枚举的使用

首先,命名的规范及可读性

 

typedef enum

{

    BtnState_readyRecod,

    BtnState_starRecod

    

}BtnState;

 

最常见的事用在button中,btn点击需要改动状态,根据状态改变事件及做出变化 看例子

- (IBAction)remakeAction:(id)sender {

    

    if (self.remakeListen == RemakerecodeMusic_ready) {

        //该图片状态

        [self.remakeBtn setBackgroundImage:[UIImage imageNamed:@"lygs_zczt2.png"] forState:UIControlStateNormal];

        

        //清除录音

        [[LVRecordTool sharedRecordTool].recorder stop];

        self.timeLabel.text = @"00:00";

        //开始录音

        [[LVRecordTool sharedRecordTool] startRecording];

        self.remakeListen = RemakerecodeMusic_recode;

        [self.recordBtn setBackgroundImage:[UIImage imageNamed:@"lygs_axzt3"] forState:UIControlStateNormal];

        self.btnstate = BtnState_starRecod;

        

        

        NSTimer *timer = [NSTimer timerWithTimeInterval:1 target:self selector:@selector(labelPulstimerAction) userInfo:nil repeats:YES];

        [[NSRunLoop mainRunLoop] addTimer:timer forMode:NSRunLoopCommonModes];

        [timer fire];

        self.REtimer = timer;

        return;

        

    }else if (self.remakeListen == RemakerecodeMusic_recode){

        [self.REtimer invalidate];

        self.REtimer = nil;

        [[LVRecordTool sharedRecordTool]stopRecording];

        self.timeLabel.text = @"00:00";

      [self.remakeBtn setBackgroundImage:[UIImage imageNamed:@"lygs_jzzt2.png"] forState:UIControlStateNormal];

        self.remakeListen = RemakerecodeMusic_ready;

        self.btnstate = BtnState_readyRecod;

        [self.recordBtn setBackgroundImage:[UIImage imageNamed:@"lygs_zczt3.png"] forState:UIControlStateNormal];

    

    }

  }

 

上面的代码很详细;