标签：share hiera 阅读 make on() uiimage user for wim
2017.03.16 12:18* 字数 52 阅读 563评论 4喜欢 2
1. 截取屏幕尺寸大小的图片并保存至相册
保存至相册只需将方法saveImage中的代码替换即可
UIGraphicsBeginImageContextWithOptions(self.view.bounds.size, YES, 0.0);
[self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
2. scrollView或tableView的全部截屏并保存至相册
- (void)saveImage {
UIImage* viewImage = nil;
UITableView *scrollView = self.tableView;
UIGraphicsBeginImageContextWithOptions(scrollView.contentSize, scrollView.opaque, 0.0);
{
CGPoint savedContentOffset = scrollView.contentOffset;
CGRect savedFrame = scrollView.frame;
scrollView.contentOffset = CGPointZero;
scrollView.frame = CGRectMake(0, 0, scrollView.contentSize.width, scrollView.contentSize.height);
[scrollView.layer renderInContext: UIGraphicsGetCurrentContext()];
viewImage = UIGraphicsGetImageFromCurrentImageContext();
scrollView.contentOffset = savedContentOffset;
scrollView.frame = savedFrame;
}
UIGraphicsEndImageContext();
[self saveImageToPhotos:viewImage];
}
- (void)saveImageToPhotos:(UIImage*)savedImage {
UIImageWriteToSavedPhotosAlbum(savedImage, self, @selector(image:didFinishSavingWithError:contextInfo:), NULL);
}
- (void)image: (UIImage *) image didFinishSavingWithError: (NSError *) error contextInfo: (void *) contextInfo {
NSString *msg = nil ;
if(error != NULL){
msg = @"保存图片失败" ;
}else{
msg = @"保存图片成功" ;
}
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"保存图片结果提示"
message:msg
delegate:self
cancelButtonTitle:@"确定"
otherButtonTitles:nil];
[alert show];
}
+ (UIImage *)screenshot
{
CGSize imageSize = CGSizeZero;
UIInterfaceOrientation orientation = [UIApplication sharedApplication].statusBarOrientation;
if (UIInterfaceOrientationIsPortrait(orientation)) {
imageSize = [UIScreen mainScreen].bounds.size;
} else {
imageSize = CGSizeMake([UIScreen mainScreen].bounds.size.height, [UIScreen mainScreen].bounds.size.width);
}
UIGraphicsBeginImageContextWithOptions(imageSize, NO, 0);
CGContextRef context = UIGraphicsGetCurrentContext();
for (UIWindow *window in [[UIApplication sharedApplication] windows]) {
CGContextSaveGState(context);
CGContextTranslateCTM(context, window.center.x, window.center.y);
CGContextConcatCTM(context, window.transform);
CGContextTranslateCTM(context, -window.bounds.size.width * window.layer.anchorPoint.x, -window.bounds.size.height * window.layer.anchorPoint.y);
if (orientation == UIInterfaceOrientationLandscapeLeft) {
CGContextRotateCTM(context, M_PI_2);
CGContextTranslateCTM(context, 0, -imageSize.width);
} else if (orientation == UIInterfaceOrientationLandscapeRight) {
CGContextRotateCTM(context, -M_PI_2);
CGContextTranslateCTM(context, -imageSize.height, 0);
} else if (orientation == UIInterfaceOrientationPortraitUpsideDown) {
CGContextRotateCTM(context, M_PI);
CGContextTranslateCTM(context, -imageSize.width, -imageSize.height);
}
if ([window respondsToSelector:@selector(drawViewHierarchyInRect:afterScreenUpdates:)]) {
[window drawViewHierarchyInRect:window.bounds afterScreenUpdates:YES];
} else {
[window.layer renderInContext:context];
}
CGContextRestoreGState(context);
}
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image;
}
class func screenshot() -> UIImage {
var imageSize = CGSizeZero
let orientation = UIApplication.sharedApplication().statusBarOrientation
if UIInterfaceOrientationIsPortrait(orientation) {
imageSize = UIScreen.mainScreen().bounds.size
} else {
imageSize = CGSize(width: UIScreen.mainScreen().bounds.size.height, height: UIScreen.mainScreen().bounds.size.width)
}
UIGraphicsBeginImageContextWithOptions(imageSize, false, 0)
let context = UIGraphicsGetCurrentContext()
for window in UIApplication.sharedApplication().windows {
CGContextSaveGState(context)
