我有一个 UIPickerview。我有一个json响应。我有一个三个文本字段。如果用户选择第一个文本字段显示选择器视图，则用户选择特定项目。第二个和第三个文本字段也一样。我的要求是如果用户在第一个选择器视图中选择特定项目，第二个和第三个选择器视图不显示该项目。第二和第三也一样。
-(void)viewDidLoad
{
dataArray = [[NSMutableArray alloc]initWithObjects:@"A+",@"A-",@"B+",@"B-",@"O+",@"O-", nil];
bloodGroup = [[UITextField alloc]initWithFrame:CGRectMake(10, logoImg.frame.origin.y+logoImg.frame.size.height+45, screenWidth-20, 50)];
bloodGroup.borderStyle = UITextBorderStyleRoundedRect;
bloodGroup.font = [UIFont systemFontOfSize:15];
bloodGroup.placeholder = @"Please Select Your Option";
bloodGroup.delegate = self;
[self.view addSubview:bloodGroup];
txtField1 = [[UITextField alloc]initWithFrame:CGRectMake(10, ansField1.frame.origin.y+ansField1.frame.size.height+45, screenWidth-20, 50)];
txtField1.borderStyle = UITextBorderStyleRoundedRect;
txtField1.font = [UIFont systemFontOfSize:15];
txtField1.placeholder = @"Please Select Your Option";
txtField1.delegate = self;
[self.view addSubview:txtField1];
txtField2 = [[UITextField alloc]initWithFrame:CGRectMake(10, ansField2.frame.origin.y+ansField2.frame.size.height+45, screenWidth-20, 50)];
txtField2.borderStyle = UITextBorderStyleRoundedRect;
txtField2.font = [UIFont systemFontOfSize:15];
txtField2.placeholder = @"Please Select Your Option";
txtField2.delegate = self;
[self.view addSubview:txtField2];
myPickerView = [[UIPickerView alloc] init];
[myPickerView setDataSource: self];
[myPickerView setDelegate: self];
myPickerView.showsSelectionIndicator = YES;
bloodGroup.inputView = myPickerView;
bloodGroup.inputAccessoryView = toolBar;
// txtField1
txtField1.inputView = myPickerView;
txtField1.inputAccessoryView = toolBar;
txtField2.inputView = myPickerView;
txtField2.inputAccessoryView = toolBar;
}
-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView {
if (isBloodGroupFieldSelected) {
return 1;
}
else if(!isBloodGroupFieldSelected){
return 1;
}
else if(!isGenderGroupFieldSelected)
{
return 1;
}
return 0;
}
-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
{
if (isBloodGroupFieldSelected) {
return [dataArray count];
}
else if(!isBloodGroupFieldSelected)
{
return [dataArray count];
}
else if (!isGenderGroupFieldSelected)
{
return [dataArray count];
}
return 0;
}
-(NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component {
if (isBloodGroupFieldSelected)
{
return dataArray[row];
}
else if((!isBloodGroupFieldSelected) && (isGenderGroupFieldSelected))
{
return dataArray[row];
}
else if(!isGenderGroupFieldSelected)
{
return dataArray[row];
}
return 0;
}
-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component {
if (isBloodGroupFieldSelected) {
bloodGroup.text = dataArray[row];
}
else if((!isBloodGroupFieldSelected) && (isGenderGroupFieldSelected))
{
txtField1.text = dataArray[row];
}
else if(!isGenderGroupFieldSelected)
{
txtField2.text= dataArray[row];
}
}
- (void)textFieldDidBeginEditing:(UITextField *)textField {
if (textField == bloodGroup) {
isBloodGroupFieldSelected = YES;
}
else if (textField == txtField1){
isBloodGroupFieldSelected = NO;
isGenderGroupFieldSelected = YES;
}
else if (textField == txtField2) {
isGenderGroupFieldSelected = NO;
isBloodGroupFieldSelected = NO;
}
[myPickerView reloadAllComponents];
}