2

我需要在一个视图中显示两个图像。到目前为止，我只显示了一个图像，但是如何在一个视图中显示两个图像？在 iPhone 上可以吗？如果是这样，你能指导我怎么做吗？

注意：我需要同时显示两个图像。

4

6 回答 6

6

如果要重叠 2 个图像，请粘贴此代码，

        UIImage *a = [ your 1st iamge];
        UIImage *b = [ your 2nd iamge];
        UIGraphicsBeginImageContext(a.size);
        [a drawInRect:CGRectMake(0, 0, a.size.width, a.size.height)];
        [b drawInRect:CGRectMake(a.size.width - b.size.width, a.size.height - b.size.height, b.size.width, b.size.height)];
        UIImage *result = UIGraphicsGetImageFromCurrentImageContext();
        UIGraphicsEndImageContext();

        [YourImageView setImage:result];
于 2013-02-05T08:09:08.757 回答
4 
UIImageView *imgView1 = [[UIImageView alloc] initWithFrame:CGRectMake(10, 10, 100, 50)];
UIImageView *imgView2 = [[UIImageView alloc] initWithFrame:CGRectMake(110, 110, 100, 50)];
imgView1.image = [UIImage imageNamed:@"image1.png"];
imgView2.image = [UIImage imageNamed:@"image2.png"];
[self.view addSubview:imgView1];
[self.view addSubview:imgView2];
于 2013-02-04T09:43:20.193 回答
2

您可以使用 - 2 个实例UIImageView，并根据需要对它们进行布局；- 或子类化并通过覆盖UIView绘制 2秒UIImagedrawInRect:

于 2013-02-04T09:33:22.563 回答
2 
- (void)displayImages
{
    UIImageView *firstImage = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"yourimage"]];
    firstImage.frame = CGRectMake(0, 0, 100, 100);
    UIImageView *secondImage = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"yourimage"]];
    secondImage.frame = CGRectMake(100, 0, 100, 100);
    [self.view addSubview:firstImage];
    [self.view addSubview:secondImage];
}
于 2013-02-04T09:38:36.183 回答
1

您可以通过UIImageViews在视图中添加两个来做到这一点。

如果您已经在显示一个UIImageView，那么只需添加另一个并将第二个图像放入该图像中。

于 2013-02-04T09:30:03.727 回答
1

使用以下代码合并两个图像

#import <UIKit/UIKit.h>

@interface UIImage (MyImage)


+ (UIImage*)imageFromView:(UIView*)view;
+ (UIImage*)imageFromView:(UIView*)view scaledToSize:(CGSize)newSize;
+ (UIImage*)imageWithImage:(UIImage*)image scaledToSize:(CGSize)newSize;
+ (void)beginImageContextWithSize:(CGSize)size;
+ (UIImage *)croppedImage:(UIImage *)myImage :(CGRect)bounds;

//masking the image ....

+ (UIImage*) maskImage:(UIImage *)image withMask:(UIImage *)maskImage;

@end

.m 文件

#import "UIImage+MyImage.h"

@implementation UIImage (MyImage)

+ (void)beginImageContextWithSize:(CGSize)size
{
    if ([[UIScreen mainScreen] respondsToSelector:@selector(scale)]) {
        if ([[UIScreen mainScreen] scale] == 2.0) {
            UIGraphicsBeginImageContextWithOptions(size, YES, 2.0);
        } else {
            UIGraphicsBeginImageContext(size);
        }
    } else {
        UIGraphicsBeginImageContext(size);
    }
}

+ (void)endImageContext
{
    UIGraphicsEndImageContext();
}

+ (UIImage*)imageFromView:(UIView*)view
{
    [self beginImageContextWithSize:[view bounds].size];
    BOOL hidden = [view isHidden];
    [view setHidden:NO];
    [[view layer] renderInContext:UIGraphicsGetCurrentContext()];
    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    [self endImageContext];
    [view setHidden:hidden];
    return image;
}

+ (UIImage*)imageFromView:(UIView*)view scaledToSize:(CGSize)newSize
{
    UIImage *image = [self imageFromView:view];
    if ([view bounds].size.width != newSize.width ||
        [view bounds].size.height != newSize.height) {
        image = [self imageWithImage:image scaledToSize:newSize];
    }
    return image;
}

+ (UIImage*)imageWithImage:(UIImage*)image scaledToSize:(CGSize)newSize
{
    [self beginImageContextWithSize:newSize];
    [image drawInRect:CGRectMake(0,0,newSize.width,newSize.height)];
    UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
    [self endImageContext];
    return newImage;
}


+ (UIImage *)croppedImage:(UIImage *)myImage :(CGRect)bounds {
    CGImageRef imageRef = CGImageCreateWithImageInRect(myImage.CGImage, bounds);
    UIImage *croppedImage = [UIImage imageWithCGImage:imageRef];
    CGImageRelease(imageRef);
    CGSize asd =  croppedImage.size;
    return croppedImage;
}




+ (UIImage*) maskImage:(UIImage *)image withMask:(UIImage *)maskImage {

    CGImageRef maskRef = maskImage.CGImage; 

    CGImageRef mask = CGImageMaskCreate(CGImageGetWidth(maskRef),
                                        CGImageGetHeight(maskRef),
                                        CGImageGetBitsPerComponent(maskRef),
                                        CGImageGetBitsPerPixel(maskRef),
                                        CGImageGetBytesPerRow(maskRef),
                                        CGImageGetDataProvider(maskRef), NULL, false);

    CGImageRef masked = CGImageCreateWithMask([image CGImage], mask);

    CGImageRelease(mask);
    CGImageRelease(maskRef);
    return [UIImage imageWithCGImage:masked];

}



@end
于 2013-02-04T09:42:17.680 回答