我在我的项目中使用XLForm,并希望以特定格式显示行之一的值。

该行是“年营业额”,我想显示用户输入的货币值-例如,如果用户在表单字段中输入 1000000 ,则该字段应更新为显示: $ 1,000,000.00

我怎么做?

这是在initializeForm()中初始化表单字段的方式:

-(void)initializeForm
{

    // Other fields in the form...

    // Annual turnover Section
    self.section = [XLFormSectionDescriptor formSectionWithTitle:formLabel8AnnualTurnover];
    //section.footerTitle = @"Describe new products";
    [self.formDescriptor addFormSection:self.section];

    // Annual turnover
    self.row = [XLFormRowDescriptor formRowDescriptorWithTag:formField8AnnualTurnover rowType:XLFormRowDescriptorTypeText title:nil];
    self.row.required = NO;
    rowDescriptor8AnnualTurnover = self.row;
    [self.section addFormRow:self.row];

    // Other fields in the form...

    self.form = self.formDescriptor;

}

根据the documentation,我应该发现用户已经与该字段进行了交互,然后更改了该字段的值并更新了该行。

这就是我发现用户在该字段中输入了一些内容的方法:
-(void)formRowDescriptorValueHasChanged:(XLFormRowDescriptor *)rowDescriptor oldValue:(id)oldValue newValue:(id)newValue
{
        [super formRowDescriptorValueHasChanged:rowDescriptor oldValue:oldValue newValue:newValue];

        // Get the current form values
        formValues = [self.form formValues];

        int i = 0;

        if ([rowDescriptor.tag hasPrefix:formField8AnnualTurnover]){
                NSString *annualTurnoverValue = [(XLFormOptionsObject*)formValues[formField8AnnualTurnover] displayText];
                rowDescriptor8AnnualTurnover.value = [NSString stringWithFormat:@"R %@", annualTurnoverValue]; //This breaks.
                [self reloadFormRow:rowDescriptor8AnnualTurnover];
            }
}

最佳答案

通过在rowDescriptor中重置formRowDescriptorValueHasChanged的值来创建无限循环。

我通过更改formRowDescriptorValueHasChanged来解决此问题,首先检查rowDescriptor的值是否已经以货币符号开头,并且仅在缺少时才添加它:

-(void)formRowDescriptorValueHasChanged:(XLFormRowDescriptor *)rowDescriptor oldValue:(id)oldValue newValue:(id)newValue
{

   [super formRowDescriptorValueHasChanged:rowDescriptor oldValue:oldValue newValue:newValue];

   // Get the current form values
   formValues = [self.form formValues];
   if ([rowDescriptor.tag hasPrefix:formField8AnnualTurnover]){
        NSString *annualTurnoverValue = [(XLFormOptionsObject*)formValues[formField8AnnualTurnover] displayText];
        if([annualTurnoverValue hasPrefix:@"R "]){
            // Do nothing - the value will simply be increased.
        }else{
            rowDescriptor8AnnualTurnover.value = [NSString stringWithFormat:@"R %@", annualTurnoverValue];
            [self reloadFormRow:rowDescriptor8AnnualTurnover];
        }
    }
}

关于ios - 如何格式化XLForm行值,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/33125909/

10-12 05:41