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iOS 13適配匯總(推薦)

來源:本站原創(chuàng)|時(shí)間:2020-01-11|欄目:IOS|點(diǎn)擊: 次

隨著iPhone 11的發(fā)布,iOS 13適配也提上了日程,接下來就開發(fā)中升級(jí)iOS13的手機(jī)可能出現(xiàn)的問題

Xcode: 11.0
iOS : 13.0

UIViewController 模態(tài)彈出界面

viewController.present(presentVC, animated: true, completion: nil)

在調(diào)用模態(tài)彈出視圖,會(huì)發(fā)現(xiàn)彈出的界面沒有全屏。如圖


通過多次的嘗試,發(fā)現(xiàn)在低版本里面不會(huì)發(fā)生這種情況(iOS12及以下),于是我查閱了最新的開發(fā)文檔,發(fā)現(xiàn)了端倪,主要還是因?yàn)槲覀冎昂雎粤?strong>UIViewController里面的一個(gè)屬性,即:modalPresentationStyle

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
}

通過查看API 可以看到,iOS 13 新增一個(gè):automatic類型,默認(rèn)情況下就是這個(gè)所以才會(huì)彈出不是全屏的界面。如果我們想要修改為全屏的話

可以:presentVC.modalPresentationStyle = .fullScreen設(shè)置為全屏即可

KVC 限制

iOS13以后已經(jīng)不能肆無忌憚的通過 KVC來修改一些沒有暴露出來的屬性了。

*** Terminating app due to uncaught exception 'NSGenericException', reason: 'Access to xxx's _xxx ivar is prohibited. This is an application bug'

我們常用的有

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

下面方法替換

///分別設(shè)置字體大小和顏色(富文本)
textField.attributedPlaceholder = NSAttributedString.init(string: "請(qǐng)輸入....", attributes: [NSAttributedString.Key.foregroundColor: UIColor.red], [NSAttributedString.Key.font: UIFont.systemFont(ofSize: 15)])

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

UISegmentedControl 默認(rèn)樣式改變

默認(rèn)樣式變?yōu)榘椎缀谧?,如果設(shè)置修改過顏色的話,頁(yè)面需要修改

UITabbar

如果之前有通過TabBar上圖片位置來設(shè)置紅點(diǎn)位置,在iOS13上會(huì)發(fā)現(xiàn)顯示位置都在最左邊去了。遍歷UITabBarButton的subViews發(fā)現(xiàn)只有在TabBar選中狀態(tài)下才能取到UITabBarSwappableImageView,解決辦法是修改為通過UITabBarButton的位置來設(shè)置紅點(diǎn)的frame

App啟動(dòng)過程中,部分View可能無法實(shí)時(shí)獲取到frame

// 只有等執(zhí)行完 UIViewController 的 viewDidAppear 方法以后,才能獲取到正確的值,在viewDidLoad等地方 frame Size 為 0,例如:
 UIApplication.shared.statusBarFrame

廢棄UIWebView

查看API可以看到:iOS 2.0 到 iOS 11.0
在12.0就已經(jīng)被廢棄,部分APP使用webview時(shí), 審核被拒

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

CNCopyCurrentNetworkInfo

iOS13 以后只有開啟了 Access WiFi Information capability,才能獲取到 SSID 和 BSSID wi-fi or wlan 相關(guān)使用變更
最近收到了蘋果的郵件,說獲取WiFi SSID的接口CNCopyCurrentNetworkInfo 不再返回SSID的值。不仔細(xì)看還真會(huì)被嚇一跳,對(duì)物聯(lián)網(wǎng)的相關(guān)APP簡(jiǎn)直是炸彈。仔細(xì)看郵件還好說明了可以先獲取用戶位置權(quán)限才能返回SSID。
注意:目本身已經(jīng)打開位置權(quán)限,則可以直接獲取

- (NSString*) getWifiSsid {
  if (@available(iOS 13.0, *)) {
    //用戶明確拒絕,可以彈窗提示用戶到設(shè)置中手動(dòng)打開權(quán)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開當(dāng)前應(yīng)用的設(shè)置頁(yè)面
      //[[UIApplication sharedApplication] openURL:[NSURL URLWithString:UIApplicationOpenSettingsURLString]];
      return nil;
    }
    CLLocationManager* cllocation = [[CLLocationManager alloc] init];
    if(![CLLocationManager locationServicesEnabled] || [CLLocationManager authorizationStatus] == kCLAuthorizationStatusNotDetermined){
      //彈框提示用戶是否開啟位置權(quán)限
      [cllocation requestWhenInUseAuthorization];
      usleep(50);
      //遞歸等待用戶選選擇
      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;
}

同意打印:如下

 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>;
}

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