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引言
需求：绘制矩形和虚线
- 绘制文字
/*写文字*/
CGContextSetRGBFillColor (context, 1, 0, 0, 1.0);//设置填充颜色
[@"图片：" drawInRect:CGRectMake(10, 340+180, 80, 20) withAttributes:self.stringAttributes];
/**
文字样式
*/
- (NSMutableDictionary*)getstringAttributes4Text{
UIFont *font = [UIFont boldSystemFontOfSize:15.0];//设置
NSMutableDictionary *stringAttributes = [NSMutableDictionary dictionary];
[stringAttributes setObject:font forKey: NSFontAttributeName];
return stringAttributes;
}
I 基础形状
1.1 矩形
案例： 画矩形图形，并旋转90度
- (UIView *)leftstartV{
if (nil == _leftstartV) {
UIView *tmpView = [[UIView alloc]init];
_leftstartV = tmpView;
tmpView.layer.borderColor = [UIColor colorWithRed:254/255.0 green:192/255.0 blue:2/255.0 alpha:1.0].CGColor;
tmpView.layer.borderWidth = 1;
[self addSubview:tmpView];
CGFloat angle = M_PI_4;
[tmpView setTransform:CGAffineTransformMakeRotation(angle)];
//
// ————————————————
// 版权声明：本文为CSDN博主「iOS逆向」的原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接及本声明。
// 原文链接：https://blog.csdn.net/z929118967/article/details/73822163
__weak __typeof__(self) weakSelf = self;
[tmpView mas_makeConstraints:^(MASConstraintMaker *make) {
make.right.equalTo(weakSelf.titleLab.mas_left).offset(kAdjustRatio(-7));
make.centerY.equalTo(weakSelf.titleLab);
make.size.mas_equalTo(CGSizeMake(kAdjustRatio(11.3), kAdjustRatio(11.3)));
}];
}
return _leftstartV;
}
1.2 画线
用法
- (void)layoutSubviews{
[super layoutSubviews];
[self bringSubviewToFront:self.linView];
[self.linView layoutIfNeeded];
[CRMLineTool drawLineOfDashByCAShapeLayer:self.linView lineLength:(kAdjustRatio(3)) lineSpacing:kAdjustRatio(3) lineColor:k_tableView_Line lineDirection:YES];
}
通过 CAShapeLayer 方式绘制虚线
/**
* 通过 CAShapeLayer 方式绘制虚线
*
* param lineView: 需要绘制成虚线的view
* param lineLength: 虚线的宽度
* param lineSpacing: 虚线的间距
* param lineColor: 虚线的颜色
* param lineDirection 虚线的方向 YES 为水平方向， NO 为垂直方向
**/
+ (void)drawLineOfDashByCAShapeLayer:(UIView *)lineView lineLength:(int)lineLength lineSpacing:(int)lineSpacing lineColor:(UIColor *)lineColor lineDirection:(BOOL)isHorizonal {
CAShapeLayer *shapeLayer = [CAShapeLayer layer];
[shapeLayer setBounds:lineView.bounds];
if (isHorizonal) {
[shapeLayer setPosition:CGPointMake(CGRectGetWidth(lineView.frame) / 2, CGRectGetHeight(lineView.frame))];
} else{
[shapeLayer setPosition:CGPointMake(CGRectGetWidth(lineView.frame) / 2, CGRectGetHeight(lineView.frame)/2)];
}
[shapeLayer setFillColor:[UIColor clearColor].CGColor];
// 设置虚线颜色为blackColor
[shapeLayer setStrokeColor:lineColor.CGColor];
// 设置虚线宽度
if (isHorizonal) {
[shapeLayer setLineWidth:CGRectGetHeight(lineView.frame)];
} else {
[shapeLayer setLineWidth:CGRectGetWidth(lineView.frame)];
}
[shapeLayer setLineJoin:kCALineJoinRound];
// 设置线宽，线间距
[shapeLayer setLineDashPattern:[NSArray arrayWithObjects:[NSNumber numberWithInt:lineLength], [NSNumber numberWithInt:lineSpacing], nil]];
// 设置路径
