设置输出视频设置时出错

Question

output.videoSettings = [NSDictionary dictionaryWithObject:
    [NSNumber numberWithInt:kCVPixelFormatType_32BGRA]
    forKey:(id)kCVPixelBufferPixelFormatTypeKey];

我在这个特定的行上出现了这个错误

No known class method for selector "dictionaryWithObject:forKey:

出现此错误的原因是什么？

Answer 1

试试这个：

videoOutput.videoSettings = [NSDictionary dictionaryWithObjectsAndKeys:[NSNumber numberWithUnsignedInt:kCVPixelFormatType_32BGRA], (id)kCVPixelBufferPixelFormatTypeKey,
                             nil];