I have an UIPickerView inside an UIActionSheet and have done that in a way suggested by many others here at SO:
Add UIPickerView & a Button in Action sheet - How?
how to add UIPickerView in UIActionSheet
The solutions have worked fine until now when testing my app on iOS 7. It still works but I got a lot of "invalid context 0x0" warnings during runtime in Xcode.
The errors are coming with a nice message too:
CGContextSetFillColorWithColor: invalid context 0x0. This is a serious error. This application, or a library it uses, is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update.
Could it be that Apple finally want to stop this kind of solution or is it something we can work around or fix?
A workaround for this 'invalid context 0x0' warning is to init the UIActionSheet with a non nil title (non-nil buttons also resolve the error but result in visual artefacts).
UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:@""
delegate:nil
cancelButtonTitle:nil
destructiveButtonTitle:nil
otherButtonTitles:nil];
You will then need to adjust the actionsheet's frame for it to position properly in both iOS7 and previous versions (make sure to do this after the showInView method).
CGRect newFrame = actionSheet.frame;
newFrame = self.view.bounds.size.height - myCustomPicker.frame.size.height;
newFrame = myCustomPicker.frame.size.height;
actionSheet.frame = newFrame;
As the comments above point out, the UIActionSheet is not designed to be subclassed or take other views.
More info here at Apple:
https://developer.apple.com/library/ios/documentation/uikit/reference/UIActionSheet_Class/Reference/Reference.html#//apple_ref/doc/uid/TP40006801-CH3-DontLinkElementID_2
One approach is to look closer at the DateCell sample code and change that to use an UIPickerView instead:
https://developer.apple.com/library/ios/samplecode/DateCell/Introduction/Intro.html#//apple_ref/doc/uid/DTS40008866-Intro-DontLinkElementID_2
-(void)viewDidLoad
{
[super viewDidLoad];
// Make Your own Action sheet
myCustomeActionSheet=[[UIView alloc] initWithFrame:CGRectMake(0,self.view.frame.size.height+1,self.view.frame.size.width,215)];
myCustomeActionSheet.backgroundColor=[UIColor whiteColor];
[self.view addSubview:myCustomeActionSheet];
}
// Use this code To Open Date Picker Or UiPicker View
-(void)OpenActionSheet:(Boolean)isDatePickere
{
SelectedString=Nil;
if (datepickerView) {
[datepickerView removeFromSuperview];
datepickerView=Nil;
}
if (picker) {
[picker removeFromSuperview];
picker=Nil;
}
if (isDatePickere)
{
// Add the Datepicker
datepickerView= [[UIDatePicker alloc] init];
datepickerView.datePickerMode = UIDatePickerModeDateAndTime;
datepickerView.minimumDate=[NSDate date];
[myCustomeActionSheet addSubview:datepickerView];
}
else
{
// Add Picker View
picker = [[UIPickerView alloc] initWithFrame:CGRectMake(0,40, 320, 216)];
picker.showsSelectionIndicator=YES;
picker.dataSource = self;
picker.delegate = self;
[myCustomeActionSheet addSubview:picker];
}
UIToolbar *tools=[[UIToolbar alloc]initWithFrame:CGRectMake(0, 0,320,40)];
tools.barStyle=UIBarStyleBlackOpaque;
[myCustomeActionSheet addSubview:tools];
UIBarButtonItem *doneButton=[[UIBarButtonItem alloc]initWithTitle:@"Done" style:UIBarButtonItemStyleBordered target:self action:@selector(btnActinDoneClicked)];
doneButton.imageInsets=UIEdgeInsetsMake(200, 6, 50, 25);
UIBarButtonItem *CancelButton=[[UIBarButtonItem alloc]initWithTitle:@"Cancel" style:UIBarButtonItemStyleBordered target:self action:@selector(btnActinCancelClicked)];
UIBarButtonItem *flexSpace= [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
NSArray *array = [[NSArray alloc]initWithObjects:CancelButton,flexSpace,flexSpace,doneButton,nil];
[tools setItems:array];
//picker title
UILabel *lblPickerTitle=[[UILabel alloc]initWithFrame:CGRectMake(60,8, 200, 25)];
lblPickerTitle.text=@"Select";
lblPickerTitle.backgroundColor=[UIColor clearColor];
lblPickerTitle.textColor=[UIColor whiteColor];
lblPickerTitle.textAlignment=NSTextAlignmentCenter;
lblPickerTitle.font=[UIFont boldSystemFontOfSize:15];
[tools addSubview:lblPickerTitle];
[UIView animateWithDuration:0.5 animations:^{
myCustomeActionSheet.frame=CGRectMake(0,self.view.frame.size.height-myCustomeActionSheet.frame.size.height,myCustomeActionSheet.frame.size.width,myCustomeActionSheet.frame.size.height);
} completion:^(BOOL finished)
{
}];
}
pragma -mark Bar Button Action
-(void)btnActinDoneClicked
{
if (SelectedString==Nil)
{
SelectedString=[pickerArrayList objectAtIndex:0];
}
if (datepickerView)
{
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
NSLocale *posix = [[NSLocale alloc] initWithLocaleIdentifier:@"en_US_POSIX"];
[dateFormatter setLocale:posix];
[dateFormatter setTimeZone:[NSTimeZone systemTimeZone]];
[dateFormatter setDateFormat:@"DD/MM/yy hh:mm a"];
[selectedButton setTitle:[dateFormatter stringFromDate:datepickerView.date] forState:UIControlStateNormal];
}
else
[selectedButton setTitle:SelectedString forState:UIControlStateNormal];
[self performSelector:@selector(btnActinCancelClicked) withObject:nil afterDelay:0.10];
}
-(void)btnActinCancelClicked
{
[UIView animateWithDuration:0.5 animations:^{
viewActiobSheetView.frame=CGRectMake(0,self.view.frame.size.height+1,self.view.frame.size.width,viewActiobSheetView.frame.size.height);
}
completion:^(BOOL finished)
{
[datepickerView removeFromSuperview];
[picker removeFromSuperview];
datepickerView=Nil;
picker=Nil;
}];
}
pragma -mark PickerView Delegate
- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent: (NSInteger)component reusingView:(UIView *)view
{
UILabel *label=[[UILabel alloc] initWithFrame:CGRectMake(0, 0, 320, 40)];
label.text=[pickerArrayList objectAtIndex:row];
label.textAlignment=NSTextAlignmentCenter;
label.textColor=[UIColor blackColor];
return label;
}
-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView;
{
return 1;
}
-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
{
return [pickerArrayList count];
}
-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
SelectedString=[pickerArrayList objectAtIndex:row];
}