Ios 将UITextfield整数值发布到web服务器

我有一个

UITextField

，因此我应该只能键入整数（没有文本），然后必须将整数值传递到

NSMutableDictionary

。然后我必须从这本词典发布到Web服务器。

将

UITextField

的键盘类型更改为数字键盘，这样它只需要数字：

[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;
}

- (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);


 }

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

---

你可以试试这样的东西
1.将文本字段“键盘类型”设置为数字键盘

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

---

希望有帮助。

这是做这些事情的最好方法，在NSString类别中做以下几行，并根据需要检查验证

-(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;
}

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

    return NO;
}

- (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，在要发布的按钮操作中创建一个NSMutabledictionary

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

  NSMutableDictionary *datadict=[NSMutableDictionary dictionary];

现在将textfield值传递给nsmutabledictionary以进行发布

  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)

} 其他的 {

现在将值发布到web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);

---

&如何将整数值传递给nsdictionary？？