NSString *str = _textView.text;
    str = [str stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]]; //去除掉首尾的空白字符和换行字符
    str = [str stringByReplacingOccurrencesOfString:@"\r" withString:@""];
    str = [str stringByReplacingOccurrencesOfString:@"\n" withString:@""];
NSLog(@"%@",str);