Solution to the problem of delay in calling the system phone in iOS 10

Preface

I encountered some problems in development recently. I found that when I called the system on iOS 10, I found that the pop-up box would be delayed by about 2 seconds. I was very unhappy. After studying it, I found that openURL would block the main thread in iOS 10 and later

So, before making a call, make a judgment, and I won’t say much, let’s take a look at the detailed introduction together.

Sample code:

// Make a call+ (void)callPhone:(NSString *)phoneNum { 
  
 if ([ISNULL(phoneNum) length] == 0) { 
  [SVProgressHUD showErrorWithStatus:@"Dialing failed, mobile phone number does not exist" duration:1.0 dismiss:nil]; 
  return; 
 } 
  
 NSString *callPhone = [NSString stringWithFormat:@"telprompt://%@", phoneNum]; 
  
 /// Solve the problem of delay in pop-up dial box in iOS10 and above systems /// Plan 1 if ([[UIDevice currentDevice].systemVersion floatValue] &gt;= 10.0) { 
  /// 10 and above systems  [[UIApplication sharedApplication] openURL:[NSURL URLWithString:callPhone] options:@{} completionHandler:nil]; 
 } else { 
  /// Systems below 10  [[UIApplication sharedApplication] openURL:[NSURL URLWithString:callPhone]]; 
 } 
  
 /// Plan 2// dispatch_async(dispatch_get_global_queue(0, 0), ^{ 
//  [[UIApplication sharedApplication] openURL:[NSURL URLWithString:callPhone]]; 
// }); 
  
}

Regarding the method of making calls, the reason for the delay in pop-up box, the current preliminary diagnosis is that openURL will block the main thread in iOS 10 and afterwards. Solution 2 will not work on iOS 11

Summarize

The above is the entire content of this article. I hope that the content of this article has certain reference value for everyone's study or work. If you have any questions, you can leave a message to communicate. Thank you for your support.