UITableView sectionHeader下移22像素?
swift
if#available(iOS15.0, *) {
self.mainTableView.sectionHeaderTopPadding =0 }
OC
if(@available(iOS15.0, *)) {
_downloadTableView.sectionHeaderTopPadding = 0;
}
导航背景颜色修改无效?
swift
if #available(iOS 15.0, *) {
let appearance = UITabBarAppearance()
appearance.configureWithOpaqueBackground()
if darkMode {
appearance.backgroundColor = UIColor.darkBackgroundColour
} else {
appearance.backgroundColor = .white
}
appearance.shadowImage = nil
appearance.shadowColor = nil
appDelegate.tabBarController.tabBar.standardAppearance = appearance
appDelegate.tabBarController.tabBar.scrollEdgeAppearance = appDelegate.tabBarController.tabBar.standardAppearance
}
OC
if (@available(iOS 15.0, *)) {
UINavigationBarAppearance *barApp = [UINavigationBarAppearance new];
barApp.backgroundColor = [[UIColor blueColor] colorWithAlphaComponent:0.5];
self.navigationController.navigationBar.scrollEdgeAppearance = barApp;
self.navigationController.navigationBar.standardAppearance = barApp;
}
UINavigationBar
UINavigationBar 部分属性的设置在 iOS15 上是无效的,iOS15navigationBar 的相关属性设置要通过实例 UINavigationBarAppearance 来实现,UINavigationBarAppearance 是 iOS13 更新的 API,应该有人已经在用,我们的应用兼容 iOS10 以上,对于导航栏的设置还没有使用 UINavigationBarAppearance,如今在 iOS15 上失效,所以对于呈现的问题,做如下适配:
解决方法
主要是以下两个属性 (UINavigationController 的属性)
// 静止样式
self.navigationBar.standardAppearance;
// 滚动样式
self.navigationBar.scrollEdgeAppearance;
swift
if #available(iOS 13.0, *) {
let appearance = UINavigationBarAppearance()
// 设置导航栏背景色
appearance.backgroundColor = .white
// 去除导航栏阴影(如果不设置clear,导航栏底下会有一条阴影线)
appearance.shadowColor = UIColor.clear
// 字体颜色、尺寸等
appearance.titleTextAttributes = [NSAttributedString.Key.foregroundColor: UIColor.white]
// 带scroll滑动的页面
navigationController?.navigationBar.scrollEdgeAppearance = appearance
// 常规页面
navigationController?.navigationBar.standardAppearance = appearance
}
OC
if (@available(iOS 13.0, *)) {
UINavigationBarAppearance * appearance = [[UINavigationBarAppearance alloc] init];
// 背景色
appearance.backgroundColor = [UIColor whiteColor];
// 去除导航栏阴影(如果不设置clear,导航栏底下会有一条阴影线)
appearance.shadowColor = [UIColor clearColor];
// 设置字体颜色、尺寸等
appearance.titleTextAttributes = @{NSForegroundColorAttributeName: [UIColor redColor]};
// 带scroll滑动的页面
self.navigationController.navigationBar.scrollEdgeAppearance = appearance;
// 常规页面
self.navigationController.navigationBar.standardAppearance = appearance;
}
导航栏隐藏的返回按钮失效问题
swift
//appdelegate全局设置
[[UIBarButtonItem appearance] setBackButtonTitlePositionAdjustment:UIOffsetMake(-200, 0) forBarMetrics:UIBarMetricsDefault];
// iOS 15适配
if (@available(iOS 13.0, *)) {
UINavigationBarAppearance *appearance = [[UINavigationBarAppearance alloc] init];
[appearance setBackgroundColor:[UIColor whiteColor]];
// UINavigationBarAppearance 会覆盖原有的导航栏设置,这里需要重新设置返回按钮隐藏,不隐藏可注释或删掉
appearance.backButtonAppearance.normal.titlePositionAdjustment = UIOffsetMake(-200, 0);
[[UINavigationBar appearance] setScrollEdgeAppearance: appearance];
[[UINavigationBar appearance] setStandardAppearance:appearance];
}
UITabbar
tabbar 背景颜色设置失效
if #available(iOS 13.0, *) {
let appearance = UITabBarAppearance()
// 背景色
appearance.backgroundColor = .white
tabBar.standardAppearance = appearance
if #available(iOS 15.0, *) {
tabBar.scrollEdgeAppearance = appearance
}
}
OC
if (@available(iOS 13.0, *)) {
UITabBarAppearance * appearance = [[UITabBarAppearance alloc] init];
// 背景色
appearance.backgroundColor = [UIColor whiteColor];
self.tabBar.standardAppearance = appearance;
if (@available(iOS 15.0, *)) {
self.tabBar.scrollEdgeAppearance = appearance;
}
}
iOS 15 的 UITableView 新增了一条新属性:sectionHeaderTopPadding, 默认会给每一个 section header 增加一个高度,当我们使用 UITableViewStylePlain 初始化 UITableView 的时候,能发现 sectionHeader 增高了 22px。
/// Padding above each section header. The default value is `UITableViewAutomaticDimension`.
@available(iOS 15.0, *)
open var sectionHeaderTopPadding: CGFloat
//iOS 15中tableView会给每一个section的顶部(header以上)再加上一个22像素的高度,形成一个section和section之间的间距
if #available(iOS 15.0, *) {
tableView.sectionHeaderTopPadding = 0
}
//或者appdelegate全局设置
if #available(iOS 15.0, *) {
UITableView.appearance().sectionHeaderTopPadding = 0
}
OC
if (@available(iOS 15.0, *)) {
tableView.sectionHeaderTopPadding = 0;
}
//或者appdelegate全局设置
if (@available(iOS 15.0, *)) {
[UITableView appearance].sectionHeaderTopPadding = 0;
}
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