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我正在尝试通过代码在 uibutton 上实现线性渐变效果。
默认状态下,按钮颜色在顶部变亮。在 TouchDown 上,此效果移动到按钮的底部。按下结束后,它再次回到默认状态。
我真的很感激帮助。提前致谢。