在我的应用程序中,我查询Parse.com以获取填充UIPickerView的组列表。我想在最顶层的UIPickerView中添加一个名为“Create New Group”的选项,其中它将拉出一个UITextField以创建一个新组并从那里移动。如何将其添加到所有其他字段?到目前为止,我是如何创建它的。
-(void)addPickerView{
__block NSMutableArray *arr = [[NSMutableArray alloc] init];
PFQuery *rejectedNumber = [PFQuery queryWithClassName:@"Group"];
[rejectedNumber orderByAscending:@"GroupName"];
[rejectedNumber findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
if (!objects) {
// Did not find any UserStats for the current user
NSLog(@"NotFound");
} else {
pickerArray = objects;
[myPickerView reloadAllComponents];
}
}];
//pickerArray = GoGo;
self.theView.signUpView.additionalField.delegate = self;
[self.theView.signUpView.additionalField setPlaceholder:@"Choose Group"];
myPickerView = [[UIPickerView alloc]init];
myPickerView.dataSource = self;
myPickerView.delegate = self;
myPickerView.showsSelectionIndicator = YES;
UIBarButtonItem *doneButton = [[UIBarButtonItem alloc]
initWithTitle:@"Done" style:UIBarButtonItemStyleDone
target:self action:@selector(finishIt)];
UIToolbar *toolBar = [[UIToolbar alloc]initWithFrame:
CGRectMake(0, self.view.frame.size.height-
self.theView.signUpView.additionalField.frame.size.height-50, 320, 50)];
[toolBar setBarStyle:UIBarStyleBlackOpaque];
NSArray *toolbarItems = [NSArray arrayWithObjects:
doneButton, nil];
[toolBar setItems:toolbarItems];
self.theView.signUpView.additionalField.inputView = myPickerView;
self.theView.signUpView.additionalField.inputAccessoryView = toolBar;
}
#pragma mark - Picker View Data source
-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView{
return 1;
}
-(NSInteger)pickerView:(UIPickerView *)pickerView
numberOfRowsInComponent:(NSInteger)component{
return [pickerArray count];
}
#pragma mark- Picker View Delegate
-(void)pickerView:(UIPickerView *)pickerView didSelectRow:
(NSInteger)row inComponent:(NSInteger)component{
[self.theView.signUpView.additionalField setText:self.theGroup];
}
- (NSString*)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
{
PFObject *object = pickerArray[row];
//Assuming "Category" is a string here for your title
self.theGroup = object[@"GroupName"];
return object[@"GroupName"];
}
答案 0 :(得分:1)
您可以通过两种方式添加实现:
UIPickerView
的方法。像:
-(NSInteger)pickerView:(UIPickerView *)pickerView
numberOfRowsInComponent:(NSInteger)component
{
return [pickerArray count] + 1; // +1 for the additional row
}
-(void)pickerView:(UIPickerView *)pickerView didSelectRow:
(NSInteger)row inComponent:(NSInteger)component
{
if (row == 0)
{
// Create New Group clicked
}
else
{
// Some other option selected
}
}
- (NSString*)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
{
NSString *groupName = "Create New Group";
if (row != 0)
{
PFObject *object = pickerArray[row - 1]; // -1 to handle the array index
self.theGroup = object[@"GroupName"];
groupName = object[@"GroupName"];
}
return groupName;
}