小编shu*_*ren的帖子

当它被缩放时,UIImage总是变得模糊不清.如果让它保持清晰,我该怎么办？

- (UIImage *)rescaleImageToSize:(CGSize)size {
    CGRect rect = CGRectMake(0.0, 0.0, size.width, size.height);
    UIGraphicsBeginImageContext(rect.size);
    [self drawInRect:rect];  // scales image to rect
    UIImage *resImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return resImage;
}

最近,我正在看aurioTouch.但我无法理解这句话:

OSStatus err = AudioUnitRender (THIS-> rioUnit, ioActionFlags, inTimeStamp, 1, inNumberFrames, ioData); 

根据apple documentaion解释:启动音频单元的渲染周期.但我觉得很暧昧.怎么办？