小编Mor*_*pps的帖子

我正在为iOS创建合成器.在玩完并试图学习核心音频之后,我遇到了一个我无法理解的问题.我的正弦波会定期发出咔哒声,我猜这与相位有关.我看过几本关于这个主题的指南和书籍,并且都表明我正确地做了.

如果有人愿意为我查看我的代码,我将不胜感激.

static OSStatus renderInput(void *inRefCon, AudioUnitRenderActionFlags *ioActionFlags, const AudioTimeStamp *inTimeStamp, UInt32 inBusNumber, UInt32 inNumberFrames, AudioBufferList *ioData)
{


    // Get a reference to the object that was passed with the callback
    // In this case, the AudioController passed itself so
    // that you can access its data.
    AudioController *THIS = (AudioController*)inRefCon;

    // Get a pointer to the dataBuffer of the AudioBufferList
    AudioSampleType *outA = (AudioSampleType *)ioData->mBuffers[0].mData;

    float freq = THIS->Frequency;   
    float phase = THIS->sinPhase;

    float envValue;
    float sinSignal;

    // The …

我已经设置了一个动画块,以便在用户执行搜索时启动.搜索完成后,将推送新视图.这工作正常,直到用户选择后退按钮并再次尝试搜索,现在动画无法启动.

[UIView animateWithDuration:0.25
                      delay:0.0
                    options:(UIViewAnimationOptionRepeat | UIViewAnimationOptionCurveLinear)
                 animations:^{

                     _collectionImage.transform = CGAffineTransformMakeRotation(M_PI);

                 }
                 completion:^(BOOL finished){
                     NSLog(@"Done!");
                 }];

在任何人询问之前,动画只是旋转的光盘,并且在推入视图加载时调用完成块.任何有关为什么它不会在多次搜索中制作动画的帮助将不胜感激.

谢谢.