iOS 拨打电话的三种方式

1:直接拨打, 不会弹出提示框

NSString *phone = [NSString stringWithFormat:@"tel:%@", @"150xxxxxxxx"];
[UIApplication.sharedApplication openURL:[NSURL URLWithString:phone] options:@{} completionHandler:nil];

2: 会弹出提示框

NSString *phone = [NSString stringWithFormat:@"tel:%@",@"150xxxxxxxx"];

UIWebView *callWebView = UIWebView.new;
[callWebView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:phone]]];
[self.view addSubview:callWebView];

3:会弹出提示框(注意:这里是telprompt, 推荐用这种)

NSString *phone = [NSString stringWithFormat:@"telprompt://%@",@"150xxxxxxxx"];

[UIApplication.sharedApplication openURL:[NSURL URLWithString:phone] options:@{} completionHandler:nil];

参考: https://www.jianshu.com/p/73872e332b24