如何保存我在CGContext中绘制的内容 [英] How Do I Save What I have Drawn In A CGContext

问题描述

我绘制了一个UIView的CGContext。

I have drawn into a CGContext of a UIView.

- (void)drawRect:(CGRect)rect { 
    [self drawInContext:UIGraphicsGetCurrentContext()]  
}

我已绘制到一个png文件。

I would like to save what I have drawn to a png file.

有简单的解决方案吗？

- 这是我到目前为止....

Based on suggestions below - here's what I have so far....

-(void)createImage {
    NSString* outFile = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/image.png"];
    DLog(@"creating image file at %@", outFile);
    UIImage *image = UIGraphicsGetImageFromCurrentImageContext(); 
    NSData *imageData = UIImagePNGRepresentation(image);
    [imageData writeToFile:outFile 
                atomically:NO];
}

- (void)drawRect:(CGRect)rect { 
    [self drawInContext:UIGraphicsGetCurrentContext()]; 
    [self createImage];
}

推荐答案

UIImage *image = UIGraphicsGetImageFromCurrentImageContext(); 
NSData *imageData = UIImagePNGRepresentation(image);
[imageData writeToFile:@"image.png"];

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