IOS开发-画直线

#import "ZCView.h"
#import <QuartzCore/QuartzCore.h>

@implementation ZCView

/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.

*/

- (void)drawRect:(CGRect)rect {
[self drawLine3];
}

- (void)drawLine1
{
//获取上下文
CGContextRef context = UIGraphicsGetCurrentContext();
//设置路径
CGMutablePathRef path = CGPathCreateMutable();
CGPathMoveToPoint(path, NULL, 50, 50);
CGPathAddLineToPoint(path, NULL, 200, 200);

//添加路径
CGContextAddPath(context, path);

//画上去
CGContextStrokePath(context);
}

- (void)drawLine2
{
//获取上下文
CGContextRef context = UIGraphicsGetCurrentContext();

//设置路径
CGContextMoveToPoint(context, 50, 50);
CGContextAddLineToPoint(context, 200, 200);

//画上去
CGContextStrokePath(context);
}

- (void)drawLine3
{
UIBezierPath *path = [UIBezierPath bezierPath];

[path moveToPoint:CGPointMake(50, 50)];

[path addLineToPoint:CGPointMake(200, 200)];

[path stroke];
}
@end