iOS12、iOS11、iOS10、iOS9常见适配

if (self.traitCollection.forceTouchCapability == UIForceTouchCapabilityAvailable) {

}
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self.traitCollection.forceTouchCapability == .availible
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UIViewController中新增：
- (void)viewSafeAreaInsetsDidChange;
UIView中新增：
- (void)viewSafeAreaInsetsDidChange；
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#import "Adaptive11VC.h"
static inline UIEdgeInsets sgm_safeAreaInset(UIView *view) {
    if (@available(iOS 11.0, *)) {
        return view.safeAreaInsets;
    }
    return UIEdgeInsetsZero;
}

@interface Adaptive11VC ()
@end
@implementation Adaptive11VC
- (void)viewDidLoad {
    [super viewDidLoad];
}
- (void)testSafeArea {
    UIEdgeInsets safeAreaInsets = sgm_safeAreaInset(self.view);
    NSLog(@"safeAreaInsets = %@", NSStringFromUIEdgeInsets(safeAreaInsets));
}
- (void)viewSafeAreaInsetsDidChange {
    [super viewSafeAreaInsetsDidChange];
    [self testSafeArea];
}
@end
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// 方式一：（不推荐）修改额外的安全区域
if (@available(iOS 11.0, *)) {
    self.additionalSafeAreaInsets = UIEdgeInsetsMake(-44, 0, 0, 0);
}
else {
    // Fallback on earlier versions
}
// 方式二：（推荐）设置为不自动调整
if (@available(iOS 11.0, *)) {
    // 作用于指定的UIScrollView
    self.tableView.contentInsetAdjustmentBehavior = UIScrollViewContentInsetAdjustmentNever;
    // 作用与所有的UIScrollView
    UIScrollView.appearance.contentInsetAdjustmentBehavior = UIScrollViewContentInsetAdjustmentNever;
}
else {
    self.automaticallyAdjustsScrollViewInsets = NO;
}
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#import <LocalAuthentication/LocalAuthentication.h>
/**
 检测TouchID是否可用
 */
- (void)checkBiometrics {
    LAContext *context = [[LAContext alloc] init];
    BOOL success = [context canEvaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics
                                        error:nil];
    if ( success ) {
        NSLog(@"can use");
    }
    else {
        NSLog(@"can`t use ");
    }
}
/**
 在验证TouchID可用的情况下使用
 */
- (void)excuteBiometrics {
    LAContext *context = [[LAContext alloc] init];
    context.localizedFallbackTitle = @"自定义标题";
    [context evaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics
            localizedReason:@"为什么使用TouchID写这里"
                      reply:^(BOOL success, NSError * _Nullable error) {
        if ( success ) {
            // 指纹验证成功
        }
        else {
            switch (error.code) {
                case LAErrorUserFallback:{
                    NSLog(@"用户选择输入密码");
                    break;
                }
                case LAErrorAuthenticationFailed:{
                    NSLog(@"验证失败");
                    break;
                }
                case LAErrorUserCancel:{
                    NSLog(@"用户取消");
                    break;
                }
                case LAErrorSystemCancel:{
                    NSLog(@"系统取消");
                    break;
                }
                // 以下三种情况如果提前检测TouchID是否可用就不会出现
                case LAErrorPasscodeNotSet:{
                    break;
                }
                case LAErrorTouchIDNotAvailable:{
                    break;
                }
                case LAErrorTouchIDNotEnrolled:{
                    break;
                }
                default:
                    break;
            }
        }
    }];
}
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{
    "extent" : "full-screen",
    "idiom" : "iphone",
    "subtype" : "2436h",
    "filename" : "1125_2436.png",
    "minimum-system-version" : "11.0",
    "orientation" : "portrait",
    "scale" : "3x"
}
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NSLocationWhenInUseUsageDescription
NSLocationAlwaysAndWhenInUseUsageDescription
NSLocationAlwaysUsageDescription
NSLocationAlwaysAndWhenInUseUsageDescription  // 为 iOS 11 中新引入的一个 Key。
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<key>NSPhotoLibraryUsageDescription</key><string>App需要您的同意,才能访问相册</string>

<key>NSCameraUsageDescription</key><string>App需要您的同意,才能访问相机</string>

<key>NSMicrophoneUsageDescription</key><string>App需要您的同意,才能访问麦克风</string>

<key>NSLocationUsageDescription</key><string>App需要您的同意,才能访问位置</string>

<key>NSLocationWhenInUseUsageDescription</key><string>App需要您的同意,才能在使用期间访问位置</string>

<key>NSLocationAlwaysUsageDescription</key><string>App需要您的同意,才能始终访问位置</string>

<key>NSCalendarsUsageDescription</key><string>App需要您的同意,才能访问日历</string>

<key>NSRemindersUsageDescription</key><string>App需要您的同意,才能访问提醒事项</string>

<key>NSMotionUsageDescription</key><string>App需要您的同意,才能访问运动与健身</string>

<key>NSHealthUpdateUsageDescription</key><string>App需要您的同意,才能访问健康更新 </string>

<key>NSHealthShareUsageDescription</key><string>App需要您的同意,才能访问健康分享</string>

<key>NSBluetoothPeripheralUsageDescription</key><string>App需要您的同意,才能访问蓝牙</string>

<key>NSAppleMusicUsageDescription</key><string>App需要您的同意,才能访问媒体资料库</string>
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// iOS系统版本 >= 10.0
{
    NSURL *url = [NSURL URLWithString:UIApplicationOpenSettingsURLString];
    if ([[UIApplication sharedApplication] canOpenURL:url]) {
        [[UIApplication sharedApplication] openURL:url];
    }
}
return;
// iOS系统版本 >= 10.0
// But! 不建议这样做哦，官方文档中说过:
// `URL is now considered a private API and use will result in app rejection`.
// 虽然是有可能躲过苹果的检测，但是苹果如果发现你这样用了，app上架是有被拒的风险的.
{
    NSURL *url = [NSURL URLWithString:@"APP-Prefs:root=WIFI"];
    if ([[UIApplication sharedApplication] canOpenURL:url]) {
        if (@available(iOS 10.0, *)) {
            [[UIApplication sharedApplication] openURL:url 
                                               options:@{} 
                                     completionHandler:nil];
        } else {
            // Fallback on earlier versions
        }
    }
}
// iOS系统版本 < 10.0
{
    NSURL *url = [NSURL URLWithString:@"prefs:root=WIFI"];
    if ([[UIApplication sharedApplication] canOpenURL:url]) {
        [[UIApplication sharedApplication] openURL:url];
    }
}
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<key>NSAppTransportSecurity</key>
<dict>
    <key>NSAllowsArbitraryLoads</key>
    <true/>
</dict>
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<key>LSApplicationQueriesSchemes</key>
<array>
    <string>weixin</string>
    <string>wechat</string>
</array>
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// 修改状态栏的样式为白色
// 'setStatusBarStyle(_:animated:)' was deprecated in iOS 9.0: Use -[UIViewController preferredStatusBarStyle]
UIApplication.shared.setStatusBarStyle(.lightContent, animated: true)
// 隐藏状态栏
// 'setStatusBarHidden(_:with:)' was deprecated in iOS 9.0: Use -[UIViewController prefersStatusBarHidden]
UIApplication.shared.setStatusBarHidden(true, with: .fade)
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-[UIViewController preferredStatusBarstyle]
-[UIViewController preferredStatusBarHidden]
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