iOS 拨打电话优化

最近在测试项目发现项目中调用电话的在iOS 10上会出现卡顿,点击调用会有一小段延,现在是这样实现拨打电话的:

NSMutableString *str=[[NSMutableString alloc] initWithFormat:@"tel:%@",_phoneNum];
        UIWebView *callWebview = [[UIWebView alloc] init];
        [callWebview loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:str]]];
        [self.view addSubview:callWebview];

优化如下:

+ (void)callPhoneStr:(NSString*)phoneStr  withVC:(UIViewController *)selfvc{
    NSString *str2 = [[UIDevice currentDevice] systemVersion];
    
    if ([str2 compare:@"10.2" options:NSNumericSearch] == NSOrderedDescending || [str2 compare:@"10.2" options:NSNumericSearch] == NSOrderedSame)
    {
        NSLog(@">=10.2");
        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]];
            }
        }
    }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 %@",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];
    }
    
}