iOS 13适配汇总(推荐)

Defines the presentation style that will be used for this view controller when it is presented modally. Set this property on the view controller to be presented, not the presenter.
 If this property has been set to UIModalPresentationAutomatic, reading it will always return a concrete presentation style. By default UIViewController resolves UIModalPresentationAutomatic to UIModalPresentationPageSheet, but other system-provided view controllers may resolve UIModalPresentationAutomatic to other concrete presentation styles.
 Defaults to UIModalPresentationAutomatic on iOS starting in iOS 13.0, and UIModalPresentationFullScreen on previous versions. Defaults to UIModalPresentationFullScreen on all other platforms.


public enum UIModalPresentationStyle : Int {
  case fullScreen
  
  @available(iOS 3.2, *)
  case pageSheet
  @available(iOS 3.2, *)
  case formSheet

  @available(iOS 3.2, *)
  case currentContext

  @available(iOS 7.0, *)
  case custom

  @available(iOS 8.0, *)
  case overFullScreen

  @available(iOS 8.0, *)
  case overCurrentContext

  @available(iOS 8.0, *)
  case popover

  
  @available(iOS 7.0, *)
  case none

  @available(iOS 13.0, *)
  case automatic
}

// UITextField 的 _placeholderLabel
    let textField = UITextField.init()
    textField.setValue(UIColor.red, forKey: "_placeholderLabel.textColor")
    
    /// UISearchBar 的 _searchField
    [searchBar valueForKey:@"_searchField"]

///分别设置字体大小和颜色（富文本）
textField.attributedPlaceholder = NSAttributedString.init(string: "请输入....", attributes: [NSAttributedString.Key.foregroundColor: UIColor.red], [NSAttributedString.Key.font: UIFont.systemFont(ofSize: 15)])

 /// UISearchBar 用 searchField代替
bar.value(forKey: "searchField") as! UITextField

// 只有等执行完 UIViewController 的 viewDidAppear 方法以后，才能获取到正确的值，在viewDidLoad等地方 frame Size 为 0，例如：
 UIApplication.shared.statusBarFrame

@available(iOS, introduced: 2.0, deprecated: 12.0, message: "No longer supported; please adopt WKWebView.")
open class UIWebView : UIView, NSCoding, UIScrollViewDelegate {
	.........
	.........
	.........
}

- (NSString*) getWifiSsid {
  if (@available(iOS 13.0, *)) {
    //用户明确拒绝，可以弹窗提示用户到设置中手动打开权限
    if ([CLLocationManager authorizationStatus] == kCLAuthorizationStatusDenied) {
      NSLog(@"User has explicitly denied authorization for this application, or location services are disabled in Settings.");
      //使用下面接口可以打开当前应用的设置页面
      //[[UIApplication sharedApplication] openURL:[NSURL URLWithString:UIApplicationOpenSettingsURLString]];
      return nil;
    }
    CLLocationManager* cllocation = [[CLLocationManager alloc] init];
    if(![CLLocationManager locationServicesEnabled] || [CLLocationManager authorizationStatus] == kCLAuthorizationStatusNotDetermined){
      //弹框提示用户是否开启位置权限
      [cllocation requestWhenInUseAuthorization];
      usleep(50);
      //递归等待用户选选择
      return [self getWifiSsidWithCallback:callback];
    }
  }
  NSString *wifiName = nil;
  CFArrayRef wifiInterfaces = CNCopySupportedInterfaces();
  if (!wifiInterfaces) {
    return nil;
  }
  NSArray *interfaces = (__bridge NSArray *)wifiInterfaces;
  for (NSString *interfaceName in interfaces) {
    CFDictionaryRef dictRef = CNCopyCurrentNetworkInfo((__bridge CFStringRef)(interfaceName));

    if (dictRef) {
      NSDictionary *networkInfo = (__bridge NSDictionary *)dictRef;
      NSLog(@"network info -> %@", networkInfo);
      wifiName = [networkInfo objectForKey:(__bridge NSString *)kCNNetworkInfoKeySSID];
      CFRelease(dictRef);
    }
  }
  CFRelease(wifiInterfaces);
  return wifiName;
}

 network info -> {
BSSID = "44:dd:fb:43:91:ff";
SSID = "Asus_c039";
SSIDDATA = <41737573 5f633033 39>;
}
不同意
network info -> {
BSSID = "00:00:00:00:00:00";
SSID = WLAN;
SSIDDATA = <574c414e>;
}