What's the use of CGRectGetMinX?

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I. CGRectGetMinXCGRectGetMinY

CGRectGetMinX (control .frame) gets the smallest x-value control in the control .x

CGRectGetMinY (control .frame) gets the smallest y-value control in the control .y

CGRectGetMinX represents the X coordinate of a current control frame CGRectGetMinY represents the Y coordinate of a current control frame

II. CGRectGetMaxXCGRectGetMaxY

CGRectGetMaxX (control .frame) gets the maximum x value control in the control .x + control .width

CGRectGetMaxY (control .frame) gets the maximum y value control in the control .y + control .height

CGRectGetMaxX to get a frame maximum X coordinate CGRectGetMaxY to get a frame maximum Y coordinate

III. CGRectGetMidXCGRectGetMidY

CGRectGetMidX (control .frame); get the center x value control of the control .x + control .width / 2 is simply to get the center value coordinates of the current control x value

CGRectGetMidY (control .frame); get the center y value of the control. Y + control .height / 2 is simply to get the center value coordinates of the current control y value.

CGRectGetMidX denotes the X coordinate of a frame center point, and CGRectGetMidY represents the Y coordinate of a frame center point.

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