我使用drawRect创建了一个自定义按钮:并将其放在我的tableview的headerview中。我希望在选择编辑模式时隐藏自定义按钮。我知道我可以通过使用方法来做到这一点:
-(void)setEditing:(BOOL)editing animated:(BOOL)animated
但出于某种原因,当我1)将其设置为nil,2)或使用button.hidden属性时,我的按钮实际上并没有消失。这是我的代码:
TableViewController.h:
@interface ToDoTableViewController : UITableViewController <Properties2ViewControllerDelegate, UITableViewDelegate>{
addButtonView *button;
}
@property (strong, nonatomic) NSMutableArray *taskArray;
@property (strong, nonatomic) NSMutableArray *completedArray;
-(IBAction)addCell:(id)sender;
-(void)buttonPressed:(id)sender;
@end
TableViewController.m
-(UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section{
UIView *headerView;
UIView *seperatorView;
CGRect testFrame = CGRectMake(280.0, 5.0, 30.0, 30.0);
button = [[addButtonView alloc]initWithFrame:testFrame];
NSString *sectionTitle = @"Incomplete Tasks";
NSString *section2Title = @"Completed Tasks";
UILabel *label = [[UILabel alloc]init];
label.textColor = [UIColor colorWithRed:236.0/255 green:240.0/255 blue:241.0/255 alpha:1.0f];
label.font = [UIFont fontWithName:@"HelveticaNeue-Light" size:25];
label.backgroundColor = [UIColor clearColor];
label.frame = CGRectMake(10.0, 0.0, 320.0, 40.0);
headerView = [[UIView alloc]initWithFrame:label.frame];
[button addTarget:self action:@selector(addCell:) forControlEvents:UIControlEventTouchUpInside];
[button addTarget:self action:@selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside];
CGRect sepFrame = CGRectMake(0, headerView.frame.size.height-2, 320, 1);
seperatorView = [[UIView alloc] initWithFrame:sepFrame];
seperatorView.backgroundColor = [UIColor colorWithRed:236.0/255 green:240.0/255 blue:241.0/255 alpha:1.0f];
[headerView addSubview:seperatorView];
switch (section) {
case 0:
label.text = sectionTitle;
[headerView addSubview:label];
[headerView addSubview:button];
break;
case 1:
label.text = section2Title;
[headerView addSubview:label];
// if (completedArray == nil)
// headerView.hidden = YES;
break;
}
return headerView;
}
-(void)setEditing:(BOOL)editing animated:(BOOL)animated{
[super setEditing:editing animated:animated];
if([self isEditing]){
button.hidden = YES;
}else {
button.hidden = NO;
}
}
--- ---- EDIT
-(void)setEditing:(BOOL)editing animated:(BOOL)animated{
[super setEditing:editing animated:animated];
if([self isEditing]){
button.hidden = YES;
[[self tableView] reloadData]; //shouldn't this make the button dissapear?
}else {
button.hidden = NO;
}
}
答案 0 :(得分:0)
每当重新加载表视图时,您的代码将重新创建整个标题,包括创建一个新按钮。因此,您可能已将旧按钮设置为隐藏,然后将其销毁并替换为新的可见按钮。
返回标头时,要么创建一次并始终返回相同的实例,那么更改hidden
属性应该有效。或者,每次创建标题时检查表isEditing
,并确定结果如何。
让我们使用更有效的标头重用选项:
viewDidLoad
中创建标题视图(使用当前代码,但转移到其他方法)。viewForHeaderInSection
只返回数组中的标题(基于section
)setEditing:
中遍历数组并隐藏/显示每个按钮(您可以将按钮存储在另一个数组中,以便轻松实现)