I added UILabel object to the tab bar controller view in a method using For
Loop, but in another method I need to remove all UILabel sub views from tabbarcontroller view.
Here is my code for adding:
-(void)tabBarImage_methodAdding:(NSNotification *)note
{
CGRect screenRect = [[UIScreen mainScreen] bounds];
for (int i=0; i<4; i++)
{
UILabel *objLabel=[[UILabel alloc]initWithFrame:CGRectMake(18+80*i,
screenRect.size.height-18, 70, 15)];
objLabel.backgroundColor=[UIColor clearColor];
objLabel.text=[tabBarNamesArray objectAtIndex:i];
objLabel.font=[UIFont systemFontOfSize:11.0];
objLabel.textColor=[UIColor whiteColor];
[self.tabBarController.view addSubview:objLabel];
[objLabel release];objLabel=nil;
}
}
Here is my code for removing:
-(void)tabBarImage_methodRemoving:(NSNotification *)note
{
for (UILabel *lab in self.tabBarController.view)
{
[lab removeFromSuperview];
}
}
Try something like this:
for (id subview in self.tabBarController.view.subviews) {
if ([subview isMemberOfClass:[UILabel class]]) {
[subview removeFromSuperview];
}
}
if(self.tabBarController!=nil){
while ([self.tabBarController.subviews count] > 0) {
NSLog(@"subviews Count=%d",[[self.tabBarController subviews]count]);
[[[self.tabBarController subviews] objectAtIndex:0] removeFromSuperview];
}
}
-(void)tabBarImage_methodRemoving:(NSNotification *)note
{
for (id obj in self.tabBarController.view.subviews)
{
if([obj isKindOfClass:[UILabel class]]){
[obj removeFromSuperview];
}
}
}
在您的For
循环中尝试以下操作:-
[self.tabBarController.subviews makeObjectsPerformSelector:@selector(removeFromSuperview)];
When you are adding UILabels to the tabbarcontroller view take help of tag.ie
- (void)tabBarImage_methodAdding:(NSNotification *)note
{
CGRect screenRect = [[UIScreen mainScreen] bounds];
for (int i=0; i<4; i++)
{
UILabel *objLabel=[[UILabel alloc]initWithFrame:CGRectMake(18+80*i,
screenRect.size.height-18, 70, 15)];
objLabel.backgroundColor=[UIColor clearColor];
objLabel.text=[tabBarNamesArray objectAtIndex:i];
[objLabel setTag:1000+i];
objLabel.font=[UIFont systemFontOfSize:11.0];
objLabel.textColor=[UIColor whiteColor];
[self.tabBarController.view addSubview:objLabel];
[objLabel release];objLabel=nil;
}
- (void)tabBarImage_methodRemoving:(NSNotification *)note
{
for (UIView *lab in self.tabBarController.view.subviews)
{
if(lab.tag>=1000 && lab.tag<1004)
[lab removeFromSuperview];
}
}
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