在objective－c中去掉字符串前后空格的方法

http://blog.sina.com.cn/s/blog_542185150100zvsb.html

NSString *string = @" spaces in front and at the end "; 
NSString *trimmedString = [string stringByTrimmingCharactersInSet: 
[NSCharacterSet whitespaceAndNewlineCharacterSet]]; 
NSLog(trimmedString)