小编Dre*_*her的帖子

我阅读了Apple文档,了解如何使用串行队列来确保以可预测的顺序执行任务,但现在我感到困惑太多了.
一些我如何能够连续工作,但我仍然不清楚,所以我需要简单的串行示例,我的方法串行执行.

我将我的功能划分为4个部分,现在希望它们执行Serially

[self ReadAllImagesFromPhotosLibrary];

[self WriteFewImagestoDirectory];

[self GettingBackAllImagesFromFolder]; 

[self MoveToNextView];

我正在使用CI过滤器并得到奇怪的错误,我怎么能通过查看登录来了解我所缺少的内容

CIFilter *filter = [CIFilter filterWithName:@"CIFalseColor"];        
    [filter setValue:image forKey:@"inputImage"];
    CIColor *myBlue = [CIColor colorWithRed:0.0 green:0.0 blue:0.6 alpha:0.5];
    [filter setValue:myBlue forKey:@"inputColor0"];
    CIImage *filteredImageData = [filter valueForKey:@"outputImage"];
    UIImage *newImage = [UIImage imageWithCIImage:filteredImageData];
     _imageView.image=newImage;



2014-02-22 16:04:12.002 colorMaker[1574:70b] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UIImage _imageByUnpremultiplying]: unrecognized selector sent to instance 0x8b7aca0'

libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)