这个一个方法，到时候调用
[self setBorderWithView:(需要加边框的视图) top:(BOOL)top left:(BOOL)left bottom:(BOOL)bottom right:(BOOL)right borderColor: (边框颜色) borderWidth:（边框宽度） ]；
- (void)setBorderWithView:(UIView *)view top:(BOOL)top left:(BOOL)left bottom:(BOOL)bottom right:(BOOL)right borderColor:(UIColor *)color borderWidth:(CGFloat)width
{
if (top) {
CALayer *layer = [CALayer layer];
layer.frame = CGRectMake(0, 0, view.frame.size.width, width);
layer.backgroundColor = color.CGColor;
[view.layer addSublayer:layer];
}
if (left) {
CALayer *layer = [CALayer layer];
layer.frame = CGRectMake(0, 0, width, view.frame.size.height);
layer.backgroundColor = color.CGColor;
[view.layer addSublayer:layer];
}
if (bottom) {
CALayer *layer = [CALayer layer];
layer.frame = CGRectMake(0, view.frame.size.height - width, view.frame.size.width, width);
layer.backgroundColor = color.CGColor;
[view.layer addSublayer:layer];
}
if (right) {
CALayer *layer = [CALayer layer];
layer.frame = CGRectMake(view.frame.size.width - width, 0, width, view.frame.size.height);
layer.backgroundColor = color.CGColor;
[view.layer addSublayer:layer];
}
}
非常简单！！
