解决iOS打电话提示框反应慢

添加类方法，然后直接调用

+ (void)callPhoneStr:(NSString*)phoneStr withVC:(UIViewController *)selfvc{
    if (phoneStr.length >= 10) {
        NSString *str2 = [[UIDevice currentDevice] systemVersion];
        if ([str2 compare:@"10.2" options:NSNumericSearch] == NSOrderedDescending || [str2 compare:@"10.2" options:NSNumericSearch] == NSOrderedSame)
        {
            NSString* PhoneStr = [NSString stringWithFormat:@"telprompt://%@",phoneStr];
            [[UIApplication sharedApplication] openURL:[NSURL URLWithString:PhoneStr] options:@{} completionHandler:^(BOOL success) {
                NSLog(@"phone success");
            }];
            
        }else {
            NSMutableString* str1 = [[NSMutableString alloc]initWithString:phoneStr];// 存在堆区，可变字符串
            if (phoneStr.length == 10) {
                [str1 insertString:@"-"atIndex:3];// 把一个字符串插入另一个字符串中的某一个位置
                [str1 insertString:@"-"atIndex:7];// 把一个字符串插入另一个字符串中的某一个位置
            }else {
                [str1 insertString:@"-"atIndex:3];// 把一个字符串插入另一个字符串中的某一个位置
                [str1 insertString:@"-"atIndex:8];// 把一个字符串插入另一个字符串中的某一个位置
            }
            NSString * str = [NSString stringWithFormat:@"是否拨打电话\n%@",str1];
            UIAlertController *alert = [UIAlertController alertControllerWithTitle:str message: nil preferredStyle:UIAlertControllerStyleAlert];
            // 设置popover指向的item
            alert.popoverPresentationController.barButtonItem = selfvc.navigationItem.leftBarButtonItem;
            // 添加按钮
            [alert addAction:[UIAlertAction actionWithTitle:@"呼叫" style:UIAlertActionStyleDestructive handler:^(UIAlertAction *action) {
                NSLog(@"点击了呼叫按钮10.2下");
                NSString* PhoneStr = [NSString stringWithFormat:@"tel://%@",phoneStr];
                if ([PhoneStr hasPrefix:@"sms:"] || [PhoneStr hasPrefix:@"tel:"]) {
                    UIApplication * app = [UIApplication sharedApplication];
                    if ([app canOpenURL:[NSURL URLWithString:PhoneStr]]) {
                        [app openURL:[NSURL URLWithString:PhoneStr]];
                    }
                }
            }]];
            [alert addAction:[UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction *action) {
                NSLog(@"点击了取消按钮");
            }]];
            [selfvc presentViewController:alert animated:YES completion:nil];
        }
    }
}