UIPopoverController 使用 UINavigationBar中添加左箭頭返回按鈕

-(void) onSetting:(id) sender {

 

    SplitBaseController *detail = [[SettingServerController alloc] init];

 

    CGRect frame = [(UIView *)sender frame];

    frame.origin.y = 0;

 

    UIPopoverController *popwin = [[UIPopoverController alloc] initWithContentViewController:detail];

    [popwin setPopoverContentSize:CGSizeMake(400, 300) animated:YES];

    popwin.delegate = self;

    [popwin presentPopoverFromRect: frame inView:self.view permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];

 

    [detail release];
在UINavigationBar中添加左箭頭返回按鈕
在iPhone裏面最討厭的控件之一就是 UINavigationBar了。這個控件樣式修改不方便，連添加按鈕也特別麻煩。下面的例子是如何手動添加帶箭頭的按鈕：

UINavigationItem *item = [navBar.items objectAtIndex:0];

UINavigationItem *back = [[UINavigationItem alloc] initWithTitle:@"Back"];

NSArray *items = [[NSArray alloc] initWithObjects:back,item,nil];

[navBar setItems:items];

 

- (BOOL)navigationBar:(UINavigationBar *)navigationBar

shouldPopItem:(UINavigationItem *)item{

//在此處添加點擊back按鈕之後的操作代碼

return NO;

}

(void) onSetting:(id) sender {

 

    SplitBaseController *detail = [[SettingServerController alloc] init];

 

    CGRect frame = [(UIView *)sender frame];

    frame.origin.y = 0;

 

    UIPopoverController *popwin = [[UIPopoverController alloc] initWithContentViewController:detail];

    [popwin setPopoverContentSize:CGSizeMake(400, 300) animated:YES];

    popwin.delegate = self;

    [popwin presentPopoverFromRect: frame inView:self.view permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];

 

    [detail release];