纯代码transform位移伸缩和旋转

  1 //
  2 //  LWTViewController.m
  3 //  纯代码位移和伸缩作业
  4 //
  5 //  Created by apple on 14-5-20.
  6 //  Copyright (c) 2014年 lwt. All rights reserved.
  7 //
  8 
  9 #import "LWTViewController.h"
 10 #pragma mark 定义常量
 11 /** 图片距离顶部的高度 */
 12 #define KImageY 60
 13 /** 图片的尺寸 */
 14 #define KImageWidth 100
 15 /** 按钮的尺寸 */
 16 #define KMoveButton 40
 17 /** 图片平移的距离 */
 18 #define KMovingDelta 20
 19 
 20 /** 定义平移tag的枚举 */
 21 typedef enum {
 22     KMoveDirTop = 1,
 23     KMoveDirLeft,
 24     KMoveDirBottom,
 25     KMoveDirRight
 26 } KMoveDir;
 27 
 28 @interface LWTViewController ()
 29 
 30 /** 图片的属性 */
 31 @property (nonatomic, strong) UIButton *imageView;
 32 
 33 /** 平移按钮的属性 */
 34 @property (nonatomic, strong) UIButton *topBtn;
 35 @property (nonatomic, strong) UIButton *leftBtn;
 36 @property (nonatomic, strong) UIButton *bottomBtn;
 37 @property (nonatomic, strong) UIButton *rightBtn;
 38 
 39 @end
 40 
 41 @implementation LWTViewController
 42 
 43 
 44 - (void)viewDidLoad
 45 {
 46     [super viewDidLoad];
 47     // Do any additional setup after loading the view, typically from a nib.
 48     
 49     // 创建要移动的图片按钮
 50     UIButton *imageViewButton = [[UIButton alloc] init];
 51     // 按钮位置
 52     CGFloat imageX = (self.view.frame.size.width - KImageWidth) / 2;
 53     imageViewButton.frame = CGRectMake(imageX, KImageY, KImageWidth, KImageWidth);
 54     
 55     // 按钮默认背景
 56     UIImage *image = [UIImage imageNamed:@"btn_01"];
 57     [imageViewButton setBackgroundImage:image forState:UIControlStateNormal];
 58     
 59     // 按钮默认文字
 60     [imageViewButton setTitle:@"点我啊" forState:UIControlStateNormal];
 61     [imageViewButton setTitleColor:[UIColor redColor] forState:UIControlStateNormal];
 62     
 63     // 按钮高亮背景
 64     UIImage *imageHighed = [UIImage imageNamed:@"btn_02"];
 65     [imageViewButton setBackgroundImage:imageHighed forState:UIControlStateHighlighted];
 66     
 67     // 按钮高亮文字
 68     [imageViewButton setTitle:@"点我干啥" forState:UIControlStateHighlighted];
 69     [imageViewButton setTitleColor:[UIColor magentaColor] forState:UIControlStateHighlighted];
 70     
 71     [self.view addSubview:imageViewButton];
 72     
 73     _imageView = imageViewButton;
 74     
 75     // 创建移动按钮
 76     
 77     // 上
 78     UIButton *topButton = [self createButton:@"top" andTag:KMoveDirTop andPoint:CGPointMake(60, 320)];
 79     // 监听点击事件
 80     [topButton addTarget:self action:@selector(move:) forControlEvents:UIControlEventTouchUpInside];
 81     // 属性赋值
 82     self.topBtn = topButton;
 83     
 84     //左
 85     UIButton *leftButton = [self createButton:@"left" andTag:KMoveDirLeft andPoint:CGPointMake(20, 360)];
 86     // 监听点击事件
 87     [leftButton addTarget:self action:@selector(move:) forControlEvents:UIControlEventTouchUpInside];
 88     // 属性赋值
 89     self.leftBtn = leftButton;
 90     
 91     //下
 92     UIButton *bottomButton = [self createButton:@"bottom" andTag:KMoveDirBottom andPoint:CGPointMake(60, 400)];
 93     // 监听点击事件
 94     [bottomButton addTarget:self action:@selector(move:) forControlEvents:UIControlEventTouchUpInside];
 95     // 属性赋值
 96     self.bottomBtn = bottomButton;
 97     
 98     //右
 99     UIButton *rightButton = [self createButton:@"right" andTag:KMoveDirRight andPoint:CGPointMake(100, 360)];
100     // 监听点击事件
101     [rightButton addTarget:self action:@selector(move:) forControlEvents:UIControlEventTouchUpInside];
102     // 属性赋值
103     self.rightBtn = rightButton;
104     
105     // 创建伸缩按钮
106     // 放大
107     UIButton *plusButton = [self createButton:@"plus" andTag:1 andPoint:CGPointMake(180, 320)];
108     // 监听点击事件
109     [plusButton addTarget:self action:@selector(scale:) forControlEvents:UIControlEventTouchUpInside];
110     
111     // 缩小
112     UIButton *minusButton = [self createButton:@"minus" andTag:0 andPoint:CGPointMake(240, 320)];
113     // 监听点击事件
114     [minusButton addTarget:self action:@selector(scale:) forControlEvents:UIControlEventTouchUpInside];
115     
116     // 创建旋转按钮
117     //逆时针
118     UIButton *leftRotateButton = [self createButton:@"left_rotate" andTag:-1 andPoint:CGPointMake(180, 400)];
119     // 监听点击事件
120     [leftRotateButton addTarget:self action:@selector(rotate:) forControlEvents:UIControlEventTouchUpInside];
121     
122     //顺时针
123     UIButton *rightRotateButton = [self createButton:@"right_rotate" andTag:1 andPoint:CGPointMake(240, 400)];
124     // 监听点击事件
125     [rightRotateButton addTarget:self action:@selector(rotate:) forControlEvents:UIControlEventTouchUpInside];
126     
127 }
128 
129 #pragma mark - 实现方法
130 /** 创建按钮 默认和高亮的图片名称相近，x，y是位置是手动布局的 */
131 - (UIButton *) createButton:(NSString *)location andTag: (int)tag andPoint : (CGPoint)point
132 {
133     UIButton *btn = [[UIButton alloc] init];
134     
135     btn.frame = (CGRect){point,KMoveButton, KMoveButton};
