(純代碼 )transform旋轉:

// 實現圖片的旋轉和移動和放大縮小

#import "ViewController.h"

@interface ViewController ()

@property (nonatomic, weak) UIButton *_btnImage;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    /** 頭像圖片 */
    // 設置按鈕爲自定義樣式
    UIButton *btnImage = [UIButton buttonWithType:UIButtonTypeCustom];
    // 設置位置和尺寸
    btnImage.frame = CGRectMake(50, 50, 284, 312);
    
    //  高光
    // 設置文字及對應狀態
    [btnImage setTitle:@"高光啊。。。。" forState:UIControlStateHighlighted];
     // 設置文字顏色及對應狀態
    [btnImage setTitleColor:[UIColor greenColor] forState:UIControlStateHighlighted];
    // 設置文字樣式和大小
    btnImage.titleLabel.font = [UIFont fontWithName:nil size:35.0];
    [btnImage setBackgroundImage:[UIImage imageNamed:@"biaoqingdi"] forState:UIControlStateHighlighted];
    
    // 普通
    [btnImage setTitle:@"普通啊。。。。" forState:UIControlStateNormal];
    [btnImage setTitleColor:[UIColor yellowColor] forState:UIControlStateNormal];
    [btnImage setBackgroundImage:[UIImage imageNamed:@"chiniupa"] forState:UIControlStateNormal];
    [self.view addSubview:btnImage];
    // 方面之後使用或修改控件屬性
    self._btnImage = btnImage;
    
    /** 左旋轉 */
    UIButton *btnLeftRotate = [UIButton buttonWithType:UIButtonTypeCustom];
    btnLeftRotate.frame = CGRectMake(285, 400, 50, 50);
    [btnLeftRotate setImage:[UIImage imageNamed:@"left_rotate_normal"] forState:UIControlStateNormal];
    [btnLeftRotate setImage:[UIImage imageNamed:@"left_rotate_highlighted"] forState:UIControlStateHighlighted];
    [self.view addSubview:btnLeftRotate];
    [btnLeftRotate addTarget:self action:@selector(btnRotate:) forControlEvents:UIControlEventTouchUpInside];
    [btnLeftRotate setTag:1];
    
    
    /** 右旋轉 */
    UIButton *btnRightRotate = [UIButton buttonWithType:UIButtonTypeCustom];
    btnRightRotate.frame =CGRectMake(285, 500, 50, 50);
    [btnRightRotate setImage:[UIImage imageNamed:@"right_rotate_normal"] forState:UIControlStateNormal];
    [btnRightRotate setImage:[UIImage imageNamed:@"right_rotate_highlighted"] forState:UIControlStateHighlighted];
    [self.view addSubview:btnRightRotate];
    [btnRightRotate addTarget:self action:@selector(btnRotate:) forControlEvents:UIControlEventTouchUpInside];
    [btnRightRotate setTag:2];
    
    /** 向上移動 */
    UIButton *btnUp = [UIButton buttonWithType:UIButtonTypeCustom];
    btnUp.frame = CGRectMake(100, 400, 50, 50);
    [btnUp setImage:[UIImage imageNamed:@"top_normal"] forState:UIControlStateNormal];
    [btnUp setImage:[UIImage imageNamed:@"top_highlighted"] forState:UIControlStateHighlighted];
    [self.view addSubview:btnUp];
    [btnUp setTag:1];
    [btnUp addTarget:self action:@selector(btnRun:) forControlEvents:UIControlEventTouchUpInside];
    
    /** 向左移動 */
    UIButton *btnLeft = [UIButton  buttonWithType:UIButtonTypeCustom];
    btnLeft.frame = CGRectMake(50, 450, 50, 50);
    [btnLeft setImage:[UIImage imageNamed:@"left_normal"] forState:UIControlStateNormal];
    [btnLeft setImage:[UIImage imageNamed:@"left_highlighted"] forState:UIControlStateHighlighted];
    [self.view addSubview:btnLeft];
    [btnLeft setTag:2];
    [btnLeft addTarget:self action:@selector(btnRun:) forControlEvents:UIControlEventTouchUpInside];
    
