.m内容
#import "UIView+BorderLine.h"
@implementation UIView (BorderLine)
- (UIView *)borderForColor:(UIColor *)color borderWidth:(CGFloat)borderWidth borderType:(UIBorderSideType)borderType {
if (borderType == UIBorderSideTypeAll) {
self.layer.borderWidth = borderWidth;
self.layer.borderColor = color.CGColor;
return self;
}
/// 左侧
if (borderType & UIBorderSideTypeLeft) {
/// 左侧线路径
[self.layer addSublayer:[self addLineOriginPoint:CGPointMake(0.f, 0.f) toPoint:CGPointMake(0.0f, self.frame.size.height) color:color borderWidth:borderWidth]];
}
/// 右侧
if (borderType & UIBorderSideTypeRight) {
/// 右侧线路径
[self.layer addSublayer:[self addLineOriginPoint:CGPointMake(self.frame.size.width, 0.0f) toPoint:CGPointMake( self.frame.size.width, self.frame.size.height) color:color borderWidth:borderWidth]];
}
/// top
if (borderType & UIBorderSideTypeTop) {
/// top线路径
[self.layer addSublayer:[self addLineOriginPoint:CGPointMake(0.0f, 0.0f) toPoint:CGPointMake(self.frame.size.width, 0.0f) color:color borderWidth:borderWidth]];
}
/// bottom
if (borderType & UIBorderSideTypeBottom) {
/// bottom线路径
[self.layer addSublayer:[self addLineOriginPoint:CGPointMake(0.0f, self.frame.size.height) toPoint:CGPointMake( self.frame.size.width, self.frame.size.height) color:color borderWidth:borderWidth]];
}
return self;
}
- (CAShapeLayer *)addLineOriginPoint:(CGPoint)p0 toPoint:(CGPoint)p1 color:(UIColor *)color borderWidth:(CGFloat)borderWidth {
/// 线的路径
UIBezierPath * bezierPath = [UIBezierPath bezierPath];
[bezierPath moveToPoint:p0];
[bezierPath addLineToPoint:p1];
CAShapeLayer * shapeLayer = [CAShapeLayer layer];
shapeLayer.strokeColor = color.CGColor;
shapeLayer.fillColor = [UIColor clearColor].CGColor;
/// 添加路径
shapeLayer.path = bezierPath.CGPath;
/// 线宽度
shapeLayer.lineWidth = borderWidth;
return shapeLayer;
}
@end
用法：
UIView *testView = [[UIView alloc] initWithFrame:CGRectMake(80.0f, 80.0f, 200.0f, 100.0f)];
testView.backgroundColor = [UIColor lightGrayColor];
[self.view addSubview:testView];
[self borderForView:testView color:[UIColor redColor] borderWidth:1.0f borderType:UIBorderSideTypeTop | UIBorderSideTypeBottom];
效果：
不足之处,边框线过宽的话，交界处会有留白；
ps:注意：需要先把你的view加载在父view上，[self.view addSubview:testView]; 之后再设置边框；否则可能会不起作用的；
总结
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