1.首先匯入系統庫  Accelerate.framework

2.其次在要實現毛玻璃效果的頁面新增標頭檔案   #import <Accelerate/Accelerate.h>

3.再次新增實現函式如下：

//加模糊效果函式，傳入引數：image是圖片，blur是模糊度（0~2.0之間）

- (UIImage *)blurryImage:(UIImage *)image withBlurLevel:(CGFloat)blur

{

//模糊度,

    if ((blur < 0.1f) || (blur > 2.0f))

    {

        blur = 0.5f;

    }

//boxSize必須大於

    int boxSize = (int)(blur * 100);

    boxSize -= (boxSize % 2) + 1;

    NSLog(@"boxSize:%i",boxSize);

//影象處理

    CGImageRef img = image.CGImage;

//影象快取,輸入快取，輸出快取

    vImage_Buffer inBuffer, outBuffer;

vImage_Error error;

//畫素快取

    void *pixelBuffer;

//資料來源提供者，Defines an opaque type that supplies Quartz with data.

CGDataProviderRef inProvider =

// provider’s data.

    CFDataRef inBitmapData = CGDataProviderCopyData(inProvider);

//寬，高，位元組/行，data

    inBuffer.width = CGImageGetWidth(img);

    inBuffer.height = CGImageGetHeight(img);

    inBuffer.rowBytes = CGImageGetBytesPerRow(img);

    inBuffer.data = (void*)CFDataGetBytePtr

//像數快取，位元組行*圖片高

    pixelBuffer = malloc(CGImageGetBytesPerRow(img) * CGImageGetHeight(img));

    outBuffer.data = pixelBuffer;

    outBuffer.width = CGImageGetWidth(img);

    outBuffer.height = CGImageGetHeight(img);

    outBuffer.rowBytes = CGImageGetBytesPerRow(img);

// 第三個中間的快取區,抗鋸齒的效果

void *pixelBuffer2 = malloc(CGImageGetBytesPerRow(img) * CGImageGetHeight(img));

    vImage_Buffer outBuffer2;

    outBuffer2.data = pixelBuffer2;

    outBuffer2.width = CGImageGetWidth(img);

    outBuffer2.height = CGImageGetHeight(img);

    outBuffer2.rowBytes = CGImageGetBytesPerRow(img);

//將一個隱式的M×N區域顆粒和具有箱式濾波器的效果的ARGB8888源影象進行卷積運算得到作用區域。

    error = vImageBoxConvolve_ARGB8888(&inBuffer, &outBuffer2, NULL, 0, 0, boxSize, boxSize, NULL, kvImageEdgeExtend);

    error = vImageBoxConvolve_ARGB8888(&outBuffer2, &inBuffer, NULL, 0, 0, boxSize, boxSize, NULL, kvImageEdgeExtend);

    error = vImageBoxConvolve_ARGB8888(&inBuffer, &outBuffer, NULL, 0, 0, boxSize, boxSize, NULL, kvImageEdgeExtend);

    if (error)

    {

NSLog(@"error from convolution %ld", error);

    }

//    NSLog(@"位元組組成部分：%zu",CGImageGetBitsPerComponent(img));

//顏色空間DeviceRGB

CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();

//用圖片建立上下文,CGImageGetBitsPerComponent(img),7,8

CGContextRef ctx = CGBitmapContextCreate(

                                             outBuffer.data,

                                             outBuffer.width,

                                             outBuffer.height,

                                             8,

                                             outBuffer.rowBytes,

                                             colorSpace,

                                             CGImageGetBitmapInfo(image.CGImage));

//根據上下文，處理過的圖片，重新元件

CGImageRef imageRef = CGBitmapContextCreateImage (ctx);

    UIImage *returnImage = [UIImage imageWithCGImage:imageRef];

//clean up

CGContextRelease(ctx);

CGColorSpaceRelease(colorSpace);

    free(pixelBuffer);

    free(pixelBuffer2);

    CFRelease(inBitmapData);

    CGImageRelease(imageRef);

    return returnImage;

}

UIImage * maoImage = [UIImageimageNamed:@"aboutBackImage.jpg"];;

    tabBarImage.image = [self blurryImage:maoImage withBlurLevel:0.5];

大功告成，(*^__^*) ……小夥伴們快去試試效果吧~