UIScrollVIew 滚动视图内容总结

Posted 2020-07-21

  1 - (void)viewDidLoad
  2 
  3 {
  4 
  5     [super viewDidLoad];
  6 
  7     // Do any additional setup after loading the view.
  8 
  9     
 10 
 11     // 滚动视图
 12 
 13     UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(20, 20, 280, 440)];
 14 
 15     scrollView.backgroundColor = [UIColor redColor];
 16 
 17     
 18 
 19     // 设定滚动内容的范围（CGSize）
 20 
 21     scrollView.contentSize = CGSizeMake(2800, 0);  // 横纵 坐标
 22 
 23     // 关掉边缘的弹动搞效果
 24 
 25 //    srollView.bounces = NO;
 26 
 27     // 偏移量(CGPoint)
 28 
 29 //    srollView.contentOffset = CGPointMake(-100, -100);
 30 
 31     // 内容距离上 左 下 右边缘的距离
 32 
 33     scrollView.contentInset = UIEdgeInsetsMake(0, 0, 0, 0);
 34 
 35     // 滑动到顶部
 36 
 37     scrollView.scrollsToTop = YES;
 38 
 39     // 整屏翻动
 40 
 41     scrollView.pagingEnabled = YES;
 42 
 43     // srollView能不能滚动
 44 
 45     scrollView .scrollEnabled = YES; // NO：不能滚动
 46 
 47     // 是否显示横向的滚动条
 48 
 49     scrollView.showsHorizontalScrollIndicator = YES;
 50 
 51     
 52 
 53     
 54 
 55     
 56 
 57     // 2.将viewController设置为ScrollView的 代理人
 58 
 59     scrollView.delegate = self;
 60 
 61     
 62 
 63     
 64 
 65     // scrollView的缩放
 66 
 67     // 缩放：1. 设置scrollView的缩放范围
 68 
 69     scrollView.minimumZoomScale = 0.5; // 最小范围
 70 
 71     scrollView.maximumZoomScale = 2;   // 最大范围
 72 
 73     
 74 
 75     // 设置缩放时是否弹动
 76 
 77     scrollView.bouncesZoom = YES;
 78 
 79     
 80 
 81     [self.view addSubview:scrollView];
 82 
 83     [scrollView release];
 84 
 85     
 86 
 87     
 88 
 89     UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(20, 20, 240, 400)];
 90 
 91     imageView.image = [UIImage imageNamed:@"1.JPG"];
 92 
 93     [scrollView addSubview:imageView];
 94 
 95     [imageView release];
 96 
 97     
 98 
 99     UIImageView *imageView0 = [[UIImageView alloc] initWithFrame:CGRectMake(300, 20, 240, 400)];
100 
101     imageView0.image = [UIImage imageNamed:@"2.JPG"];
102 
103     [scrollView addSubview:imageView0];
104 
105     [imageView0 release];
106 
107     
108 
109     UIImageView *imageView1 = [[UIImageView alloc] initWithFrame:CGRectMake(580, 20, 240, 400)];
110 
111     imageView1.image = [UIImage imageNamed:@"3.JPG"];
112 
113     [scrollView addSubview:imageView1];
114 
115     [imageView1 release];
116 
117     
118 
119     UIImageView *imageView2 = [[UIImageView alloc] initWithFrame:CGRectMake(580, 20, 240, 400)];
120 
121     imageView2.image = [UIImage imageNamed:@"4.JPG"];
122 
123     [scrollView addSubview:imageView2];
124 
125     [imageView2 release];
126 
127     
128 
129     UIImageView *imageView3 = [[UIImageView alloc] initWithFrame:CGRectMake(860, 20, 240, 400)];
130 
131     imageView3.image = [UIImage imageNamed:@"5.JPG"];
132 
133     [scrollView addSubview:imageView3];
134 
135     [imageView3 release];
136 
137     
138 
139     UIImageView *imageView4 = [[UIImageView alloc] initWithFrame:CGRectMake(1140, 20, 240, 400)];
140 
141     imageView4.image = [UIImage imageNamed:@"6.JPG"];
142 
143     [scrollView addSubview:imageView4];
144 
145     [imageView4 release];
146 
147     
148 
149 //    UIImageView *imageView5 = [[UIImageView alloc] initWithFrame:CGRectMake(1420, 20, 240, 400)];
150 
151 //    
152 
153 //    [scrollView addSubview:imageView5];
154 
155 //    [imageView5 release];
156 
157  
158 
159     
160 
161 
162     
163 
164     UIPageControl *pageControl = [[UIPageControl alloc] initWithFrame:CGRectMake(20, 420, 280, 62)];
165 
166 //    pageControl.backgroundColor =[UIColor clearColor];
167 
168     
169 
170     // 显示多少个点点
171 
172     pageControl.numberOfPages = 5;
173 
174     pageControl.currentPageIndicatorTintColor = [UIColor blackColor];
175 
176     
177 
178     // 给pageControl加一个响应方法
179 
180     [pageControl addTarget:self action:@selector(pageControlAction:)forControlEvents:UIControlEventValueChanged];
181 
182     
183 
184     [self.view addSubview:pageControl];
185 
186     [pageControl release];
187 
188     
189 
190     
191 
192     // 方便在其他方法中调用pageControl
193 
194     self.page = pageControl;
195 
196 }
197 
198 
199 - (void)pageControlAction:(UIPageControl *)pageControl
200 
201 {
202 
203     NSLog(@"%d", pageControl.currentPage);
204 
205 }
206 
207 //  缩放：2. 设置一个视图 随着scrollView放大缩小
208 
209 - (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView
210 
211 {
212 
213     return [scrollView.subviews firstObject]; // 把第一个子视图随着scrollView缩放
214 
215 }
216 
217 // 3. 实现相对应的代理方法（协议方法）
218 
219 - (void)scrollViewDidSroll:(UIScrollView *)scrollView
220 
221 {
222 
223 //    // 只要srollView滚动 就会一直触发这个方法
224 
225 //    NSLog(@"%s", __FUNCTION__);
226 
227 //    // srollView 的偏移量变化
228 
229 //    NSLog(@"偏移量变化: %@", NSStringFromCGPoint(scrollView.contentOffset));
230 
231 //    
232 
233 //    // 判断scrollView当前的页数
234 
235 //    // 偏移量.x / srollView宽度
236 
237 //    int pageNumber = scrollView.contentOffset.x / scrollView.frame.size.width;
238 
239 //    NSLog(@"页数: %d", pageNumber);
240 
241     
242 
243     // 当前scrollView滚动到当前页数
244 
245     self.page.currentPage = scrollView.contentOffset.x / scrollView.frame.size.width;
246 
247     
248 
249 }
250 
251 // 开始拖拽的时候
252 
253 - (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView
254 
255 {
256 
257     NSLog(@"开始拖拽:%s", __FUNCTION__);
258 
259 }
260 
261 // 结束拖拽的时候
262 
263 - (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate
264 
265 {
266 
267     NSLog(@"结束拖拽:%s", __FUNCTION__);
268 
269 }
270 
271 // 开始减速的时候
272 
273 - (void)scrollViewWillBeginDecelerating:(UIScrollView *)scrollView
274 
275 {
276 
277     NSLog(@"开始减速:%s", __FUNCTION__);
278 
279 }
280 
281 // 结束减速的时候
282 
283 - (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
284 
285 {
286 
287     NSLog(@"结束减速:%s", __FUNCTION__);
288 
289 }