[英]How to remove view from superview in run time?
Based on internet connectivity I have to remove or add subview to superview.基于互联网连接,我必须删除或添加子视图到超级视图。
I can able to add subview in runtime.我可以在运行时添加子视图。 But not remove from subview.
但不能从子视图中删除。
I tried like this我试过这样
if ([statusString isEqualToString:@"Access Not Available"]){
view = [[UIView alloc]initWithFrame:CGRectMake(0, navigationView.frame.size.height, self.view.frame.size.width, 50)];
[self.view addSubview:view];
view.backgroundColor = [UIColor lightGrayColor];
}else{
[[NSOperationQueue mainQueue] addOperationWithBlock:^ {
[view removeFromSuperview];
}];
}
But it is not removing from superview.但它并没有从超级视图中删除。
How can I do this?我怎样才能做到这一点?
///in view did load
view_NoConnectn = [[UIView alloc]init];
[view_NoConnectn setBackgroundColor:[UIColor whiteColor]];
[view_NoConnectn setFrame:CGRectMake(0, frameHeight, frameWidth, 35)];
UIWindow* mainWindow = [[UIApplication sharedApplication] keyWindow];
bool isFound=false;
for(UIView *child in [mainWindow subviews])
{
if([child tag]==007)
isFound=true;
}
if(!isFound)
{
[mainWindow addSubview: btn_setting];
}
[self.navigationController.view addSubview:view_NoConnectn];
////// whereever required
if (show){
if (self.navigationController.view.frame.size.height == frameHeight) {
[UIView animateWithDuration:1.0 animations:^{
[self.navigationController.view setFrame:CGRectMake(self.navigationController.view.frame.origin.x, self.navigationController.view.frame.origin.y, self.navigationController.view.frame.size.width, frameHeight - 35)];
[view_NoConnectn setFrame:CGRectMake(0, frameHeight-35, frameWidth, 35)];
[self.view layoutIfNeeded];
}];
}
}
else
{
if (self.navigationController.view.frame.size.height != frameHeight) {
[UIView animateWithDuration:1.0 animations:^{
[UIView animateWithDuration:0.8 animations:^{
[self.navigationController.view setFrame:CGRectMake(self.navigationController.view.frame.origin.x, self.navigationController.view.frame.origin.y, self.navigationController.view.frame.size.width, frameHeight)];
[view_NoConnectn setFrame:CGRectMake(0, frameHeight, frameWidth, 35)];
[self.view layoutIfNeeded];
}];
} completion:^(BOOL finished) {
[view_NoConnectn removeFromSuperview];
}];
}
}
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