設置UIImage的邊框和圓角大小以及顏色

#import <QuartzCore/QuartzCore.h>

//設置圓角邊框
retweetedView.layer.cornerRadius = 8;
retweetedView.layer.masksToBounds = YES;
//設置邊框及邊框顏色
retweetedView.layer.borderWidth = 2;
retweetedView.layer.borderColor =[ [UIColor grayColor] CGColor];