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几个简单动画代码
瑀辰(｢･ω･)｢嘿: 1. UIView animateWithDuration:animations:completion: Animate changes to one or more views using the specified duration and completion handler. + (void)animateWithDuration:(NSTimeInterval)duration animations:(void (^)(void))animations completion:(void (^)(BOOL finished))completion Parameters duration The total duration of the animations, measured in seconds. If you specify a negative value or 0, the changes are made without animating them. animations A block object containing the changes to commit to the views. This is where you programmatically change any animatable properties of the views in your view hierarchy. This block takes no parameters and has no return value. This parameter must not be NULL. completion A block object to be executed when the animation sequence ends. This block has no return value and takes a single Boolean argument that indicates whether or not the animations actually finished before the completion handler was called. If the duration of the animation is 0, this block is performed at the beginning of the next run loop cycle. This parameter may be NULL. Discussion This method performs the specified animations immediately using the UIViewAnimationOptionCurveEaseInOut andUIViewAnimationOptionTransitionNone animation options. For example, if you want to fade a view until it is totally transparent and then remove it from your view hierarchy, you could use code similar to the following: [UIView animateWithDuration:0.2 animations:^{view.alpha = 0.0;} completion:^(BOOL finished){ [view removeFromSuperview]; }]; During an animation, user interactions are temporarily disabled for the views being animated. (Prior to iOS 5, user interactions are disabled for the entire application.) Availability Available in iOS 4.0 and later. Declared In UIView.h eg: - (void)ShowGameButton { singleGameBt.alpha = 0; [UIView animateWithDuration:0.1 animations:^{ singleGameBt.alpha = 1; } completion:^(BOOL finished){ }]; doubleGameBt.alpha = 0; [UIView animateWithDuration:0.5 animations:^{ doubleGameBt.alpha = 1; } completion:^(BOOL finished){ }]; connectedGameBt.alpha = 0; [UIView animateWithDuration:0.9 animations:^{ connectedGameBt.alpha = 1; } completion:^(BOOL finished){ }]; gameSettingBt.alpha = 0; [UIView animateWithDuration:1.3 animations:^{ gameSettingBt.alpha = 1; } completion:^(BOOL finished){ }]; aboutBt.alpha = 0; [UIView animateWithDuration:1.7 animations:^{ aboutBt.alpha = 1; } completion:^(BOOL finished){ }]; moreGameBt.alpha = 0; [UIView animateWithDuration:2.1 animations:^{ moreGameBt.alpha = 1; } completion:^(BOOL finished){ }]; } 2. UIImageView animationImages An array of UIImage objects to use for an animation. @property(nonatomic, copy) NSArray *animationImages Discussion The array must contain UIImage objects. You may use the same image object more than once in the array. Setting this property to a value other than nil hides the image represented by the image property. The value of this property is nil by default. Availability Available in iOS 2.0 and later. See Also @property image @property contentMode (UIView)
iOS使用DES加解密
好听的名字千篇一律: Byte iv[] = {1,2,3,4,5,6,7,8}; 这行代码是什么意思求解啊
ios根据视频地址获取某一帧的图像
baidu_35151683: thumbnailImageRef = [assetImageGenerator copyCGImageAtTime:CMTimeMake(thumbnailImageTime, 60)actualTime:NULL error:&thumbnailImageGenerationError]; 这一行代码在上传本地视频时，会出错
SQLITE3 使用总结
brimsullowr: 学到了不少东西，谢谢博主
Gzip compression/decompression
IOS_Mainstay: 你好，请问一下是如何调用的，为什么我使用后返回值是null，请求帮助一下，谢谢

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作者: 夏一鸣

IOS Dev

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极小极大搜索方法、负值最大算法和Alpha-Beta搜索方法

1. 极小极大搜索方法一般应用在博弈搜索中，比如：围棋，五子棋，象棋等。结果有三种可能：胜利、失败和平局。暴力搜索，如果想通过暴力搜索，把最终的结果得到的话，搜索树的深度太大了，机器不能满足，一般都是规定一个搜索的深度，在这个深度范围内进行深度优先搜索。假设：A和Ｂ对弈，轮到Ａ走棋了，那么我们会遍历A的每一个可能走棋方法，然后对于前面A的每一个走棋方法，遍历B的每一个走棋方

转载 2012-06-06 18:53:14 · 9577 阅读 · 0 评论

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作者: 夏一鸣

极小极大搜索方法、负值最大算法和Alpha-Beta搜索方法