如何仅为右侧添加阴影？

Question

我正在添加这样的阴影。

vwVertical=[[UIView alloc] init];
[vwVertical setBackgroundColor:[UIColor whiteColor]];
vwVertical.translatesAutoresizingMaskIntoConstraints = NO;
vwVertical.layer.shadowColor=[UIColor colorWithRed:32/255 green:59/255 blue:90/255 alpha:1.0].CGColor;
vwVertical.layer.shadowOffset=CGSizeMake(5, 0);
vwVertical.layer.shadowOpacity=0.12;
vwVertical.layer.shadowRadius=6.5;
[vwBlock addSubview:vwVertical];

但这是添加阴影 3 面。我怎样才能添加到右侧。 请帮我。 谢谢

Answer 1

您需要做的就是在top - left - bottom 上插入视图的边界，然后使用shadow path。

vwVertical=[[UIView alloc] init];
// Create edge insets
UIEdgeInsets contentInsets = UIEdgeInsetsMake(0, 10, 0, 0);
// Create rect with inset and view's bounds
CGRect shadowPathOnlyIncludingRight = UIEdgeInsetsInsetRect(vwVertical.bounds, contentInsets);
// Apply it on the layer's shadowPath property
vwVertical.layer.shadowPath = [UIBezierPath bezierPathWithRect:shadowPathOnlyIncludingRight].CGPath;

[vwVertical setBackgroundColor:[UIColor whiteColor]];
vwVertical.translatesAutoresizingMaskIntoConstraints = NO;
vwVertical.layer.shadowColor=[UIColor colorWithRed:32/255 green:59/255 blue:90/255 alpha:1.0].CGColor;
vwVertical.layer.shadowOffset=CGSizeMake(5, 0);
vwVertical.layer.shadowOpacity=0.12;
vwVertical.layer.shadowRadius=6.5;