136     // 背景
137     NSString *normal = [NSString stringWithFormat:@"%@_normal",location];
138     UIImage *upImage = [UIImage imageNamed:normal];
139     [btn setBackgroundImage:upImage forState:UIControlStateNormal];
140     
141     //高亮背景
142     NSString *highlighted = [NSString stringWithFormat:@"%@_highlighted",location];
143     UIImage *upImageHighed = [UIImage imageNamed:highlighted];
144     [btn setBackgroundImage:upImageHighed forState:UIControlStateHighlighted];
145     // tag
146     btn.tag = tag;
147     [self.view addSubview:btn];
148     return btn;
149 }
150 
151 
152 /** 创建动画效果 */
153 - (void) makeAnimation : (void (^)())block
154 {
155     [UIView beginAnimations:nil context:nil];
156     [UIView setAnimationDuration:1.0];
157     
158     block();
159     
160     [UIView commitAnimations];
161 }
162 
163 /** 平移方法 */
164 - (void) move : (UIButton *)button
165 {
166     [self makeAnimation:^{
167         
168         // 判断平移方向
169         switch (button.tag) {
170             case KMoveDirTop: // 上
171                 
172                 self.imageView.transform = CGAffineTransformTranslate(self.imageView.transform, 0, -KMovingDelta);
173                 //                // 不能超过屏幕
174                 //                if (self.imageView.frame.origin.y < 0) {
175                 //                    CGRect tempFrame = self.imageView.frame;
176                 //                    tempFrame.origin.y = 0;
177                 //                    self.imageView.frame = tempFrame;
178                 //                }
179                 break;
180             case KMoveDirLeft: // 左
181                 
182                 self.imageView.transform = CGAffineTransformTranslate(self.imageView.transform, -KMovingDelta, 0);
183                 //                // 不能超过屏幕
184                 //                if (self.imageView.frame.origin.x < 0) {
185                 //                    CGRect tempFrame = self.imageView.frame;
186                 //                    tempFrame.origin.x = 0;
187                 //                    self.imageView.frame = tempFrame;
188                 //                }
189                 break;
190             case KMoveDirBottom: // 下
191                 
192                 self.imageView.transform = CGAffineTransformTranslate(self.imageView.transform, 0, KMovingDelta);
193                 //                // 不能超过屏幕
194                 //                if (self.imageView.frame.origin.y > (self.view.frame.size.height -KImageWidth)) {
195                 //                    CGRect tempFrame = self.imageView.frame;
196                 //                    tempFrame.origin.y = self.view.frame.size.height -KImageWidth;
197                 //                    self.imageView.frame = tempFrame;
198                 //                }
199                 break;
200             case KMoveDirRight: // 右
201                 
202                 self.imageView.transform = CGAffineTransformTranslate(self.imageView.transform, KMovingDelta, 0);
203                 //                // 不能超过屏幕
204                 //                if (self.imageView.frame.origin.x > (self.view.frame.size.width - KImageWidth)) {
205                 //                    CGRect tempFrame = self.imageView.frame;
206                 //                    tempFrame.origin.x = self.view.frame.size.width - KImageWidth;
207                 //                    self.imageView.frame = tempFrame;
208                 //                }
209                 break;
210         }
211         
212         //        // 平移到与屏幕重合则无法点击按钮 不用三目运算符则会出现一直无法点击事件
213         //        self.topBtn.enabled = self.imageView.frame.origin.y ? 1 : 0;
214         //        self.leftBtn.enabled = self.imageView.frame.origin.x ? 1 : 0;
215         //        self.bottomBtn.enabled = self.imageView.frame.origin.y - (self.view.frame.size.height -KImageWidth) ? 1 : 0;
216         //        self.rightBtn.enabled = self.imageView.frame.origin.x - (self.view.frame.size.width - KImageWidth) ? 1 : 0;
217         
218     }];
219     
220 }
221 
222 /** 伸缩方法 */
223 - (void) scale : (UIButton *)button
224 {
225     [self makeAnimation:^{
226         // 判断放大缩小
227         CGFloat scale = button.tag ? 1.2 : 0.8;
228         
229         self.imageView.transform = CGAffineTransformScale(self.imageView.transform, scale, scale);
230     }];
231 }
232 
233 /** 旋转方法 */
234 - (void) rotate : (UIButton *)button
235 {
236     [self makeAnimation:^{
237         CGFloat rotate = M_PI_4 * button.tag;
238         self.imageView.transform = CGAffineTransformRotate(self.imageView.transform, rotate);
239     }];
240     
241 }
242 
243 
244 - (void)didReceiveMemoryWarning
245 {
246     [super didReceiveMemoryWarning];
247     // Dispose of any resources that can be recreated.
248 }
249 
250 @end