(NO.00001)iOS游戏SpeedBoy Lite成形记(十六)

来源：互联网发布：中文logo设计软件编辑：程序博客网时间：2024/06/03 19:39

接上篇,我们实现菜单窗口的弹出和关闭功能,首先在打开GameScene.m,添加必要的实例变量:

    __weak PopupLayer *_popupLayer;

再添加2个新方法:

-(void)removePopup{    if (_popupLayer) {        NSString *popupName = _popupLayer.name;        [_popupLayer removeFromParent];        _popupLayer = nil;        self.userInteractionEnabled = YES;    }}-(void)showPopupNamed:(NSString*)popupName{    if (!_popupLayer) {        PopupLayer *newPopupLayer = (PopupLayer*)[CCBReader load:popupName];        NSAssert(newPopupLayer, @"%@ popupLayer must not nil",popupName);        newPopupLayer.scale = 0.f;        [self addChild:newPopupLayer];        _popupLayer = newPopupLayer;        _popupLayer.gameScene = self;        self.userInteractionEnabled = NO;        CCActionScaleTo *scaleAction = [CCActionScaleTo actionWithDuration:0.5 scale:1.0f];        [_popupLayer runAction:scaleAction];    }}

代码很简单,打开窗口时首先确保没有窗口已经被打开,然后按名称加载窗口,关闭GameScene节点与用户的交互功能,然后用放大动画从无显示弹出的菜单窗口.
关闭窗口时,首先确保当前有窗口被打开,然后恢复打开窗口方法里的动作.

因为我们要从外部调用GameScene类的方法,所以要修改接口文件:

-(void)removePopup;-(void)showPopupNamed:(NSString*)popupName;

接下来打开PopupLayer.h文件,在import语句下方添加:

@class GameScene;

这里不用#import “GameScene.h”,为的是避免可能的重复包含头文件.在接口声明中添加一个新属性:

@property (nonatomic,strong) GameScene *gameScene;

下面打开PopupLayer.m文件补全之前留空的回调方法:

-(void)moneyEntered{    NSString *text = _moneyText.string;    CCLOG(@"text is %@",text);    @try {        self.money = text.intValue;    }    @catch (NSException *exception) {        CCLOG(@"exception is %@",exception.debugDescription);    }}-(BOOL)isMoneyValid{    if (self.money <= 0) {        return NO;    }else if (self.money > [GameState sharedInstance].totalMoney)        return NO;    else        return YES;}-(void)closePopup{    CCLOG(@"%@",self.name);    if ([self.name isEqualToString:@"moneyLayer"]) {        self.money = _moneyText.string.intValue;        if (![self isMoneyValid]) {            GameState *gameState = [GameState sharedInstance];            [gameState.interface updateStatusLabel:@"主上您压上的银两不够啊 ;)"];            return;        }        GameState *gameState = [GameState sharedInstance];        gameState.money = self.money;    }    [self.gameScene removePopup];}

大家现在编译肯定会出错的,因为里面有一个陌生的类GameState,我们下一篇就来实现它 ;)

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