方法一：

-(UIImage?*)clipImageFromImage:(UIImage?*)orgImage? Rect:(CGRect)clipRect{

? ??CGImageRef?imageRef = orgImage.CGImage;

? ??CGImageRef?subImageRef =?CGImageCreateWithImageInRect(imageRef, clipRect);

? ??CGSize?size;

? ? size = clipRect.size;

? ??UIGraphicsBeginImageContext(size);

? ??CGContextRef?context =?UIGraphicsGetCurrentContext();

? ??CGContextDrawImage(context, clipRect, subImageRef);

? ??UIImage* clipImage = [UIImage?imageWithCGImage:subImageRef];

? ??CGImageRelease(subImageRef);

? ??UIGraphicsEndImageContext();

? ??return?clipImage;

}

方法二：

self.view.frame = CGRectMake(0, 0, 68, 53);//設(shè)置圖片的大小

UIImageView *bgImg = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 68, 53)];//設(shè)置圖片的背景圖片

bgImg.image = [UIImage imageNamed:@"1.png"];

[self.view addSubview:bgImg];

[bgImg release];

if(lab == nil)

lab = [[UILabel alloc] initWithFrame:CGRectMake(0, 20, 68, 30)];//設(shè)置圖片上面的文字顯示

lab.textAlignment = UITextAlignmentCenter;

lab.textColor = [UIColor blackColor];

lab.backgroundColor = [UIColor clearColor];

lab.text = [[titleArray objectAtIndex:i] objectAtIndex:0];

[self.view addSubview:lab];

UIGraphicsBeginImageContext(self.view.bounds.size);

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

UIImage *aImage = UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();

NSData *imageData = UIImagePNGRepresentation(aImage);

UIImage *img = [UIImage imageWithData:imageData];//生成的圖片

方法三：

+ (UIImage *)captureWithView:(UIView *)view {// 1.開始上下文UIGraphicsBeginImageContextWithOptions(view.frame.size, NO, 0.0);// 2.將view的layer渲染到上下文[view.layer renderInContext:UIGraphicsGetCurrentContext()];// 3.取出圖片UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();// 4.結(jié)束上下文UIGraphicsEndImageContext();return newImage; }方法四：（生產(chǎn)圖片并保存到相冊）

UIImage*?layerImage?=?nil;??

CGSize?layerSize?=?self.contentScrollView.frame.size;??

??

UIGraphicsBeginImageContextWithOptions(layerSize,?NO,?2.0);??

[self.contentScrollView.layer?renderInContext:UIGraphicsGetCurrentContext()];??

layerImage?=?UIGraphicsGetImageFromCurrentImageContext();??

UIGraphicsEndImageContext();??

UIImageWriteToSavedPhotosAlbum(layerImage,?nil,?nil,?nil);?

方法五（圖片處理）

//將image1拼接到image2上

- (UIImage?*)addImage:(UIImage?*)image1 toImage:(UIImage?*)image2

{

? ??@autoreleasepool?{

? ? ? ??CGSize?size;

? ? ? ??if?(image1.size.width?> image2.size.width) {

? ? ? ? ? ? size =?CGSizeMake(image1.size.width, image1.size.height+image2.size.height);

? ? ? ? }?else?{

? ? ? ? ? ? size =?CGSizeMake(image2.size.width, image1.size.height+image2.size.height);

? ? ? ? }

? ? ? ??UIGraphicsBeginImageContext(size);

? ? ? ??// Draw image1

? ? ? ? [image1?drawInRect:CGRectMake(image1.size.width?> image2.size.width?0:(image2.size.width-image1.size.width)/2, image2.size.height, image1.size.width, image1.size.height)];

? ? ? ??// Draw image2

? ? ? ? [image2?drawInRect:CGRectMake(image1.size.width?> image2.size.width?(image1.size.width-image2.size.width)/2:0,?0, image2.size.width, image2.size.height)];

? ? ? ??UIImage?*resultingImage =?UIGraphicsGetImageFromCurrentImageContext();

? ? ? ??UIGraphicsEndImageContext();

? ? ? ??return?resultingImage;

? ? }

}

//圖片縮放

- (UIImage?*)convertImage:(UIImage?*)origImage scope:(CGFloat)scope

{

? ??UIImage?*image =?nil;

? ??CGSize?size = origImage.size;

? ??if?(size.width?<= scope && size.height?<= scope) {

? ? ? ??// do nothing

? ? ? ? image = origImage;

? ? }?else?{

? ? ? ??CGFloat?length = size.width;

? ? ? ??if?(size.width?< size.height) {

? ? ? ? ? ? length = size.width;

? ? ? ? }

? ? ? ??CGFloat?f = scope/length;

? ? ? ??CGSize?newSize =?CGSizeMake(size.width*f, size.height*f);

? ? ? ??//

? ? ? ??UIGraphicsBeginImageContext(newSize);

? ? ? ??// Tell the old image to draw in this new context, with the desired

? ? ? ??// new size

? ? ? ? [origImage?drawInRect:CGRectMake(0,?0, newSize.width, newSize.height)];

? ? ? ??// Get the new image from the context

? ? ? ? image =?UIGraphicsGetImageFromCurrentImageContext();

? ? ? ??UIGraphicsEndImageContext();

? ? }

? ??return?image;

}

//將webView上面的內(nèi)容轉(zhuǎn)化為圖片

- (UIImage *)webContentImage{

CGSize boundsSize = web.bounds.size;

CGFloat boundsWidth = web.bounds.size.width;

CGFloat boundsHeight = web.bounds.size.height;

CGPoint offset = web.scrollView.contentOffset;

[web.scrollView setContentOffset:CGPointMake(0, 0)];

CGFloat contentHeight = web.scrollView.contentSize.height;

NSMutableArray *images = [NSMutableArray array];

while (contentHeight > 0) {

UIGraphicsBeginImageContext(boundsSize);

視圖生產(chǎn)界面，圖片拼接，縮放處理

[web.layer renderInContext:UIGraphicsGetCurrentContext()];

UIImage *image = UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();

[images addObject:image];

CGFloat offsetY = web.scrollView.contentOffset.y;

[web.scrollView setContentOffset:CGPointMake(0, offsetY + boundsHeight)];

contentHeight -= boundsHeight;

}

[web.scrollView setContentOffset:offset];

UIGraphicsBeginImageContext(web.scrollView.contentSize);

[images enumerateObjectsUsingBlock:^(UIImage *image, NSUInteger idx, BOOL *stop) {

[image drawInRect:CGRectMake(0, boundsHeight * idx, boundsWidth, boundsHeight)];

}];

UIImage *fullImage = UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();

return fullImage;

}

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