我在项目中使用XLForm,并希望以特定格式显示其中一行的值。
该行是&#34;年营业额&#34;我希望将用户输入的值显示为货币 - 例如,如果用户在表单字段中输入 1000000 ,则应更新该字段以显示: $ 1,000,000.00 < /强>
我该怎么做?
这是在initializeForm()中初始化表单字段的方式:
element->next = list2->front;
//for a double-linked list:
list2->front->prev = element;
根据the documentation,我应该注意到用户已经与字段进行了交互,然后更改了字段的值并更新了该行。
这就是我抓住用户在字段中输入内容的方式:
-(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;
}
答案 0 :(得分:2)
通过重置rowDescriptor
中formRowDescriptorValueHasChanged
的值,创建了无限循环。
我通过更改formRowDescriptorValueHasChanged
来解决此问题,首先检查rowDescriptor
的价值是否已经以货币符号开头,只有在缺少货币符号时才添加:
-(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];
}
}
}