NSString去掉换行符和空白字符

NSString* headerData=***;

headerData = [headerData stringByTrimmingCharactersInSet:[NSCharacterSetwhitespaceAndNewlineCharacterSet]]; //去除掉首尾的空白字符和换行字符

headerData = [headerData stringByReplacingOccurrencesOfString:@"\r"withString:@""];

headerData = [headerData stringByReplacingOccurrencesOfString:@"\n"withString:@""];

如此即可。