IOS 图片 移动 缩放 旋转 transform属性

转自某大神博客

#import "YYViewController.h"//私有扩展@interface YYViewController ()@property(nonatomic,weak)IBOutlet UIButton *headImageView;@end@implementation YYViewController//枚举类型，从1开始//枚举类型有一个很大的作用，就是用来代替程序中的魔法数字typedef enum{    ktopbtntag=1,    kdownbtntag,    krightbtntag,    kleftbtntag}btntag;//viewDidLoad是视图加载完成后调用的方法，通常在此方法中执行视图控制器的初始化工作- (void)viewDidLoad{    //在viewDidLoad方法中，不要忘记调用父类的方法实现    [super viewDidLoad];    //手写控件代码    //一、写一个按钮控件，上面有一张图片    //1.使用类创建一个按钮对象   // UIButton *headbtn=[[UIButton alloc] initWithFrame:CGRectMake(100 ,100, 100, 100)];    //设置按钮对象为自定义型    UIButton *headbtn=[UIButton buttonWithType:UIButtonTypeCustom];    //2.设置对象的各项属性    //(1)位置等通用属性设置    headbtn.frame=CGRectMake(100, 100, 100, 100);    //(2)设置普通状态下按钮的属性    [headbtn setBackgroundImage:[UIImage imageNamed:@"i"] forState:UIControlStateNormal];    [headbtn setTitle:@"点我！" forState:UIControlStateNormal];    [headbtn setTitleColor:[UIColor redColor] forState:UIControlStateNormal];    //(3)设置高亮状态下按钮的属性    [headbtn setBackgroundImage:[UIImage imageNamed:@"a"] forState:UIControlStateHighlighted];    [headbtn setTitle:@"还行吧~" forState:UIControlStateHighlighted];    [headbtn setTitleColor:[UIColor blueColor] forState:UIControlStateHighlighted];    //3.把对象添加到视图中展现出来    [self.view addSubview:headbtn];    //注意点！    self.headImageView=headbtn;    //二、写四个控制图片左右上下移动方向的按钮控件    /**================向上的按钮=====================*/    //1.创建按钮对象    UIButton *topbtn=[UIButton buttonWithType:UIButtonTypeCustom];    //2.设置对象的属性    topbtn.frame=CGRectMake(100, 250, 40, 40);    [topbtn setBackgroundImage:[UIImage imageNamed:@"top_normal"] forState:UIControlStateNormal];    [topbtn setBackgroundImage:[UIImage imageNamed:@"top_highlighted"] forState:UIControlStateHighlighted];    [topbtn setTag:1];    //3.把控件添加到视图中    [self.view addSubview:topbtn];    //4.按钮的单击控制事件    [topbtn addTarget:self action:@selector(Click:) forControlEvents:UIControlEventTouchUpInside];      /**================向下的按钮=====================*/    //1.创建按钮对象    UIButton *downbtn=[UIButton buttonWithType:UIButtonTypeCustom];    //2.设置对象的属性    downbtn.frame=CGRectMake(100, 350, 40, 40);    [downbtn setBackgroundImage:[UIImage imageNamed:@"bottom_normal"] forState:UIControlStateNormal];    [downbtn setBackgroundImage:[UIImage imageNamed:@"bottom_highlighted"] forState:UIControlStateHighlighted];    [downbtn setTag:2];    //3.把控件添加到视图中    [self.view addSubview:downbtn];    //4.按钮的单击控制事件    [downbtn addTarget:self action:@selector(Click:) forControlEvents:UIControlEventTouchUpInside];     /**================向左的按钮=====================*/    //1.创建按钮对象    UIButton *leftbtn=[UIButton buttonWithType:UIButtonTypeCustom];    //2.设置对象的属性    leftbtn.frame=CGRectMake(50, 300, 40, 40);    [leftbtn setBackgroundImage:[UIImage imageNamed:@"left_normal"] forState:UIControlStateNormal];    [leftbtn setBackgroundImage:[UIImage imageNamed:@"left_highlighted"] forState:UIControlStateHighlighted];    [leftbtn setTag:4];    //3.把控件添加到视图中    [self.view addSubview:leftbtn];    //4.按钮的单击控制事件    [leftbtn addTarget:self action:@selector(Click:) forControlEvents:UIControlEventTouchUpInside];    /**================向右的按钮=====================*/    //1.创建按钮对象    UIButton *rightbtn=[UIButton buttonWithType:UIButtonTypeCustom];    //2.设置对象的属性    rightbtn.frame=CGRectMake(150, 300, 40, 40);    [rightbtn setBackgroundImage:[UIImage imageNamed:@"right_normal"] forState:UIControlStateNormal];    [rightbtn setBackgroundImage:[UIImage imageNamed:@"right_highlighted"] forState:UIControlStateHighlighted];    [rightbtn setTag:3];    //3.把控件添加到视图中    [self.view addSubview:rightbtn];    //4.按钮的单击控制事件    [rightbtn addTarget:self action:@selector(Click:) forControlEvents:UIControlEventTouchUpInside];      //三、写两个缩放按钮       /**================放大的按钮=====================*/    //1.创建对象    UIButton *plusbtn=[UIButton buttonWithType:UIButtonTypeCustom];    //2.