1. 去除首尾空格
NSString *title = [title stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
1. 去除首尾换行
NSString *title = [title stringByTrimmingCharactersInSet:[NSCharacterSet newlineCharacterSet]];
1. 去除首尾空格和换行
NSString *title = [title stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];