UITableView的顶部和底部有不同的背景颜色

Light gray background in “bounce area”...

我在哪里发现了这个代码狙击手(稍作修改),它工作得很好:

CGRect frame = self.tableView.bounds;
frame.origin.y = -frame.size.height;
UIView* grayView = [[UIView alloc] initWithFrame:frame];
grayView.backgroundColor = [UIColor grayColor];
[self.tableView addSubview:grayView];
[grayView release];

var frame = self.tableView.bounds
frame.origin.y = -frame.size.height
let grayView = UIView(frame: frame)
grayView.backgroundColor = .gray
self.tableView.addSubview(grayView)

Swift 5.0+

带扩展的解决方案:

extension UITableView {

    func addTopBounceAreaView(color: UIColor = .white) {
        var frame = UIScreen.main.bounds
        frame.origin.y = -frame.size.height

        let view = UIView(frame: frame)
        view.backgroundColor = color

        self.addSubview(view)
    }
}

tableView.addTopBounceAreaView()

2. 将搜索栏视图放入容器视图中。将表视图的标题视图设置为此容器视图(而不是搜索栏视图本身,这可能是您之前所做的)。

将tableFooterView设置为高度和宽度均为0的视图,该视图在其边界之外绘制。一个简单的方法是向其中添加一个大子视图:

self.tableView.tableFooterView = [[[UIView alloc] initWithFrame:CGRectZero] autorelease];
UIView *bigFooterView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 1000)];
bigFooterView.backgroundColor = [UIColor whiteColor];
bigFooterView.opaque = YES;
[self.tableView.tableFooterView addSubview:bigFooterView];
[bigFooterView release];

相应地调整[UIColor whiteColor]和bigFooterView的宽度(如果你的tableView可以水平移动,你会希望它比320宽)。这样,在顶部,您将看到您的表视图背景是什么,在底部,您可以看到您将此视图的背景设置为什么。

- (void) scrollViewDidScroll: (UIScrollView *) sv
{
    float percent =  sv.contentOffset.y / sv.contentSize.height;
    percent = 0.5 + (MAX(MIN(1.0f, percent), 0.0f) / 2.0f);

    sv.backgroundColor = [UIColor colorWithRed:percent * 0.20392
                                         green:percent * 0.19607
                                          blue:percent * 0.61176 alpha: 1.0f];
}

- (void)scrollViewDidScroll:(UIScrollView *)sv
{
        UIColor *backgroundColor = nil;

        float percent = sv.contentOffset.y / sv.contentSize.height;
        percent = 0.5 + (MAX(MIN(1.0f, percent), 0.0f) / 2.0f);

        if (0.5f == percent)
        {
            backgroundColor = RGBCOLOR(233.0f, 235.0f, 237.0f);
        }
        else
        {
            CGFloat r = 233.0f * (1.0f - percent) + 255.0f * percent;
            CGFloat g = 235.0f * (1.0f - percent) + 255.0f * percent;
            CGFloat b = 237.0f * (1.0f - percent) + 255.0f * percent;
            backgroundColor = RGBCOLOR(r,g,b);
        }           
        sv.backgroundColor = backgroundColor;
}

var frame = self.tableView.bounds
frame.origin.y = -frame.size.height
let view = UIView(frame: frame)
view.backgroundColor = .gray
self.tableView.addSubview(view)

这可能不是“最佳实践”,但如果你真的想像苹果那样做,有一个私人 UITableView 物业名称 tableHeaderBackgroundColor 灰色是 #e2e7ed .

你可以把这样的东西放在 -viewDidLoad a方法 UITableViewController :

UIColor *grayishColor = [UIColor colorWithRed:226/255.0
                                        green:231/255.0
                                         blue:237/255.0 alpha:1.0];
[self.tableView setValue:grayishColor forKey:@"tableHeaderBackgroundColor"];

   self.tableView.tableFooterView = UIView();

   if let tableFooterView = self.tableView.tableFooterView {
         let bigFooterView = UIView();
         bigFooterView.backgroundColor = UIColor.white;
         bigFooterView.isOpaque = true;
         tableFooterView.addSubview(bigFooterView);

         bigFooterView.translatesAutoresizingMaskIntoConstraints = false;

         tableFooterView.addConstraint(NSLayoutConstraint(item: bigFooterView, attribute: .trailing, relatedBy: .equal, toItem: tableFooterView, attribute: .trailing, multiplier: 1, constant: 0));
         tableFooterView.addConstraint(NSLayoutConstraint(item: bigFooterView, attribute: .leading, relatedBy: .equal, toItem: tableFooterView, attribute: .leading, multiplier: 1, constant: 0));
         tableFooterView.addConstraint(NSLayoutConstraint(item: bigFooterView, attribute: .top, relatedBy: .equal, toItem: tableFooterView, attribute: .top, multiplier: 1, constant: 0));
         tableFooterView.addConstraint(NSLayoutConstraint(item: bigFooterView, attribute: .height, relatedBy: .equal, toItem: nil, attribute: .notAnAttribute, multiplier: 1, constant: 1000));
   }

Light gray background in “bounce area” of a UITableView 底部也是如此。希望这能有所帮助:)

CGRect topFrame = self.tableView.bounds;
topFrame.origin.y = -topFrame.size.height;
UIView* topView = [[UIView alloc] initWithFrame:topFrame];
topView.backgroundColor = [UIColor grayColor]; // change to any color you want
[self.tableView addSubview:topView];

CGRect bottomFrame = self.tableView.bounds;
bottomFrame.origin.y = self.tableView.contentSize.height;
UIView* bottomView = [[UIView alloc] initWithFrame:bottomFrame];
bottomView.backgroundColor = [UIColor grayColor]; // change to any color you want
[self.tableView addSubview:bottomView];

这是我的解决方案:

    let topColor = UIColor.blue
    let bottomColor = UIColor.black

    self.tableView.backgroundColor = topColor
    self.tableView.tableFooterView = UIView(frame: CGRect.zero)
    let footerView = UIView(frame: CGRect(x: 0, y: 0, width: view.frame.width, height: 1000))
    footerView.backgroundColor = bottomColor
    self.tableView.tableFooterView?.addSubview(footerView)

SwiftUI解决方案

 var body: some View {
        
        NavigationView {
            
            List(data, id: \.self) { data in
                Text("\(data)")
            }
            .onAppear {
                let headerView = UIView(frame: CGRect(x: 0, y: -400, width: UIScreen.main.bounds.width, height: 400.0))
                headerView.backgroundColor = .lightGray
                UITableView.appearance().addSubview(headerView)
            }
            .navigationBarTitle("Title", displayMode: .inline)
        }
    }

UIView

let backgroundView = UIView()
backgroundView.backgroundColor = .black
UITableView.appearance().backgroundView = backgroundView

tableHeaderView 和 tableFooterView 的性质 UITableView .