ios - 以编程方式从 iphone 调用 USSD 代码

Question

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Answer 1

您不能调用包含 * 或 # 字符的号码。出于安全原因，Apple 不允许在拨号字符串中使用它们。

Apple Documentation says :

To prevent users from maliciously redirecting phone calls or changing the behavior of a phone or account, the Phone app supports most, but not all, of the special characters in the tel scheme. Specifically, if a URL contains the * or # characters, the Phone app does not attempt to dial the corresponding phone number. If your app receives URL strings from the user or an unknown source, you should also make sure that any special characters that might not be appropriate in a URL are escaped properly. For native apps, use the stringByAddingPercentEscapesUsingEncoding: method of NSString to escape characters, which returns a properly escaped version of your original string.