导入框架：
#import <AVFoundation>
声明全局变量：
@interface ViewController ()<AVAudioRecorderDelegate>
{
AVAudioRecorder *audioRecorder;
}
@end
在ViewDidLoad中：
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
button.frame = CGRectMake(100, 100, 100, 100);
;
button.b
