iOS界面淡进淡出的效果

- (void) showView

{

CGContextRef context =
UIGraphicsGetCurrentContext();

[UIView
beginAnimations:nil
context:context];

[UIView
setAnimationCurve:UIViewAnimationCurveEaseInOut];

[UIView
setAnimationDuration:3.0];

[[self.viewmy
viewWithTag:0]
setAlpha:0.0f];//淡出

// [[self.viewmy viewWithTag:0] setAlpha:1.0f];//淡进

[UIView
commitAnimations];

}

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