I want to add a view from a nib file as a subview of my main view at the click of a button, but it has to be in a frame (0,108,320,351). I've tried the fo开发者_Python百科llowing code:
-(IBAction) displayJoinmeetup:(id)sender
{
[meetups removeFromSuperview]; //removing the older view
CGRect myFrame = CGRectMake(0, 108,320,351);
[joinmeetup initWithFrame:myFrame]; //joinmeetup declared in header file as IBoutlet UIView*joinmeetup
[self.view addSubview:joinmeetup];
}
This displays only a blank screen, otherwise if I remove the frame the subview displays covering the whole screen, how can I properly do this?
You should never call init... on an object after it has been created. If you can change a setting, there will be a setter for it. In this case, it is setFrame:
-(IBAction) displayJoinmeetup:(id)sender {
[meetups removeFromSuperview]; //removing the older view
CGRect myFrame = CGRectMake(0, 108,320,351);
[joinmeetup setFrame:myFrame]; //joinmeetup declared in header file as IBoutlet UIView*joinmeetup
[self.view addSubview:joinmeetup];
}
initWithFrame is not called for a view loaded from nib. See the UIView class ref for details. You need to set the view size properties in interface builder (inspector).
You can try thi as follow:
-(IBAction) displayJoinmeetup:(id)sender
{
if(meetups)
{
[meetups removeFromSuperview]; //removing the older view
//also here you should release the meetups, if it is allocated
meetups = nil;
}
UIView *tempView = [[UIView alloc] initWithFrame:CGRectMake(0, 108,320,351)];
joinmeetup = tempView;
[tempView release];
[self.view addSubview:joinmeetup];
}
I suggest you try this:
[joinmeetup setFrame:CGRectMake(0, 108,320,351)];
[self.view addSubview:joinmeetup];
精彩评论