demo：
oc代码：https://github.com/xinsun001/iOS-15UI-oc.git
swift代码：https://github.com/xinsun001/iOS-15UI-swift.git
1、导航栏UINavigationBar
iShot2021-12-15 11.31.04.gif
从 iOS 15 开始，UINavigationBar、UIToolbar 和 UITabBar 在控制器中关联滚动视图顶部或底部时使用
在iOS15中，UINavigationBar默认是透明的，有滑动时会逐渐变为模糊效果，可以通过改变UINavigationBar.scrollEdgeAppearance属性直接变为模糊效果、配置相关属性-背景、字体等
调整如下：
//强烈建议直接隐藏系统导航栏，使用自定义的导航栏！！
object-c:
if (@available(iOS 15.0, *)) {
UINavigationBarAppearance *navBarApperance = [UINavigationBarAppearance new];
// 颜色
navBarApperance.backgroundColor = [UIColor redColor];
//图片
// navBarApperance.backgroundImage = [UIImage imageNamed:@"bgImage.png"];
// navBarApperance.backgroundImageContentMode = UIViewContentModeScaleToFill;
NSDictionary *dictM = @{ NSForegroundColorAttributeName:[UIColor blackColor]};
navBarApperance.titleTextAttributes = dictM;
self.navigationController.navigationBar.standardAppearance = navBarApperance;
self.navigationController.navigationBar.scrollEdgeAppearance = navBarApperance;
}else{
self.navigationController.navigationBar.barTintColor = [UIColor redColor];
// [self.navigationController.navigationBar setBackgroundImage:[UIImage imageNamed:@"bgImage.png"] forBarMetrics:UIBarMetricsDefault];
}
swift:
if #available(iOS 15.0,*) {
let navBarAppecrace = UINavigationBarAppearance()
//颜色
// navBarAppecrace.backgroundColor = UIColor.red
//图片
navBarAppecrace.backgroundImage = UIImage.init(named: "bgImage.png")
navBarAppecrace.backgroundImageContentMode = .scaleToFill
navBarAppecrace.titleTextAttributes = [NSAttributedString.Key.foregroundColor: UIColor.black]
self.navigationController?.navigationBar.standardAppearance = navBarAppecrace
self.navigationController?.navigationBar.scrollEdgeAppearance = navBarAppecrace
} else {
self.navigationController?.navigationBar.barTintColor = UIColor.red
// self.navigationController?.navigationBar.setBackgroundImage(UIImage.init(named: "bgImage.png"), for: .any, barMetrics: .default)
}
效果对比：
iShot2021-12-15 11.57.58.gif
image.png
2、Tableview
iShot2021-12-15 12.07.14.gif
因为iOS 15新增sectionHeaderTopPadding属性，在tableview的UITableViewStylePlain类型中，header上方又增加了高度（22像素）
调整如下：
object-c:
-(UITableView *)tableview{
if (!_tableview) {
_tableview=[[UITableView alloc] initWithFrame:CGRectZero style:UITableViewStylePlain];
_tableview.backgroundColor = [UIColor whiteColor];
_tableview.delegate = self;
_tableview.dataSource = self;
if (@available(iOS 15.0, *)) {
_tableview.sectionHeaderTopPadding = 0; //去掉headerpadding的高度
}
}
return _tableview;
}
swift:
private lazy var tableview:UITableView = {
let tab = UITableView.init(frame: .zero, style: .plain)
tab.backgroundColor = UIColor.white
tab.delegate = self
tab.dataSource = self
if #available(iOS 15.0, *) {
tab.sectionHeaderTopPadding = 0
}
return tab
}()
效果对比：
iShot2021-12-15 12.12.26.gif
3：TabBar
这里我看到好多文章说和navigationbar是一个毛病，背景色和图片设置在iOS 15上面都不会生效，但是我经过测试，oc是没有毛病的！swift语言确实会不生效。为了统一做了如下改动
代码和效果图如下：
object-c:
if (@available(iOS 15.0, *)) {
UITabBarAppearance *tabBarAppearanc = [UITabBarAppearance new];
//颜色
tabBarAppearanc.backgroundColor = [UIColor greenColor];
// //图片
// tabBarAppearanc.backgroundImage = [UIImage imageNamed:@"bgImage.png"];
// tabBarAppearanc.backgroundImageContentMode = UIViewContentModeScaleToFill;
NSDictionary *dictM = @{ NSForegroundColorAttributeName:[UIColor redColor]};
tabBarAppearanc.stackedLayoutAppearance.selected.titleTextAttributes = dictM;
// tabBarAppearanc.stackedLayoutAppearance.normal.titleTextAttributes = .....
