CALayer上设置动画，网络编程

---CALayer上设置动画---

设置属性

@property(nonatomic,strong)CALayer *layer;

初始化CALayer

_layer=[[CALayer alloc]init];

_layer.frame=CGRectMake(50, 50, 100, 100);

_layer.backgroundColor=[UIColor cyanColor].CGColor;

CALayer上添加图片

UIImage *image =[UIImage imageNamed:@„韩非01.jpg"];

_layer.contents=(id)(image.CGImage);

_layer.cornerRadius=5;

[self.view.layer addSublayer:_layer];

移动

CABasicAnimation *moveAnimation=[CABasicAnimation animationWithKeyPath:@„position"];

移动的初始值

moveAnimation.fromValue=[NSValue valueWithCGPoint:_layer.position];

CGPoint point=_layer.position; point.x+=180; point.y+=180;

移动的结束值

moveAnimation.toValue=[NSValue valueWithCGPoint:point];

开始动画

[_layer addAnimation:moveAnimation forKey:nil];

旋转

CABasicAnimation *rotateAnimation=[CABasicAnimation animationWithKeyPath:@„transform.rotation.x"];

旋转的初始值

rotateAnimation.fromValue=[NSNumber numberWithFloat:0.0];

旋转的结束值

rotateAnimation.toValue=[NSNumber numberWithFloat:6.2 * M_PI];

开始动画

[_layer addAnimation:rotateAnimation forKey:nil];

缩放

CABasicAnimation * scaleAnimation=[CABasicAnimation animationWithKeyPath:@"transform.scale.x"];

缩放初始值

scaleAnimation.fromValue=[NSNumber numberWithFloat:1.0];

缩放结束值

scaleAnimation.toValue=[NSNumber numberWithFloat:3.0];

scaleAnimation.fillMode=kCAFillModeForwards;

开始动画

[_layer addAnimation:scaleAnimation forKey:nil];

实例化组合

CAAnimationGroup *group=[CAAnimationGroup animation];

组合

group.animations=[NSArray arrayWithObjects:moveAnimation,rotateAnimation,scaleAnimation ,nil];

group.fillMode=kCAFillModeBackwards;

开始动画

[_layer addAnimation:group forKey:nil];

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CABasicAnimation,CAAnimationGroup的属性

-1-到达目的地以后，动画返回开始的值

group.autoreverses=YES;

-2-开始值到结束值花费的时间

group.duration=4.0;

-3-在指定的时间段完成后，动画就自动从上层移除了

group.removedOnCompletion=YES;

-4-动画播放的速度倍数

group.speed=1;

-5-指定开始播放动画的时间

group.beginTime=2;

-6-时间的偏移量

group.timeOffset=2;

-----网络编程-----

NSURL *url=[NSURL URLWithString:@"https://api.heweather.com/x3/citylist?search=allchina&key=48d7d68f454c4e01b3005e671c849990"];

请求数据

NSURLRequest *request=[NSURLRequest requestWithURL:url];

响应数据

NSURLResponse *response=nil;

JSON格式的数据

NSData *data=[NSURLConnection sendSynchronousRequest:request returningResponse:&response error:nil];

测试是否有值

NSLog(@"data--%@",data);

字典接收JSON格式的数据

NSDictionary *dic=[NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];

NSLog(@"dic--%@",dic);

数组接收字典的键

NSArray *array=dic[@"city_info"];

NSLog(@"array--%@",array);

遍历 for (id obj in array)

{NSLog(@"obj--%@",obj[@"city"]);}