Draw a shadow to One View iOS objective C

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Solution:

 Draw a shadow under a view in iOS.

Code:
- (void)drawRect:(CGRect)rect {
    CGContextRef context = UIGraphicsGetCurrentContext();
    CGContextSaveGState(context);
    CGContextSetShadow(context, CGSizeMake(-14, 20), 5);
    [self.view drawRect: rect];
    CGContextRestoreGState(context);
}

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