UIImageView实现触摸绘图

【文件属性】：
文件名称：UIImageView实现触摸绘图
文件大小：41KB
文件格式：ZIP
更新时间：2015-08-09 16:36:50
UIView绘图 触摸绘图 核心代码，使用UIImageView实现触摸绘图， 比起使用数组实现要强很多， 使用数组会很费内存，高手请过。minixx新手学习资料保存 //监听触摸事件 -(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event{ UITouch *touch = [touches anyObject]; currentPoint = [touch locationInView:self]; NSLog(@"currentPoint.x = %f",currentPoint.x); NSLog(@"currentPoint.y = %f",currentPoint.y); UIGraphicsBeginImageContext(self.frame.size); [drawImage.image drawInRect:CGRectMake(0, 0, drawImage.frame.size.width, drawImage.frame.size.height)]; CGContextSetLineCap(UIGraphicsGetCurrentContext(), kCGLineCapRound); CGContextSetLineWidth(UIGraphicsGetCurrentContext(), 5.0);//设置宽度 CGContextSetRGBStrokeColor(UIGraphicsGetCurrentContext(), 0.0, 0.0, 0.0, 1.0);//设置颜色 CGContextBeginPath(UIGraphicsGetCurrentContext());//开始路径 CGContextMoveToPoint(UIGraphicsGetCurrentContext(), lastPoint.x, lastPoint.y);//起始点坐标 CGContextAddLineToPoint(UIGraphicsGetCurrentContext(),currentPoint.x, currentPoint.y);//终点坐标 CGContextStrokePath(UIGraphicsGetCurrentContext());//开始绘制 //将画好得生成image保存在原图片／／／／／／／／／／ drawImage.image = UIGraphicsGetImageFromCurrentImageContext();//把图形上下文 UIGraphicsEndImageContext(); lastPoint = currentPoint; // [self setNeedsDisplay]; } -(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{ }

【文件预览】：
TestPaint
----.DS_Store(6KB)
----TestPaint()
--------main.m(344B)
--------TestPaint-Prefix.pch(321B)
--------AppDelegate.h(372B)
--------AppDelegate.m(2KB)
--------TestPaint-Info.plist(1KB)
--------PaintView.h(341B)
--------PaintView.m(2KB)
--------ViewController.h(223B)
--------ViewController.m(840B)
--------en.lproj()
----TestPaint.xcodeproj()
--------project.xcworkspace()
--------project.pbxproj(12KB)
--------xcuserdata()