    /** 向右移動 */
    UIButton *btnRight = [UIButton buttonWithType:UIButtonTypeCustom];
    btnRight.frame = CGRectMake(150, 450, 50, 50);
    [btnRight setImage:[UIImage imageNamed:@"right_normal"] forState:UIControlStateNormal];
    [btnRight setImage:[UIImage imageNamed:@"right_highlighted"] forState:UIControlStateHighlighted];
    [self.view addSubview:btnRight];
    [btnRight setTag:3];
    
    [btnRight addTarget:self action:@selector(btnRun:) forControlEvents:UIControlEventTouchUpInside];
    
    /** 向下移動 */
    UIButton *btnDown = [UIButton buttonWithType:UIButtonTypeCustom];
    btnDown.frame = CGRectMake(100, 500, 50, 50);
    [btnDown setImage:[UIImage imageNamed:@"bottom_normal"] forState:UIControlStateNormal];
    [btnDown setImage:[UIImage imageNamed:@"bottom_highlighted"] forState:UIControlStateHighlighted];
    [self.view addSubview:btnDown];
    [btnDown setTag:4];
    [btnDown addTarget:self action:@selector(btnRun:) forControlEvents:UIControlEventTouchUpInside];
    
    /** 放大 */
    UIButton *btnBig = [UIButton buttonWithType:UIButtonTypeCustom];
    btnBig.frame = CGRectMake(100, 600, 50, 50);
    [btnBig setImage:[UIImage imageNamed:@"plus_normal"] forState:UIControlStateNormal];
    [btnBig setImage:[UIImage imageNamed:@"plus_highlighted"] forState:UIControlStateHighlighted];
    [self.view addSubview:btnBig];
    [btnBig setTag:1];
    [btnBig addTarget:self action:@selector(btnFiex:) forControlEvents:UIControlEventTouchUpInside];
    
    /** 縮小 */
    UIButton *btnSmall = [UIButton buttonWithType:UIButtonTypeCustom];
    btnSmall.frame = CGRectMake(285, 600, 50, 50);
    [btnSmall setImage:[UIImage imageNamed:@"minus_normal"] forState:UIControlStateNormal];
    [btnSmall setImage:[UIImage imageNamed:@"minus_highlighted"] forState:UIControlStateHighlighted];
    [self.view addSubview:btnSmall];
    [btnSmall setTag:2];
    [btnSmall addTarget:self action:@selector(btnFiex:) forControlEvents:UIControlEventTouchUpInside];
    
}

// 旋轉
- (void) btnRotate: (UIButton *) btn
{
    switch (btn.tag) {
        case 1:
            // __btnImage等同於self._btnImage
            // 負數角度爲向左旋轉角度
            // 這個方法同樣的效果：__btnImage.transform = CGAffineTransformMakeRotation(-M_PI_4);
            __btnImage.transform = CGAffineTransformRotate(__btnImage.transform, -M_PI_4);
            break;
            
        case 2:
            
            // 正數角度爲向右旋轉角度
            self._btnImage.transform = CGAffineTransformRotate(self._btnImage.transform, M_PI_4);
    }

}

// 移動
- (void) btnRun: (UIButton *) btn
{
    switch (btn.tag) {
        case 1:
            // 每次向上移動的距離
            // 這個方法同樣的效果：self._btnImage.transform = CGAffineTransformMakeTranslation(0, -30);
            self._btnImage.transform = CGAffineTransformTranslate(self._btnImage.transform, 0, -30);
            break;
        case 2:
            // 每次向左移動30的距離
            self._btnImage.transform = CGAffineTransformTranslate(self._btnImage.transform, -30, 0);
            break;
        case 3:
            // 每次向右移動30的距離
            self._btnImage.transform = CGAffineTransformTranslate(self._btnImage.transform, 30, 0);
            break;
        case 4:
            // 每次向下移動30的距離
            self._btnImage.transform = CGAffineTransformTranslate(self._btnImage.transform, 0, 30);
            break;
            
    }
}

// 放大和縮小
- (void) btnFiex:(UIButton *) btn
{
    switch (btn.tag) {
        case 1:
            // 每次放大1.5倍
            // 這個方法同樣的效果：self._btnImage.transform = CGAffineTransformMakeScale(1.5, 1.5);

            self._btnImage.transform = CGAffineTransformScale(self._btnImage.transform, 1.5, 1.5);
            break;
            
        case 2:
            // 每次縮小0.5倍
            self._btnImage.transform = CGAffineTransformScale(self._btnImage.transform, 0.5, 0.5);
            break;
    }
}



@end