设置属性    plusbtn.frame=CGRectMake(75, 400, 40, 40);    [plusbtn setBackgroundImage:[UIImage imageNamed:@"plus_normal"] forState:UIControlStateNormal];    [plusbtn setBackgroundImage:[UIImage imageNamed:@"plus_highlighted"] forState:UIControlStateHighlighted];    [plusbtn setTag:1];    //3.添加到视图    [self.view addSubview:plusbtn];    //4.单击事件    [plusbtn addTarget:self action:@selector(Zoom:) forControlEvents:UIControlEventTouchUpInside];    /**================缩小的按钮=====================*/    UIButton *minusbtn=[UIButton buttonWithType:UIButtonTypeCustom];    minusbtn.frame=CGRectMake(125, 400, 40, 40);    [minusbtn setBackgroundImage:[UIImage imageNamed:@"minus_normal"] forState:UIControlStateNormal];    [minusbtn setBackgroundImage:[UIImage imageNamed:@"minus_highlighted"] forState:UIControlStateHighlighted];    [minusbtn setTag:0];    [self.view addSubview:minusbtn];    [minusbtn addTarget:self action:@selector(Zoom:) forControlEvents:UIControlEventTouchUpInside];    /**================向左旋转按钮=====================*/    UIButton *leftrotatebtn=[UIButton buttonWithType:UIButtonTypeCustom];    [leftrotatebtn setFrame:CGRectMake(175, 400, 40, 40)];    [leftrotatebtn setBackgroundImage:[UIImage imageNamed:@"left_rotate_normal"] forState:UIControlStateNormal];    [leftrotatebtn setBackgroundImage:[UIImage imageNamed:@"left_rotate_highlighted"] forState:UIControlStateHighlighted];    [leftrotatebtn setTag:1];    [self.view addSubview:leftrotatebtn];    [leftrotatebtn addTarget:self action:@selector(Rotate:) forControlEvents:UIControlEventTouchUpInside];    /**================向右旋转按钮=====================*/    UIButton *rightrotatebtn=[UIButton buttonWithType:UIButtonTypeCustom];    [rightrotatebtn setFrame:CGRectMake(225, 400, 40, 40)];    [rightrotatebtn setBackgroundImage:[UIImage imageNamed:@"right_rotate_normal"] forState:UIControlStateNormal];    [rightrotatebtn setBackgroundImage:[UIImage imageNamed:@"right_rotate_highlighted"] forState:UIControlStateHighlighted];    [rightbtn setTag:0];    [self.view addSubview:rightrotatebtn];    [rightrotatebtn addTarget:self action:@selector(Rotate:) forControlEvents:UIControlEventTouchUpInside];}//控制方向的多个按钮调用同一个方法-(void)Click:(UIButton *)button{    //练习使用frame属性    //CGRect frame=self.headImageView.frame;    /**注意，这里如果控制位置的两个属性frame和center同时使用的话，会出现很好玩的效果，注意分析*/    //练习使用center属性    CGPoint center=self.headImageView.center;    switch (button.tag) {        case ktopbtntag:            center.y-=30;            break;        case kdownbtntag:            center.y+=30;            break;        case kleftbtntag:           //center.x=center.x-30;            center.x-=50;            break;        case krightbtntag:            center.x+=50;            break;    } //  self.headImageView.frame=frame;    //首尾式设置动画效果    [UIView beginAnimations:nil context:nil];    self.headImageView.center=center;    //设置时间    [UIView setAnimationDuration:2.0];    [UIView commitAnimations];    NSLog(@"移动!");}-(void)Zoom:(UIButton *)btn{    //使用bounds，以中心点位原点进行缩放    CGRect bounds = self.headImageView.bounds;    if (btn.tag) {        bounds.size.height+=30;        bounds.size.width+=30;    }    else    {        bounds.size.height-=50;        bounds.size.width-=50;    }    //设置首尾动画    [UIView beginAnimations:nil context:nil];    self.headImageView.bounds=bounds;    [UIView setAnimationDuration:2.0];    [UIView commitAnimations];}-(void)Rotate:(UIButton *)rotate{    //位移（不累加）    //self.headImageView.transform=CGAffineTransformMakeTranslation(50, 200);    //缩放    //self.headImageView.transform=CGAffineTransformMakeScale(1.2, 10);    //在原有的基础上位移（是累加的）    //self.headImageView.transform=CGAffineTransformTranslate(self.headImageView.transform, 50, 50);    //在原有的基础上进行缩放    //self.headImageView.transform=CGAffineTransformScale(self.headImageView.transform, 1.5, 1.6);    //在原有的基础上进行旋转    if (rotate.tag) {        //旋转角度为1/pi，逆时针        self.headImageView.transform=CGAffineTransformRotate(self.headImageView.transform, -M_1_PI);    }    else    {        //旋转的角度为pi/2，顺时针    self.headImageView.transform=CGAffineTransformRotate(self.headImageView.transform, M_PI_2);    }}@end