ObjectiveC开发教程--如何去除字符串中的空格和回车

去除两端空格  
NSString *temp = [textField.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];  

去除两端空格和回车
NSString *text = [temp stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];