[英]Creating image with in the frame of a rectangle placed on a UIImageview
How to create a new image with specified frame in a UIView, the view contains imageviews and buttons also.I also need to get the image in the specified frame as a new image. 如何在UIView中创建具有指定框架的新图像,该视图还包含图像视图和按钮。我还需要将指定框架中的图像作为新图像获取。 I've tried this but it not correct.
我已经尝试过了,但是不正确。
I need to crop from UIView and make it as a new UIImage. 我需要从UIView裁剪并使其成为新的UIImage。
You need to import this framework in your project. 您需要在项目中导入此框架。
#import <QuartzCore/QuartzCore.h>
And use following code 并使用以下代码
[imageView.layer setBorderColor: [[UIColor blackColor] CGColor]];
[imageView.layer setBorderWidth: 2.0]; // set border width as per your requirement.
EDITED: 编辑:
Use any one which you need. 使用您需要的任何一个。
For Get Crop Image: 对于获取作物图像:
UIImage *croppedImg = nil;
CGRect cropRect = CGRectMake(AS YOu Need);
croppedImg = [self croppIngimageByImageName:self.imageView.image toRect:cropRect];
Use following method that return UIImage
( as You want size of image ) 使用以下方法返回
UIImage
( 根据需要的图像大小 )
- (UIImage *)croppIngimageByImageName:(UIImage *)imageToCrop toRect:(CGRect)rect
{
//CGRect CropRect = CGRectMake(rect.origin.x, rect.origin.y, rect.size.width, rect.size.height+15);
CGImageRef imageRef = CGImageCreateWithImageInRect([imageToCrop CGImage], rect);
UIImage *cropped = [UIImage imageWithCGImage:imageRef];
CGImageRelease(imageRef);
return cropped;
}
Here you get Croped Image that return by above method; 在这里,您将获得通过上述方法返回的裁剪图像;
OR RESIZING 或调整
And also Use following method for specific hight and width with image for Resizing UIImage : 还可以使用以下方法对图像的特定高度和宽度进行调整UIImage的大小 :
+ (UIImage*)resizeImage:(UIImage*)image withWidth:(int)width withHeight:(int)height
{
CGSize newSize = CGSizeMake(width, height);
float widthRatio = newSize.width/image.size.width;
float heightRatio = newSize.height/image.size.height;
if(widthRatio > heightRatio)
{
newSize=CGSizeMake(image.size.width*heightRatio,image.size.height*heightRatio);
}
else
{
newSize=CGSizeMake(image.size.width*widthRatio,image.size.height*widthRatio);
}
UIGraphicsBeginImageContextWithOptions(newSize, NO, 0.0);
[image drawInRect:CGRectMake(0,0,newSize.width,newSize.height)];
UIImage* newImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return newImage;
}
This method return NewImage , with specific size that you want. 此方法返回NewImage ,具有所需的特定大小。
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