self.tabBar.scrollEdgeAppearance = tabBarAppearanc;
self.tabBar.standardAppearance = tabBarAppearanc;
} else {
// Fallback on earlier versions
[[UITabBarItem appearance] setTitleTextAttributes:@{ NSForegroundColorAttributeName:[UIColor blackColor]} forState:UIControlStateNormal];
[[UITabBarItem appearance] setTitleTextAttributes:@{ NSForegroundColorAttributeName:[UIColor redColor]} forState:UIControlStateSelected];
//颜色
[[UITabBar appearance] setBarTintColor:[UIColor greenColor]];
//图片
// [[UITabBar appearance] setBackgroundImage:[UIImage imageNamed:@"bgImage.png"]];
}
swift:
if #available(iOS 15.0,*) {
let tabBarAppearanc = UITabBarAppearance.init()
//颜色
// tabBarAppearanc.backgroundColor = UIColor.green
//图片
tabBarAppearanc.backgroundImage = UIImage.init(named: "bgImage.png")
tabBarAppearanc.stackedLayoutAppearance.selected.titleTextAttributes = [NSAttributedString.Key.foregroundColor:UIColor.red]
// tabBarAppearanc.stackedLayoutAppearance.normal.titleTextAttributes = .....
self.tabBar.standardAppearance = tabBarAppearanc
self.tabBar.scrollEdgeAppearance = tabBarAppearanc
}else{
UITabBarItem.appearance().setTitleTextAttributes([NSAttributedString.Key.foregroundColor: UIColor.black], for: .normal)
UITabBarItem.appearance().setTitleTextAttributes([NSAttributedString.Key.foregroundColor: UIColor.red], for: .normal)
//颜色
UITabBar.appearance().barTintColor = UIColor.green
//图片
// UITabBar.appearance().backgroundImage = UIImage.init(named: "bgImage.png")
}
左边是iOS 15，右边是iOS 14
iShot2021-12-15 14.01.05.gif
4：UIButton
image.png
之前我们可能要自定义一个类来实现这种按钮，但是现在苹果新增了特性
object-c:
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
button.backgroundColor = [UIColor greenColor];
if (@available(iOS 15.0, *)) {
UIButtonConfiguration *conf = [UIButtonConfiguration tintedButtonConfiguration];
conf.cornerStyle = UIButtonConfigurationCornerStyleMedium;
[conf setImagePadding:5];
[conf setTitle:@"大标题"];
[conf setSubtitle:@"副标题"];
[conf setImage:[UIImage imageNamed:@"btnImage.png"]];
conf.imagePlacement = NSDirectionalRectEdgeLeading;
button.configuration = conf;
} else {
// Fallback on earlier versions
}
swift:
let button:UIButton = UIButton.init(type: .custom)
button.backgroundColor = UIColor.green
if #available(iOS 15.0, *) {
var conf = UIButton.Configuration.tinted()
conf.cornerStyle = UIButton.Configuration.CornerStyle.medium
conf.imagePadding = 5
conf.title = "大标题"
conf.subtitle = "副标题"
conf.image = UIImage.init(named: "btnImage.png")
conf.imagePlacement = .leading
button.configuration = conf
}else{
}
WeChat2d513139892f4b37509169da2df8eece.png
5：UIImage
图片的尺寸变换
object-c:
UIImage *modeImg = [UIImage imageNamed:@"bgImage.png"];
NSLog(@"图片原尺寸%@",NSStringFromCGSize(modeImg.size));
if (@available(iOS 15.0, *)) {
modeImg = [modeImg imageByPreparingThumbnailOfSize:CGSizeMake(220, 100)];
NSLog(@"**111111**变换后图片原尺寸%@",NSStringFromCGSize(modeImg.size));
[modeImg prepareThumbnailOfSize:CGSizeMake(220, 100) completionHandler:^(UIImage * _Nullable) {
NSLog(@"###222###变换后图片原尺寸%@",NSStringFromCGSize(modeImg.size));
}];
} else {
// Fallback on earlier versions
};
//打印值
//2021-12-15 15:48:17.590981+0800 iOS15UI[71637:683127] 图片原尺寸{674, 206}
//2021-12-15 15:48:17.598647+0800 iOS15UI[71637:683127] **111111**变换后图片原尺寸{220, 100}
//2021-12-15 15:48:17.600537+0800 iOS15UI[71637:684293] ###222###变换后图片原尺寸{220, 100}
swift:
var modImg = UIImage.init(named: "btnImage.png")
print("原图片尺寸%@",modImg?.size as Any)
if #available(iOS 15.0, *) {
modImg = modImg?.preparingThumbnail(of: CGSize(width: 220, height: 100))
print("**111111**变换后图片原尺寸%@",modImg?.size as Any)
modImg?.prepareThumbnail(of: CGSize(width: 220, height: 100)){img in
print("###222###变换后图片原尺寸%@",modImg?.size as Any)
}
}
//打印值
//原图片尺寸%@ Optional((124.0, 120.0))
//**111111**变换后图片原尺寸%@ Optional((220.0, 100.0))
//###222###变换后图片原尺寸%@ Optional((220.0, 100.0))
其它
UILabel显示的文字比设置font大，在iOS 15中，adjustsFontSizeToFitWidth为true时，高度不能跟设置的 Font 一样大。固定宽度时文字显示不全，之前正好显示完文字，在iOS 15上可能显示不全，增加宽度即可
demo：
oc代码：https://github.com/xinsun001/iOS-15UI-oc.git
swift代码：https://github.com/xinsun001/iOS-15UI-swift.git
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