如何在ios应用程序中合并两个半图像? [英] How to merge two half images in ios app?

问题描述

我制作了一个相机应用程序，在该应用程序中，我单击一个图像并将其切成两半，然后单击另一个图像并将其剪下另一半.
然后将这两个图像合并我已经成功完成了这项任务，但问题是合并不顺利.

i have made a camera app in which i click an image and cut it in half, then i click an other image and cut other half from it.
Then these two images are merged i have accomplished this task successfully but the problem is the merging is not smooth.

两半之间有明显的分离......我想知道如何平滑它?

There is a clear separation between two halves....I want to know how to smooth it up?

//------merging the two images------
- (UIImage*)mergeImage:(UIImage*)first withImage:(UIImage*)second
{
    // get size of the first image
    CGImageRef firstImageRef = first.CGImage;
    CGFloat firstWidth = CGImageGetWidth(firstImageRef);
    CGFloat firstHeight = CGImageGetHeight(firstImageRef);
    
    // get size of the second image
    CGImageRef secondImageRef = second.CGImage;
    CGFloat secondWidth = CGImageGetWidth(secondImageRef);
    CGFloat secondHeight = CGImageGetHeight(secondImageRef);
    
    // build merged size
    CGSize mergedSize = CGSizeMake((firstWidth+secondWidth), MAX(firstHeight, secondHeight));
    
    // capture image context ref
    UIGraphicsBeginImageContext(mergedSize);
    
    //Draw images onto the context
    [first drawInRect:CGRectMake(0, 0, firstWidth, firstHeight)];
    //[second drawInRect:CGRectMake(firstWidth, 0, secondWidth, secondHeight)];
    [second drawInRect:CGRectMake(firstWidth, 0, secondWidth, secondHeight) blendMode:kCGBlendModeNormal alpha:1.0];
    
    // assign context to new UIImage
    UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
    
    // end context
    UIGraphicsEndImageContext();
    
    return newImage;
   
}

谢谢

(我接受downvote作为健康的批评，但请gv rsn以便我可以改进)

(i accept downvote as healthy criticism but pls gv rsn so that i can improve)

推荐答案

如果我没有错，那么你想要这个.

if i m not wrong then you want this.

UIImageView *imgView1, *imgView2, *imgView3;
imgView1 = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"image1"]];
imgView2 = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"image2"]];
imgView3 = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"image3"]];
imgView1.frame = CGRectMake(0, 0, 50, 50);
imgView2.frame = CGRectMake(50, 50, 100, 100);
imgView3.frame = CGRectMake(100, 100, 200, 200);
[referenceView addSubview:imgView1];
[referenceView addSubview:imgView2];
[referenceView addSubview:imgView3];
UIGraphicsBeginImageContext(referenceView.bounds.size);
[referenceView.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *finalImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
resultView = [[UIImageView alloc] initWithImage:finalImage];
resultView.frame = CGRectMake(0, 0, 320, 480);
[self.view addSubview:resultView];
referenceView.hidden = YES;

这篇关于如何在ios应用程序中合并两个半图像?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！