Existing smartphones store multiple NFC card information. When the NFC antenna of the phone is close to the card reader, it is usually necessary to open the APP to select NFC card information or default to one card information to be transmitted to the card reader. It is not possible to quickly select or switch cards among multiple cards. For example, after using the NFC function to swipe the subway card, the phone needs to open the car access control and community access control again. It is necessary to open the mobile NFC card information management APP to select the community access control card and then swipe the mobile NFC access control, which causes inconvenience.
（现有的智能手机存储多个 NFC 卡信息。当手机的NFC天线靠近读卡器时，通常需要打开APP选择NFC卡信息或默认一个卡信息传输到读卡器。无法在多张卡之间快速选择或切换卡。例如，使用NFC功能刷完地铁卡后，手机需要重新打开车内门禁和小区门禁。需要打开手机NFC卡信息管理APP选择社区门禁卡，然后刷手机NFC门禁，造成不便。）
Divide the smartphone screen into multiple areas, and users can freely define corresponding NFC information for each area. When the screen is turned off and not unlocked, select NFC card information by pressing different screen areas with your fingers. When the mobile NFC is close to the card reader, the selected card information will be transmitted to the reader(将智能手机屏幕划分多个区域，每个区域手机用户可以自由定义对应NFC信息。在熄屏’不解锁的情况下，通过手指按压不同屏幕区域选择NFC卡片信息，手机NFC贴近读卡器时将选择的卡片信息传递给读卡器。)
Below, the method will be further explained in conjunction with the accompanying drawings and embodiments.
Figure 1 is a schematic diagram of a utility model;
Figure 2 is the flowchart of the present utility model;
NFC reader, 2. Mobile screen partition, 3. NFC signal in Figure 1.
In Figure 2, 1. Press the area of the screen partition with your finger. 2. Place the phone close to the NFC reader. 3. The phone senses the returned NFC signal. 4. The phone detects the pressed area.（
下面结合附图和实施例对方法进一步说明。
图1为实用新型示意图；
图2为本实用新型流程图；
图1中1.NFC读取器，2.手机屏幕分区，3.NFC信号。
图2中1.手指按压屏幕分区的区域2.手机贴近NFC读取器3.手机感应到返回的NFC信号4.手机检测到按压的区域，5.是否检测到手机用户按压区域的动作，6.检测到按压区域，根据按压区域做出匹配相对应的NFC的动作7.选择用户所需的NFC卡8.NFC卡收到信息并发出卡片信息9.NFC读卡器收到NFC卡的信息。）
For example, a smartphone user has N NFC virtual cards in their phone. Users can divide the smartphone screen into N areas, distinguished as A area, B area, C area..., each area controls different NFC. When a smartphone user holds down the B area that controls NFC (such as virtual access cards) and brings the phone close to the NFC card reader (such as access control). The mobile phone will sense NFC signals (access control signals), triggering the phone to detect the area that the user is pressing. There are two possibilities. Firstly, if the user's pressing action is not detected, the NFC card corresponding to the default A zone (set as the default here) will be selected. If the user's pressing action is detected and it is detected that the pressing is in Zone B (the partition corresponding to the access card), then the NFC information corresponding to Zone B is triggered. The smartphone receives this message, and the corresponding NFC sends out a card message. The NFC card reader (access control device) receives the message and reacts (door opens).（例如，一智能手机用户手机中有N个NFC虚拟卡。用户可以将智能手机屏幕分为N个区域，分辨为A区、B区、C区······，每个区域分别控制不同的NFC。当智能手机用户按住控制NFC（如虚拟门禁卡）的B区域并将手机靠近NFC读卡器（如门禁）。手机将会感应到NFC信号（门禁信号），触发手机检测用户正在按压的区域。有两种可能性，第一没有检测到用户的按压动作则选择默认的A区（这里把A区设为默认）所对应的NFC卡。第二检测到用户的按压动作并检测出按压的是B区域（门禁卡所对应的分区），则触发B区域所对应的NFC信息。智能手机收到此信息，相对应的NFC发出卡片信息，NFC读卡器（门禁设备）收到信息，做出反应（门打开）。）
图1 image1
图2 image2
