iOS中简单的画线功能

#import "ZBView.h"

@implementation ZBView


// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect {
    // Drawing code
    
    CGContextRef context = UIGraphicsGetCurrentContext();
//    CGContextSetLineCap(context, kCGLineCapRound);
//    CGContextSetLineWidth(context, 3);  //线宽
//    CGContextSetAllowsAntialiasing(context, true);
//    CGContextSetRGBStrokeColor(context, 70.0/255.0,   241.0/255.0,   241.0/255.0  ,    1.0);  //线的颜色
    CGContextBeginPath(context);
    
    CGContextMoveToPoint(context, 0, 0);  //起点坐标
    CGContextAddLineToPoint(context, self.frame.size.width, self.frame.size.height);   //终点坐标
    
    CGContextStrokePath(context);
    

    
    
}


@end

https://www.jianshu.com/p/0546a3b57f16

https://www.jianshu.com/p/c49833c04362