一个圆: view.typeImageView.layer.cornerRadius = view.frame.size.width/2.0;
view.typeImageView.clipsToBounds = YES;
边框颜色: view.layer.borderWidth=1.0f;
view.layer.borderColor=[UIColor colorWithRed:0xbf/255.0f green:0xbf/255.0f blue:0xbf/255.0f alpha:1].CGColor;
注意:view若是xib中拖出来的控件,设置的时候在ib里面记得选择无边框的,要不然随便你设置,都是无效的。
阴影:

view.layer.shadowOffset = CGSizeMake(0, 3);
view.layer.shadowColor = [UIColor blackColor].CGColor;
view.layer.shadowOpacity = 0.2;
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