一、重用版雪花下落
1.1 重用1
项目：Homework_20FallingSnow_Teacher0308
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.
self.window.backgroundColor = [UIColor grayColor];
[self.window makeKeyAndVisible];
/**
* 重用版雪花下落
1.创建多片雪花，通过for循环创建，存放到数组中
2.创建定时器，遍历雪花数组，判断雪花是否可以使用，判断标准：是否正在下落。可以使用就执行UIView动画
3.通过继承，创建一个UIImageView的子类，添加一个表示雪花状态的属性（BOOL）
4.动画结束，恢复雪花初始状态
*/
//1.创建多片雪花
NSMutableArray *snowArray = [[NSMutableArray alloc]initWithCapacity:20];
for (int i = 0; i < 20; i++)
{
//随机 雪花宽高
_widthAndHeight = arc4random()%30 + 20;
//随机 x坐标
float begin_x = arc4random()%(321-(int)_widthAndHeight);
ZYImageView *snow = [[ZYImageView alloc]initWithFrame:CGRectMake(begin_x, -_widthAndHeight, _widthAndHeight, _widthAndHeight)];
snow.image = [UIImage imageNamed:@"flake"];
snow.isDown = NO;
[snowArray addObject:snow];
[self.window addSubview:snow];
}
//2.创建定时器
NSTimer *timer = [NSTimer scheduledTimerWithTimeInterval:0.5 target:self selector:@selector(findAndFallSnow:) userInfo:snowArray repeats:YES];
return YES;
}
//找到雪花并使其下落
- (void)findAndFallSnow:(NSTimer *)timer
{
NSMutableArray *snowArray = timer.userInfo;
for (ZYImageView *snow in snowArray)
{
if (snow.isDown == NO)
{
snow.isDown = YES;
//下落
[UIView beginAnimations:nil context:(__bridge void *)snow];
[UIView setAnimationDuration:3];
//随机一个终点x坐标
float end_x = arc4random()%(321-(int)_widthAndHeight);
snow.frame = CGRectMake(end_x, SCREEN_HEIGHT-_widthAndHeight, _widthAndHeight, _widthAndHeight);
//调用结束方法，改变透明度
[UIView setAnimationDelegate:self];
[UIView setAnimationDidStopSelector:@selector(animationDidStop:finished:context:)];
[UIView commitAnimations];
//跳出整个for循环
break;
}
}
}
//结束方法，改变透明度
- (void)animationDidStop:(NSString *)animationID finished:(NSNumber *)finished context:(void *)context
{
ZYImageView *snow = (__bridge ZYImageView *)context;
[UIView beginAnimations:nil context:(__bridge void *)snow];
[UIView setAnimationDuration:3];
snow.alpha = 0;
//调用结束方法，恢复初始状态
[UIView setAnimationDelegate:self];
[UIView setAnimationDidStopSelector:@selector(animationDidStop1:finished:context:)];
[UIView commitAnimations];
}
//结束方法，恢复初始状态
- (void)animationDidStop1:(NSString *)animationID finished:(NSNumber *)finished context:(void *)context
{
ZYImageView *snow = (__bridge ZYImageView *)context;
//让雪花回到初始状态
snow.frame = CGRectMake(arc4random()%320, -_widthAndHeight, _widthAndHeight, _widthAndHeight);
snow.isDown = NO;
snow.alpha = 1;
}
1.2 重用2 使用animationID属性
项目：Homework_20FallingSnow_UseAnimationID_Teacher0308
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.
self.window.backgroundColor = [UIColor grayColor];
[self.window makeKeyAndVisible];
//1.创建雪花
UIImageView *snow = [[UIImageView alloc]initWithFrame:CGRectMake(100, -60, 60, 60)];
snow.image = [UIImage imageNamed:@"flake"];
snow.tag = 1;
[self.window addSubview:snow];
//2.开启定时器
NSTimer *timer = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(snowMove:) userInfo:snow repeats:YES];
return YES;
}
- (void)snowMove:(NSTimer *)timer
{
UIImageView *snow = timer.userInfo;
if (snow.tag == 1)
{
snow.tag = 2;//表示正在下落
//下落
[UIView beginAnimations:@"雪花下落" context:(__bridge void *)snow];
[UIView setAnimationDuration:3];
snow.frame = CGRectMake(200, 420, 60, 60);
[UIView setAnimationDelegate:self];
[UIView setAnimationDidStopSelector:@selector(animationDidStop:finished:context:)];
[UIView commitAnimations];
}
}
//动画结束，根据animationID来确定执行的动作
//两种情况，雪花下落、雪花融化
- (void)animationDidStop:(NSString *)animationID finished:(NSNumber *)finished context:(void *)context
{
UIImageView *snow = (__bridge UIImageView *)context;
if ([animationID isEqualToString:@"雪花下落"])
{
[UIView beginAnimations:@"雪花融化" context:(__bridge void *)snow];
[UIView setAnimationDuration:1];
snow.alpha = 0;
[UIView setAnimationDelegate:self];
[UIView setAnimationDidStopSelector:@selector(animationDidStop:finished:context:)];
[UIView commitAnimations];
}
if ([animationID isEqualToString:@"雪花融化"])
{
//恢复初始状态
snow.frame = CGRectMake(200, -60, 60, 60);
snow.tag = 1;
snow.alpha = 1;
}
}
二、跑马灯，反向运动
项目：Marquee_UIView0308
//设置反向运动的方法
[UIView setAnimationRepeatAutoreverses:YES];
//重复次数
[UIView setAnimationRepeatCount:LONG_MAX];
三、飞机游戏
项目：Plane_TouchAction0308
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.window.backgroundColor = [UIColor whiteColor];
[self.window makeKeyAndVisible];
_imageView = [[UIImageView alloc]initWithFrame:CGRectMake(100, 100, 60, 60)];
_imageView.backgroundColor = [UIColor redColor];
[self.window addSubview:_imageView];
//判断两个矩形块儿是否交叉
//CGRectIntersectsRect(CGRect rect1, CGRect rect2);
return YES;
}
//拖动事件
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
//1.获取touch事件
UITouch *touch = [touches anyObject];
//2.获取触摸的点坐标
CGPoint point = [touch locationInView:self.window];
//3.将坐标赋给图片
//在矩形块儿上拖拽
if (CGRectContainsPoint(_imageView.frame, point))
{
_imageView.center = point;
}
}
// NSMutableArray *myPlaneArray = [[NSMutableArray alloc]initWithCapacity:2];
// for (int i =0; i<2; i++)
// {
// NSString *name = [NSString stringWithFormat:@"plane%d",i];
// UIImage *planeImg = [UIImage imageNamed:name];
// [myPlaneArray addObject:planeImg];
// }
// myPlane.planeBody = [[UIImageView alloc]initWithFrame:CGRectMake(200, 200, 100, 100)];
// myPlane.planeBody.animationImages = myPlaneArray;
// myPlane.planeBody.animationDuration = 1;
// myPlane.planeBody.animationRepeatCount = 0;
// [self.window addSubview:myPlane.planeBody];