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 andX:60 andY: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 andX:20 andY: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 andX:60 andY: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 andX:100 andY: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 andX:180 andY: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 andX:240 andY:320];
113 // 监听点击事件
114 [minusButton addTarget:self action:@selector(scale:) forControlEvents:UIControlEventTouchUpInside];
115
116 }
117
118 #pragma mark - 实现方法
119 /** 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 */
120 - (UIButton *) createButton:(NSString *)location andTag: (int)tag andX: (CGFloat)x andY: (CGFloat)y
121 {
122 UIButton *btn = [[UIButton alloc] init];
123
124 btn.frame = CGRectMake(x, y, KMoveButton, KMoveButton);
125 // 背景
126 NSString *normal = [NSString stringWithFormat:@"%@_normal",location];
127 UIImage *upImage = [UIImage imageNamed:normal];
128 [btn setBackgroundImage:upImage forState:UIControlStateNormal];
129
130 //高亮背景
131 NSString *highlighted = [NSString stringWithFormat:@"%@_highlighted",location];
132 UIImage *upImageHighed = [UIImage imageNamed:highlighted];
133 [btn setBackgroundImage:upImageHighed forState:UIControlStateHighlighted];
134 // tag
135 btn.tag = tag;
136 [self.view addSubview:btn];
137 return btn;
138 }
139
140
141 /** 创建动画效果 */
142 - (void) makeAnimation : (void (^)())block
143 {
144 [UIView beginAnimations:nil context:nil];
145 [UIView setAnimationDuration:1.0];
146
147 block();
148
149 [UIView commitAnimations];
150 }
151
152 /** 平移方法 */
153 - (void) move : (UIButton *)button
154 {
155 [self makeAnimation:^{
156 // 创建一个临时的CGRect
157 CGRect tempFrame = self.imageView.frame;
158
159 // 判断平移方向
160 switch (button.tag) {
161 case KMoveDirTop: // 上
162 tempFrame.origin.y -= KMovingDelta;
163 // 平移不能超过手机屏幕
164 if (tempFrame.origin.y < 0) {
165 tempFrame.origin.y = 0;
166 }
167 break;
168 case KMoveDirLeft: // 左
169 tempFrame.origin.x -= KMovingDelta;
170 // 平移不能超过手机屏幕
171 if (tempFrame.origin.x < 0) {
172 tempFrame.origin.x = 0;
173 }
174 break;
175 case KMoveDirBottom: // 下
176 tempFrame.origin.y += KMovingDelta;
177 // 平移不能超过手机屏幕
178 if (tempFrame.origin.y > (self.view.frame.size.height - KImageWidth)) {
179 tempFrame.origin.y = self.view.frame.size.height -KImageWidth;
180 }
181 break;
182 case KMoveDirRight: // 右
183 tempFrame.origin.x += KMovingDelta;
184 // 平移不能超过手机屏幕
185 if (tempFrame.origin.x > (self.view.frame.size.width - KImageWidth)) {
186 tempFrame.origin.x = self.view.frame.size.width - KImageWidth;
187 }
188 break;
189 }
190
191 // 重新赋值
192 self.imageView.frame = tempFrame;
193
194 // 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
195 self.topBtn.enabled = self.imageView.frame.origin.y ? 1 : 0;
196 self.leftBtn.enabled = self.imageView.frame.origin.x ? 1 : 0;
197 self.bottomBtn.enabled = self.imageView.frame.origin.y - (self.view.frame.size.height -KImageWidth) ? 1 : 0;
198 self.rightBtn.enabled = self.imageView.frame.origin.x - (self.view.frame.size.width - KImageWidth) ? 1 : 0;
199
200 }];
201
202 }
203
204 /** 伸缩方法 */
205 - (void) scale : (UIButton *)button
206 {
207 [self makeAnimation:^{
208 // 创建临时CGRect
209 CGRect tempBounds = self.imageView.bounds;
210 // 判断放大缩小
211 if (button.tag) {
212 tempBounds.size.width *= 1.2 ;
213 tempBounds.size.height *= 1.2;
214 } else {
215 tempBounds.size.width *= 0.8;
216 tempBounds.size.height *= 0.8;
217 }
218 // 重新赋值
219 self.imageView.bounds = tempBounds;
220 }];
221 }
222
223
224 - (void)didReceiveMemoryWarning
225 {
226 [super didReceiveMemoryWarning];
227 // Dispose of any resources that can be recreated.
228 }
229
230 @end
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时间： 2024-10-09 16:13:18