添加阴影和设置圆角

圆角:

	CALayer * layer = [theView layer];
	
	[layer setMasksToBounds:YES];
	[layer setCornerRadius:theRadius];
	[layer setBorderWidth:theBorderWidth];
	[layer setBorderColor:theColor.CGColor];

其中:theView(UIView)为目标view
theRadius(float)为圆角半径
theBorderWidth(float)为边框大小
theColor(UIColor)为边框颜色

---------------------------我割---------------------------

阴影:

	CALayer * layer = [theView layer];
	
	[layer setShadowOffset:theOffset];
	[layer setShadowRadius:theRadius];
	[layer setShadowOpacity:theOpacity];
	[layer setShadowColor:theColor.CGColor];

其中:theView(UIView)为目标view
theOffset(CGSize)为阴影偏移量,默认为(0, -3)
theRadius(float)为阴影四角圆角半径,默认值为3
theOpacity(float)为阴影透明度(取值为[0,1])
theColor(UIColor)为阴影颜色