1、把蘋果8手機打開找到支付寶，在支付寶的首頁，點擊付款的選項。
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2、出來的頁面裏默認是余額寶付款，然後點擊下面的余額寶。
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3、會跳出壹個選擇優先付款方式，接著點擊添加信用卡的選項。
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4、在添加銀行卡信息的頁面裏，輸入持卡人和信用卡的卡號，然後點擊下壹步。
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5、在填寫銀行卡信息的頁面裏輸入有效期和手機號，再點擊下壹步。
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6、在驗證手機號的頁面裏，點擊右邊的選項，就會有驗證碼發送到手機，輸入驗證碼，然後點擊下壹步。
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7、最後就添加信用卡付款完成了，以後的付款就會用信用卡優先支付。
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