSet  whiteSpaceCharactersSet]];
NSLog(@"%@",str);