CGContextTranslateCTM(context, window.center.x, window.center.y)
CGContextConcatCTM(context, window.transform)
CGContextTranslateCTM(context, -window.bounds.size.width * window.layer.anchorPoint.x, -window.bounds.size.height * window.layer.anchorPoint.y)
if orientation == .LandscapeLeft {
CGContextRotateCTM(context, CGFloat(M_PI_2))
CGContextTranslateCTM(context, 0, -imageSize.width)
} else if orientation == .LandscapeRight {
CGContextRotateCTM(context, -CGFloat(M_PI_2))
CGContextTranslateCTM(context, -imageSize.height, 0)
} else if orientation == .PortraitUpsideDown {
CGContextRotateCTM(context, CGFloat(M_PI))
CGContextTranslateCTM(context, -imageSize.width, -imageSize.height)
}
if window.respondsToSelector("drawViewHierarchyInRect:afterScreenUpdates:") {
window.drawViewHierarchyInRect(window.bounds, afterScreenUpdates: true)
} else if let context = context {
window.layer.renderInContext(context)
}
CGContextRestoreGState(context)
}
let image = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return image
}2016.06.17
第一种方法（截全屏幕）
下面这段代码可以将当前屏幕显示的内容截图放置相册中，需要导入
-(void)viewDidAppear:(BOOL)animated
{
[superviewDidAppear:animated];
self.view.backgroundColor= [UIColorgreenColor];
UIWindow*screenWindow = [[UIApplicationsharedApplication]keyWindow];
UIGraphicsBeginImageContext(screenWindow.frame.size);
[screenWindow.layerrenderInContext:UIGraphicsGetCurrentContext()];
UIImage* viewImage =UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
UIImageWriteToSavedPhotosAlbum(viewImage,nil,nil,nil);
}
第二种方法（自定义截图区域）
#pragmamark -=====自定义截屏位置大小的逻辑代码=====-
staticintScreenshotIndex=0; //
-(void)ScreenShot{
//这里因为我需要全屏接图所以直接改了，宏定义iPadWithd为1024，iPadHeight为768，
//UIGraphicsBeginImageContextWithOptions(CGSizeMake(640, 960), YES, 0);//设置截屏大小
UIGraphicsBeginImageContextWithOptions(CGSizeMake(iPadWidth, iPadHeight), YES,0);//设置截屏大小
[[self.view layer] renderInContext:UIGraphicsGetCurrentContext()];
UIImage *viewImage =UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
CGImageRef imageRef =viewImage.CGImage;
//CGRect rect = CGRectMake(166, 211, 426, 320);//这里可以设置想要截图的区域
CGRect rect = CGRectMake(0,0, iPadWidth, iPadHeight);//这里可以设置想要截图的区域
CGImageRef imageRefRect =CGImageCreateWithImageInRect(imageRef, rect);
UIImage *sendImage =[[UIImage alloc] initWithCGImage:imageRefRect];
UIImageWriteToSavedPhotosAlbum(sendImage, nil, nil, nil);//保存图片到照片库
NSData *imageViewData =UIImagePNGRepresentation(sendImage);
NSArray *paths =NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *pictureName= [NSString stringWithFormat:@"screenShow_%d.png",ScreenshotIndex];
NSString *savedImagePath =[documentsDirectory stringByAppendingPathComponent:pictureName];
NSLog(@"截屏路径打印: %@", savedImagePath);
//这里我将路径设置为一个全局String，这里做的不好，我自己是为了用而已，希望大家别这么写
[self SetPickPath:savedImagePath];
[imageViewData writeToFile:savedImagePath atomically:YES];//保存照片到沙盒目录
CGImageRelease(imageRefRect);
ScreenshotIndex++;
}
//设置路径
- (void)SetPickPath:(NSString *)PickImage {
_ScreenshotsPickPath =PickImage;
}
//获取路径<这里我就直接用于邮件推送的代码中去了，能达到效果，但肯定有更好的写法>
- (NSString *)GetPickPath {
return_ScreenshotsPickPath;
}
-(void) screenShot{
UIGraphicsBeginImageContext(self.bounds.size); //self为需要截屏的UI控件 即通过改变此参数可以截取特定的UI控件
[self.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *image= UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
NSLog(@"image:%@",image); //至此已拿到image
UIImageView *imaView = [[UIImageView alloc] initWithImage:image];
imaView.frame = CGRectMake(0, 700, 500, 500);
[self addSubview:imaView];
UIImageWriteToSavedPhotosAlbum(image, self, nil, nil);//把图片保存在本地
}
iOS中的截屏（屏幕截屏及scrollView或tableView的全部截屏）
标签：share hiera 阅读 make on() uiimage user for wim
原文地址：https://www.cnblogs.com/sundaysgarden/p/10335186.html
