設置UI控件的Layer屬性(邊框可見，邊框顏色，邊框寬度，邊框圓角)

設置UI控件的Layer屬性 #import "ViewController.h" @interface ViewController () @property (strong, nonatomic) IBOutlet UIButton *btnSave; @property (strong, nonatomic) IBOutlet UIView *yellowView; @end @i

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