ios - 无法在 tableView 页脚中将 imageView 居中

Question

我正在尝试将标签和图像置于 tableView 页脚的中心

我似乎无法使其同时适用于 iPhone 和 iPad 设备

现在它以 iPhone 为中心，但那是因为我对它进行了硬编码。

-(UIView *)tableView:(UITableView *)tableView viewForFooterInSection:(NSInteger)section{

    UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.view.bounds.size.width, 50)];
    [view setBackgroundColor:[UIColor clearColor]];
    UILabel *lbl = [[UILabel alloc] initWithFrame:CGRectMake(0, 15, self.view.bounds.size.width, 20)];
    lbl.lineBreakMode = NSLineBreakByWordWrapping;
    lbl.numberOfLines = 0;
    [lbl setText:@"Powered By"];
    [lbl setFont:[UIFont systemFontOfSize:10]];
    [lbl setTextAlignment:NSTextAlignmentCenter];
    [lbl setTextColor:[UIColor blackColor]];

    District *school = [District new];

    UIImageView  * logoView = [[UIImageView alloc]initWithFrame:CGRectMake(50, 25, 150, 37.5)];
    logoView.image = [UIImage imageNamed:@"Logo.png"];

    [logoView autoresizingMask];
    [view addSubview:logoView];

    [view addSubview:lbl];

    return view;
}

我想居中这个 View ，而不对其进行硬编码。我尝试将屏幕尺寸除以 2。

没有居中，正确的做法是什么，请指教。

Answer 1

您需要根据需要设置 View 的autoresizingMask。

- (UIView *)tableView:(UITableView *)tableView viewForFooterInSection:(NSInteger)section {
    UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.view.bounds.size.width, 50)];
    [view setBackgroundColor:[UIColor clearColor]];

    CGRect lblFrame = view.bounds;
    lblFrame.origin.y = 15;
    lblFrame.size.height = 20;
    UILabel *lbl = [[UILabel alloc] initWithFrame:lblFrame];
    lbl.autoresizingMask = UIViewAutoresizingFlexibleWidth;
    lbl.lineBreakMode = NSLineBreakByWordWrapping;
    lbl.numberOfLines = 0;
    [lbl setText:@"Powered By"];
    [lbl setFont:[UIFont systemFontOfSize:10]];
    [lbl setTextAlignment:NSTextAlignmentCenter];
    [lbl setTextColor:[UIColor blackColor]];

    District *school = [District new];

    CGRect logoFrame = CGRectMake((view.bounds.size.width - 150) / 2.0, 25, 150, 37.5);
    UIImageView  * logoView = [[UIImageView alloc]initWithFrame:logoFrame];
    logoView.image = [UIImage imageNamed:@"Logo.png"];

    logoView.autoresizingMask = UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin;
    [view addSubview:logoView];

    [view addSubview:lbl];

    return view;
}

这假定标签应填满宽度并且图像应从左到右居中。