52张牌牛牛的概率

To understand Passbook, we need to see a Pass in action. Download the example Pass from:
http://passkit.pro/example-generic-pkpass
If you open this link within Mobile Safari, on an iPhone or iPod Touch running iOS, you will be presented with the Pass and the option to add it to your Passbook:
Alternatively, you can download the Pass on a Mac or PC and e-mail it to yourself, and then open the e-mail within the Mail app on an iPhone or iPod Touch. Tapping the Pass attachment link will present the Pass.
If you choose to add the Pass to your Passbook app, the displayed Pass will disappear, having been filed away within your Passbook. Now, click on the home button to return to the home screen and launch the Passbook app. In the app you will now see the Pass that was just added. It contains information specified by the app creator and can be presented when interacting with the company providing the service. Additional information can be placed on the back of the Pass. Tap the i button in the top-right hand corner of the Pass, to reveal this information.

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