[英]uidatepicker problem
I develop ipad application, I have a button, I want when click button a subview appear containing datepicker, done cancel我开发 ipad 应用程序,我有一个按钮,我想在单击按钮时出现一个包含 datepicker 的子视图,完成取消
the problem is that问题是
I use the following code我使用以下代码
-(IBAction)BirthDatePicker:(id)sender{
if(! ISPicker) {
if( self.interfaceOrientation == UIInterfaceOrientationPortrait || self.interfaceOrientation == UIInterfaceOrientationPortraitUpsideDown)
{
pickerView = [[UIPickerView alloc]initWithFrame:CGRectMake(0,700, 768, 216)];
mytab = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 656, 768, 44)];
}
else {
pickerView = [[UIPickerView alloc]initWithFrame:CGRectMake(0,439, 1024, 216)];
mytab = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 395, 1024, 44)];
}
pickerView.alpha=0.0;
mytab.alpha=0.0;
//pickerView.showsSelectionIndicator = YES;
[self.view addSubview:pickerView];
[self.view bringSubviewToFront:pickerView];
mytab.tintColor=[UIColor blackColor];
UIBarButtonItem * bt1=[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(_Done)];
UIBarButtonItem * bt2=[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCancel target:self action:@selector(_cancel)];
UIBarButtonItem * flx=[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:self action:nil];
NSArray *arr=[[NSArray alloc] initWithObjects:flx,bt1,bt2,nil];
[mytab setItems:arr];
[self.view addSubview:mytab];
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:0.3];
pickerView.alpha=1.0;
mytab.alpha=1.0;
[UIView commitAnimations];
[pickerView release];
[mytab release];
[bt1 release];
[flx release];
[arr release];
ISPicker = true ;
}
}
-(void)_Done{
ISPicker = false ;
NSDate * selected = [pickerView date];
NSString * date = [selected description];
DateLabel.text = date;
}
-(void)_Cancel{
ISPicker = false ;
//// Release the view
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:0.3];
pickerView.alpha=0.0;
mytab.alpha=0.0;
[UIView commitAnimations];
}
any suggestion please请有任何建议
You should not releasse your pickerView
and myTab
until you are done with it, remove the release from - (IBAction)BirthDatePicker:(id)sender
and move to the -(void)_Done
and -(void)_Cancel
在完成之前,您不应释放您的
pickerView
和myTab
,从 - (IBAction)BirthDatePicker:(id)sender
中删除释放并移至-(void)_Done
和-(void)_Cancel
the wrong is in this line错误在这一行
pickerView = [[UIPickerView alloc]initWithFrame:CGRectMake(0,700, 768, 216)];
it should be它应该是
pickerView = [[UIDatePicker alloc]initWithFrame:CGRectMake(0,700, 768, 216)];
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