我使用xcode7在iOS9.0的导航栏上实现了两个右键栏项目,我想隐藏/显示一个指定条件的右键栏。我正在使用以下代码。请帮助我
UIBarButtonItem *selectButton= [[UIBarButtonItem alloc]initWithTitle:@"Select" style:UIBarButtonItemStylePlain target:self action:@selector(clickOnSelect:)];
UIBarButtonItem *shareButton = [[UIBarButtonItem alloc]initWithTitle:@"Share" style:UIBarButtonItemStylePlain target:self action:@selector(clickOnShare:)];
self.navigationItem.rightBarButtonItems = @[selectButton,shareButton];
-(void)clickOnSelect:(id)sender{
NSLog(@"self.navigationItem.rightBarButtonItems :%@",self.navigationItem.rightBarButtonItems);
UIBarButtonItem *shareButton = (UIBarButtonItem *) [self.navigationItem.rightBarButtonItems objectAtIndex:1];
shareButton.customView.hidden = YES; // its not working
}
答案 0 :(得分:1)
试试这个:
-(void) changeBarButtonVisibility:(UIBarButtonItem*) barButtonItem visibility:(BOOL) shouldShow {
UIColor *tintColor = shouldShow == NO ? [UIColor clearColor] : nil;
[barButtonItem setEnabled:shouldShow];
[barButtonItem setTintColor:tintColor];
}
并调用上述方法并传递要隐藏的栏按钮
[self changeBarButtonVisibility:self.navigationItem.rightBarButtonItems[0] visibility:NO];
[self changeBarButtonVisibility:self.navigationItem.rightBarButtonItems[1] visibility:YES];
答案 1 :(得分:0)
没有" .hidden
"属性为原生UIBarButtonItem。
列出了许多可能的答案in this very related question,我认为最好的答案可能是尝试子类化UIBarButtonItem(HidableBarButtonItem子类),如果项目是假设的话,只用空字符串替换标题被隐藏。
答案 2 :(得分:0)
试试这个
-(UIBarButtonItem *)getLeftBarbuttonItem{
UIButton *menuButton = [UIButton buttonWithType:UIButtonTypeCustom];
menuButton.frame = CGRectMake(0, 0, 24, 24);
[menuButton setImage:[UIImage imageNamed:@"menu-icon.png"] forState:UIControlStateNormal];
[menuButton addTarget:self.revealController action:@selector(revealToggle:) forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *leftbarButton = [[UIBarButtonItem alloc] initWithCustomView:menuButton];
return leftbarButton;
}
-(void)showNavBarItem:(BOOL)isShow{
if(isShow){
[self.navigationItem setLeftBarButtonItem:[self getLeftBarbuttonItem] animated:true];
}else{
[self.navigationItem setLeftBarButtonItem:nil animated:true];
}
}
右BarButton隐藏
-(UIBarButtonItem *)getFirstBarbuttonItem:(BOOL)isHide{
UIButton *menuButton = [UIButton buttonWithType:UIButtonTypeCustom];
menuButton.frame = CGRectMake(0, 0, 24, 24);
[menuButton setImage:[UIImage imageNamed:@"menu-icon.png"] forState:UIControlStateNormal];
[menuButton addTarget:self.revealController action:@selector(revealToggle:) forControlEvents:UIControlEventTouchUpInside];
menuButton.hidden = isHide;
UIBarButtonItem *leftbarButton = [[UIBarButtonItem alloc] initWithCustomView:menuButton];
return leftbarButton;
}
-(UIBarButtonItem *)getSecondBarbuttonItem:(BOOL)isHide{
UIButton *menuButton = [UIButton buttonWithType:UIButtonTypeCustom];
menuButton.frame = CGRectMake(0, 0, 24, 24);
[menuButton setImage:[UIImage imageNamed:@"menu-icon.png"] forState:UIControlStateNormal];
[menuButton addTarget:self.revealController action:@selector(revealToggle:) forControlEvents:UIControlEventTouchUpInside];
menuButton.hidden = isHide;
UIBarButtonItem *leftbarButton = [[UIBarButtonItem alloc] initWithCustomView:menuButton];
return leftbarButton;
}
self.navigationItem.rightBarButtonItems = @[[self getFirstBarbuttonItem:YES],[self getSecondBarbuttonItem:NO]];
答案 3 :(得分:0)
快速5.1
<form method="post" id="IdA" action="https://example.com/action.php"><input id='valid' name='valid' value='012.23945765955' type="hidden"><button class="g-recaptcha" data-sitekey="XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX" data-callback="onSubmit" id="IdA" style="background:url(https://www.example.com/button.gif);width:190px;height:58px;border:none;cursor:pointer;display:none;" type="submit"></button></form>