我希望可以永久保存绘图线并从项目资源中加载已保存的绘图线...!
现在,当触摸移动事件发生时,我会获取x和y位置。我想将x和y位置保存在项目的本地资源中,但我对iOS没有经验,不知道该怎么做...!
而且从项目本地资源保存文件中加载已保存的x和y位置...!
我想要像下面这样保存绘图线:
请任何人帮帮我,非常感激...!
谢谢...!
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
if(!mouseSwiped) {
CGContextSetBlendMode(UIGraphicsGetCurrentContext(), kCGBlendModeClear);
UIGraphicsBeginImageContext(ivBack.frame.size);
[drawImage.image drawInRect:CGRectMake(0,0, self.ivBack.frame.size.width,self.ivBack.frame.size.height)];
CGContextSetLineCap(UIGraphicsGetCurrentContext(), kCGLineCapRound);
CGContextSetLineWidth(UIGraphicsGetCurrentContext(), line);
CGContextSetStrokeColorWithColor(UIGraphicsGetCurrentContext(), [pickColor CGColor]);
CGContextMoveToPoint(UIGraphicsGetCurrentContext(), lastPoint.x, lastPoint.y);
CGContextAddLineToPoint(UIGraphicsGetCurrentContext(), lastPoint.x, lastPoint.y);
CGContextStrokePath(UIGraphicsGetCurrentContext());
CGContextFlush(UIGraphicsGetCurrentContext());
NSData *dataImage=UIImagePNGRepresentation(UIGraphicsGetImageFromCurrentImageContext());
[dataImage writeToFile:[self SavedImage:(@"1.png")] atomically:YES];
drawImage.image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
}
}
如果您想存储x和y位置,可以将它们存储到数组中,然后使用writeToFile
将其保存到磁盘。这将以plist格式将数据写入磁盘。
NSMutableArray *points = ...
[points writeToFile:someFileInTheBundle atomically:YES];
您还可以将绘图存储为图像并将其写入磁盘。我编写的这个类别应该会对您的绘图代码提供帮助,它为您提供一个图像: https://github.com/kgn/BBlock/blob/master/UIImage%2BBBlock.m