十年网站开发经验 + 多家企业客户 + 靠谱的建站团队
量身定制 + 运营维护+专业推广+无忧售后,网站问题一站解决
IOS 绘制三角形的实例详解
网站设计制作、成都网站设计的关注点不是能为您做些什么网站,而是怎么做网站,有没有做好网站,给创新互联建站一个展示的机会来证明自己,这并不会花费您太多时间,或许会给您带来新的灵感和惊喜。面向用户友好,注重用户体验,一切以用户为中心。
先上效果图
上面三角形的代码
- (void)ljTestView { CGPoint piont1; piont1.x = 170; piont1.y = 100; CGPoint piont2; piont2.x = 50; piont2.y = 200; CGPoint piont3; piont3.x = 220; piont3.y = 200; ljDrawRect *_ljView = [[ljDrawRect alloc]initStartPoint:piont1 middlePoint:piont2 endPoint:piont3 color:[UIColor redColor]]; _ljView.frame = CGRectMake(0, 64, kDEVICEWIDTH, kDEVICEHEIGHT - 64); _ljView.backgroundColor = [UIColor yellowColor]; [self.view addSubview:_ljView]; }
画三角形的类
#import "ljDrawRect.h" @interface ljDrawRect () { CGPoint _startPoint; CGPoint _middlePoint; CGPoint _endPoint; UIColor *_color; } @end @implementation ljDrawRect #pragma mark - #pragma mark - method - (instancetype)initStartPoint:(CGPoint)startPoint middlePoint:(CGPoint)middlePoint endPoint:(CGPoint)endPoint color:(UIColor*)color { self = [super init]; if (self) { _startPoint = startPoint; _middlePoint = middlePoint; _endPoint = endPoint; _color = color; self.backgroundColor = [UIColor clearColor]; } return self; } - (void)drawRect:(CGRect)rect { CGContextRef context = UIGraphicsGetCurrentContext(); CGContextBeginPath(context);//标记 CGContextMoveToPoint(context, _startPoint.x, _startPoint.y); CGContextAddLineToPoint(context,_middlePoint.x, _middlePoint.y); CGContextAddLineToPoint(context,_endPoint.x, _endPoint.y); CGContextClosePath(context);//路径结束标志,不写默认封闭 [_color setFill]; //设置填充色 [_color setStroke];//边框也设置为_color,否则为默认的黑色 CGContextDrawPath(context, kCGPathFillStroke);//绘制路径path } @end
如有疑问请留言或者到本站社区交流讨论,感谢阅读,希望能帮助到大家,谢谢大家对本站的支持!