将 UITextfield 整数值发布到 Web 服务器

Posted 2023-03-12

【中文标题】将 UITextfield 整数值发布到 Web 服务器

【英文标题】：Post UITextfield integer values to web server

【发布时间】：2014-08-19 10:17:09

【问题描述】：

我有一个UITextField，我应该只能输入整数（无文本），然后必须将整数值传递给NSMutableDictionary。然后我必须从这本字典中发布到网络服务器。

【问题讨论】：

***.com/questions/12944789/… & ***.com/questions/10734959/…

如何将整数值传递给nsdictionary？？

【参考方案1】：

将UITextField 的键盘类型更改为数字键盘，使其只输入数字：

[textField setKeyboardType:UIKeyboardTypeNumberPad];

您还可以检查输入的文本是否为数字：

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string

    if (string.length == 0 || [NSScanner scanInt:string]) 
        return YES;
    

    return NO;

您可以使用以下代码将值保存在字典中：

//if you want to save as number
[myDictionary setObject:[NSNumber numberWithInt:[textField.text intValue] forKey:@"YourKey"];

或

//if you want to save as string
[myDictionary setObject:textField.text forKey:@"YourKey"];

【参考方案2】：

//创建一个文本字段

    txt = [[UITextField alloc] initWithFrame:CGRectMake(100, 10, 150, 50)];
    txt.placeholder = @"enter here";
    txt.borderStyle = UITextBorderStyleRoundedRect;
    txt.autocorrectionType = UITextAutocorrectionTypeNo;
    [txt setClearButtonMode:UITextFieldViewModeWhileEditing];
    [txt setKeyboardType:UIKeyboardTypeNumberPad];
    txt.delegate=self;

    [cell.contentView addSubview:txt];

您可以检查输入的文本是否为数字：

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string

NSString *newString = [Height.text stringByReplacingCharactersInRange:range withString:string];
if([newString length] > 3)

    UIAlertView *obj_AlertView=[[UIAlertView alloc]initWithTitle:@""
                                                         message:@"Enter 3 digit only"
                                                        delegate:self
                                               cancelButtonTitle:@"OK"
                                               otherButtonTitles:nil];
    [obj_AlertView show];

    return !([newString length] > 3);


 

现在在您的按钮操作中创建一个 NSMutabledictionary 以发布

 -(IBAction)btnClicked:(id)sender
 
  UIButton *button = (UIButton *)sender;
  button.tintColor=[UIColor redColor];
  NSLog(@"%@",button);

  NSMutableDictionary *datadict=[NSMutableDictionary dictionary];

现在将您的文本字段值传递给 nsmutabledictionary 以发布

  if (txt.text !=NULL) 


    [datadict setValue:[NSNumber numberWithInt:[txt.text intValue]] forKey:@"txt"];

    //    [datadict setObject:[NSString stringWithFormat:@"%@",txt.text] forKey:@"txt"];   (if it is for NSdictionary)

别的

[datadict setObject:[NSString stringWithFormat:@" "] forKey:@"txt"];

现在将值发布到网络服务器

   NSData* jsonData = [NSJSONSerialization dataWithJSONObject:datadict options:kNilOptions error:nil];
   NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
  NSURL *someURLSetBefore =[NSURL URLWithString:@" your post web-server link here"];
  [request setURL:someURLSetBefore];
  [request setHTTPMethod:@"POST"];
  [request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
  [request setValue:@"application/json" forHTTPHeaderField:@"Accept"];
  [request setHTTPBody:jsonData];
  NSError *error;
  NSURLResponse *response;
  NSData *responseData=[NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
  NSString * string1=[[NSString alloc]initWithData:responseData encoding:NSUTF8StringEncoding];
   NSLog(@"%@",string1);

【参考方案3】：

你可以试试这样的 1. 将 textField 'Keyboard Type' 设置为 Number Pad。

2.
NSMutableDictionary *dict=[[NSMutableDictionary alloc]init];
[dict setValue:[NSNumber numberWithInt:[textField.text intValue]] forKey:@"Key"];

希望对你有帮助。

【参考方案4】：

这是执行此类操作的最佳方法，请在 NSString 类别 中创建以下行，并根据您的需要检查验证。

-(NSString *)isTextFieldHasNumberOnly



   NSString *strMessage;
     NSString *enteredText=[self trimWhiteSpace];
    if ([enteredText length]==0) 
    
        strMessage=@"Please enter number.";
        return strMessage;
    

    NSString *numbEx = @"^([0-9]+)?(\\.([0-9]1,2)?)?$";

    NSRegularExpression *numbRegEx = [NSRegularExpression regularExpressionWithPattern:numbEx options:NSRegularExpressionCaseInsensitive error:nil];

    NSUInteger numberOfMatches = [numbRegEx numberOfMatchesInString:enteredText options:0 range:NSMakeRange(0, [enteredText length])];
    if (numberOfMatches == 0)
        strMessage=@"Please enter valid number.";
    else
        strMessage=@"";

    return strMessage;