常用代码片段

View 特效

半边圆角

- (void)makecornerRadiusByRoundingCorners:(UIRectCorner)roundingCorners cornerRadii:(CGSize)cornerRadii
{
    UIBezierPath *maskPath = [UIBezierPath bezierPathWithRoundedRect:self.bounds byRoundingCorners:roundingCorners cornerRadii:cornerRadii];
    CAShapeLayer *maskLayer = [[CAShapeLayer alloc] init];
    maskLayer.frame = self.bounds;
    maskLayer.path = maskPath.CGPath;
    self.layer.mask = maskLayer;
}

渐变