Phase-difference-based macro focusing method and apparatus for camera lens

A lens focus method comprising:

• obtaining a target phase difference of a preview image captured by a main camera lens in a macro shooting mode;
• obtaining a calibration data set corresponding to the macro shooting mode, where the calibration data set includes calibration phase differences and calibration currents for reference calibrated macro distances, wherein the reference calibrated macro distances include multiple distances, and the reference calibrated macro distances correspond to multiple calibration phase differences and one calibration current;
• performing arithmetic operations on the multiple calibration phase differences corresponding to the reference calibrated macro distances to obtain a target phase value;
• selecting the calibration phase difference that matches the target phase difference from the calibration data set based on the target phase value;
• determining a target current based on a calibration current corresponding to a calibration phase difference that matches the target phase difference;
• and
• driving the main camera lens to focus according to the target current.