[英]How to remove subviews from UITabbarcontroller view using objective-c
我在使用For
Loop的方法中将UILabel对象添加到选项卡栏控制器视图,但是在另一种方法中,我需要从tabbarcontroller视图中删除所有UILabel子视图。
这是我添加的代码:
-(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;
}
}
这是我要删除的代码:
-(void)tabBarImage_methodRemoving:(NSNotification *)note
{
for (UILabel *lab in self.tabBarController.view)
{
[lab removeFromSuperview];
}
}
尝试这样的事情:
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)];
将UILabel添加到tabbarcontroller视图时,请使用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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