CGMutablePathRef path = CGPathCreateMutable();
CGPathMoveToPoint(path, NULL, 0, 0);
if (isHorizonal) {
CGPathAddLineToPoint(path, NULL,CGRectGetWidth(lineView.frame), 0);
} else {
CGPathAddLineToPoint(path, NULL, 0, CGRectGetHeight(lineView.frame));
}
[shapeLayer setPath:path];
CGPathRelease(path);
// 把绘制好的虚线添加上来
[lineView.layer addSublayer:shapeLayer];
}
初始化视图
- (UIView *)linView{
if (nil == _linView) {
UIView *tmpView = [[UIView alloc]init];
_linView = tmpView;
tmpView.backgroundColor = UIColor.whiteColor;
// [_linView setBackgroundColor:k_tableView_Line];
[self addSubview:tmpView];
__weak __typeof__(self) weakSelf = self;
[tmpView mas_makeConstraints:^(MASConstraintMaker *make) {
make.height.mas_equalTo(LineH);
// make.top.equalTo(weakSelf.rightLable.mas_bottom3).offset(kAdjustRatio(20));
make.bottom.offset(kAdjustRatio(-1));
make.left.equalTo(weakSelf).offset(kAdjustRatio(kSideMargin));
make.right.equalTo(weakSelf).offset(kAdjustRatio(-kSideMargin));
}];
}
return _linView;
}
1.3 画三角形
- (void)setup_Draw3Points:(CGContextRef )context{
CGFloat PointsY = 230;
[@"画三角形：" drawInRect:CGRectMake(10, PointsY, 80, 20) withAttributes:self.stringAttributes];
//只要三个点就行跟画一条线方式一样，把三点连接起来
CGPoint sPoints[3];//坐标点
sPoints[0] =CGPointMake(100, PointsY);//坐标1
sPoints[1] =CGPointMake(140, PointsY);//坐标2
sPoints[2] =CGPointMake(140, 190);//坐标3
CGContextAddLines(context, sPoints, 3);//添加线
CGContextClosePath(context);//封起来
CGContextDrawPath(context, kCGPathFillStroke); //根据坐标绘制路径
}
II、圆角矩形
#pragma mark - ******** 画圆角矩形
- (void)setup_Arc:(CGContextRef )context{
CGFloat Curvey = 260+70;
[@"画圆角矩形：" drawInRect:CGRectMake(10, Curvey, 100, 20) withAttributes:self.stringAttributes];
float fw = 180;
float fh = 280+30;
CGContextMoveToPoint(context, fw, fh-20); // 开始坐标右边开始
CGContextAddArcToPoint(context, fw, fh, fw-20, fh, 10); // 右下角角度
CGContextAddArcToPoint(context, 120, fh, 120, fh-20, 10); // 左下角角度
CGContextAddArcToPoint(context, 120, 250, fw-20, 250, 10); // 左上角
CGContextAddArcToPoint(context, fw, 250, fw, fh-20, 10); // 右上角
CGContextClosePath(context);
CGContextDrawPath(context, kCGPathFillStroke); //根据坐标绘制路径
}
III、 扇形和椭圆
#pragma mark - ******** 扇形和椭圆
- (void)setup_DrawEllipse:(CGContextRef )context{
CGFloat EllipseY = 160+5;
[@"画扇形和椭圆：" drawInRect:CGRectMake(10, EllipseY, 110, 20) withAttributes:self.stringAttributes];
//1、画扇形，也就画圆，只不过是设置角度的大小，形成一个扇形
UIColor* aColor = [UIColor colorWithRed:0 green:1 blue:1 alpha:1];
CGContextSetFillColorWithColor(context, aColor.CGColor);//填充颜色
//以10为半径围绕圆心画指定角度扇形
CGContextMoveToPoint(context, 160, 180);
CGContextAddArc(context, 160, 185, 30, -60 * M_PI / 180, -120 * M_PI / 180, 1);
CGContextClosePath(context);
CGContextDrawPath(context, kCGPathFillStroke); //绘制路径
//2、画椭圆
CGContextAddEllipseInRect(context, CGRectMake(160, 180, 20, 8));
CGContextDrawPath(context, kCGPathFillStroke);
}
see also
demo
github.com/zhangkn/iOS…
可关注公众号：【iOS逆向】，回复消息6 获取demo源码
