How to use buttons to receive user input in the iOS11 application view

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Use buttons to receive user input

Buttons are the most commonly used and simplest controls in iOS applications, which are often used to respond to user click events, as shown in figure 2.1. In figure 2.1, the blue rectangle is a button with the title "login". After iOS 7, the button is just a piece of ordinary text, without outline, border, background color, or other decorative features (for beauty, buttons in many applications still have a background, like the button in figure 2.1). Buttons are generally implemented using the UIButton class. This section will mainly explain the addition of buttons, beautification of buttons and how to achieve the response of buttons.

Figure 2.1 QQ login interface

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