iOS 12适配以及问题小记

时间:2022-09-20 08:25:43

前言

本文主要给大家介绍了关于iOS12适配及问题的相关内容,分享出来供大家参考学习,下面话不多说了,来一起看看详细的介绍吧

版本信息

Xcode: Version 10.0 beta (10L176w)
macOS: 10.14 Beta (18A293u)
iOS: 12.0(16A5288q)

问题及解决过程

1,StatusBar内部结构改变

现象:crash
crash log:
1,-[_UIStatusBarIdentifier isEqualToString:]: unrecognized selector sent to instance 0x283452820
2,Terminating app due to uncaught exception ‘NSInvalidArgumentException', reason: ‘-[_UIStatusBarIdentifier isEqualToString:]: unrecognized selector sent to instance 0x283452820'

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问题代码和解决方法

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+ (NSString *)getIphoneXNetWorkStates {
 UIApplication *app = [UIApplication sharedApplication];
 id statusBar = [[app valueForKeyPath:@"statusBar"] valueForKeyPath:@"statusBar"];
 id one = [statusBar valueForKeyPath:@"regions"];
 id two = [one valueForKeyPath:@"trailing"];
 NSArray *three = [two valueForKeyPath:@"displayItems"];
 NSString *state = @"无网络";
 for (UIView *view in three) {
  //alert: iOS12.0 情况下identifier的变成了类"_UIStatusBarIdentifier"而不是NSString,所以会在调用“isEqualToString”方法时发生crash,
  //修改前
//  NSString *identifier = [view valueForKeyPath:@"identifier"];
  //修改后
  NSString *identifier = [[view valueForKeyPath:@"identifier"] description];
  if ([identifier isEqualToString:@"_UIStatusBarWifiItem.signalStrengthDisplayIdentifier"]) {
   id item = [view valueForKeyPath:@"_item"];
 
   //alert: 这个问题和上边一样itemId是_UIStatusBarIdentifier 类型,不是string
   NSString *itemId = [[item valueForKeyPath:@"identifier"] description];
   if ([itemId isEqualToString:@"_UIStatusBarWifiItem"]) {
    state = @"WIFI";
   }
   state = @"不确定";
 
  } else if ([identifier isEqualToString:@"_UIStatusBarCellularItem.typeDisplayIdentifier"]) {
   UIView *statusBarStringView = [view valueForKeyPath:@"_view"];
   // 4G/3G/E
   state = [statusBarStringView valueForKeyPath:@"text"];
  }
 
 }
 return state;
}

总结

以上就是这篇文章的全部内容了,希望本文的内容对大家的学习或者工作具有一定的参考学习价值,如果有疑问大家可以留言交流,谢谢大家对服务器之家的支持。

原文链接:https://blog.csdn.net/wxs0124/article/details/80613847