编辑模式下的UITableView - "编辑"按钮不会改变状态

Question

我有一个带有tableView的UIViewController类.在viewDidLoad中:

UIBarButtonItem *editIcon = [[[UIBarButtonItem alloc]
initWithBarButtonSystemItem: UIBarButtonSystemItemEdit
                    target:self
                    action:@selector(toggleEditMode)] autorelease];

在te方法'toggleEditMode'中:

-(void)toggleEditMode{
if(self.theTable.editing) {
    [theTable setEditing:NO animated:YES];
    [self.navigationItem.rightBarButtonItem setStyle:UIBarButtonItemStylePlain];
}
else if ([callsArray count]!=0){
    [theTable setEditing:YES animated:YES];
    [self.navigationItem.rightBarButtonItem setStyle:UIBarButtonItemStyleDone];
}

}

问题是编辑按钮不会改变'完成'.少了什么东西？我声明了所有方法:

- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
- (UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath

谢谢,

RL

Answer 1

为什么不-editButtonItem直接使用UIViewController？并覆盖-setEditing:animated:方法.

// Assign the system's edit button, 
// it will change style when different edit status.
self.navigationItem.rightBarButtonItem = self.editButtonItem;

// The editButtonItem will invoke this method.
- (void)setEditing:(BOOL)editing animated:(BOOL)animated {
    [super setEditing:editing animated:animated];

    if (editing) {
         // Execute tasks for editing status
    } else {
         // Execute tasks for non-editing status.
    }
}