UItableView 所有内容保存为图片

将所有的UITableView保存为图片，因为UITableView只能保存显示当前，所以，就单个保存后，合并为一张图片

代码如下：

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01	-(IBAction)savePic:(id)sender

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{

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05	//支持retian高分辨率

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07	UIGraphicsBeginImageContextWithOptions(self.view.frame.size, YES, 0.0);

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09	float curH = mTableView.contentSize.height;

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11	UIImageView *allView = [[UIImageView alloc]initWithFrame:CGRectMake(0, 0, 320, curH)];

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13	for (float f = 0; f < curH; f+=460)

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{

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17	mTableView.contentOffset = CGPointMake(0, f);

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19	[self.view.layer renderInContext:UIGraphicsGetCurrentContext()];

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21	UIImageView *imgV = [[UIImageView alloc]initWithImage:UIGraphicsGetImageFromCurrentImageContext()];

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23	imgV.frame = CGRectMake(0, f, 320, 460);

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25	[allView addSubview:imgV];

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27	[imgV release];

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}

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31	UIGraphicsEndImageContext();

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//保存图片

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35	UIGraphicsBeginImageContextWithOptions(allView.frame.size, YES, 0.0);

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37	[allView.layer renderInContext:UIGraphicsGetCurrentContext()];

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39	UIImage *img = UIGraphicsGetImageFromCurrentImageContext();

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41	UIGraphicsEndImageContext();

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43	[allView release];

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45	[UIImagePNGRepresentation(img) writeToFile:@"/users/test/desktop/font.png" atomically:YES];

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}