GMCategaryScrollBar.m
11.9 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
//
// GMScrollBar.m
// GomeEShop
//
// Created by tangli on 15/3/23.
// Copyright (c) 2015年 Gome. All rights reserved.
//
#import "GMCategaryScrollBar.h"
#import "GMCategaryBar.h"
@interface GMCategaryScrollBar()
<
UIScrollViewDelegate,
GMCategaryBarDelegate
>
@property (nonatomic, weak) GMCategaryBar *categaryBar; // 分类选项卡
@property (nonatomic, assign) CGFloat fltControllerW; // 每个控制器的宽度
@property (nonatomic, assign) BOOL isShowCategaryBar; // 是否显示categaryBar的一个开关
@property (nonatomic, assign) BOOL isCanScroll; // 是否支持scrollView的滚动
@property (nonatomic, strong) NSMutableArray *maryTitle; // 分类选项卡中的文字数组
@property (nonatomic, assign) NSInteger intIndex; // 纪录上一个分类按钮的索引
@end
@implementation GMCategaryScrollBar
- (instancetype)initWithFrame:(CGRect)frame
{
if (self = [super initWithFrame:frame])
{
_isShowCategaryBar = YES;
// 创建scrollView
UIScrollView *scrv = [[UIScrollView alloc]init];
[scrv setScrollsToTop:NO];
CGFloat fltScrollViewY = (_isShowCategaryBar) ? (CATEGARYBAR_H) : (0);
scrv.frame = CGRectMake(0,
fltScrollViewY,
self.frame.size.width,
self.frame.size.height - fltScrollViewY);
_fltControllerW = scrv.frame.size.width;
_fltControllerH = scrv.frame.size.height;
scrv.delegate = self; // 设置scrollView的代理
// 隐藏水平方向的滚动条
scrv.showsHorizontalScrollIndicator = NO;
// 隐藏竖直方向的滚动条
scrv.showsVerticalScrollIndicator = NO;
// 取消弹簧效果
scrv.bounces =YES;
//增加上中左右额外的区域
scrv.contentInset =UIEdgeInsetsMake(0, 0, 0, 0);
scrv.pagingEnabled = YES;
_scrv = scrv;
[self addSubview:scrv];
}
return self;
}
// 类创建方法
+ (instancetype)categaryScrollBar
{
return [[self alloc]initWithFrame:CGRectMake(0,
0,
screenW,
screenH - GMK_NavBar_H)];
}
// 控制器数组的set方法
- (void)setMaryVC:(NSMutableArray *)maryVC
{
_maryVC = maryVC;
if (maryVC.count == 0 || maryVC.count == 1)
{
_isShowCategaryBar = NO;
CGFloat fltScrollViewY = _isShowCategaryBar?CATEGARYBAR_H:0;
_fltControllerH = self.frame.size.height - fltScrollViewY;
_scrv.frame = CGRectMake(0, fltScrollViewY, screenW, _fltControllerH);
}
else
{
_isShowCategaryBar = YES;
}
if (maryVC.count > 0)
{
UIViewController<GMCategaryScrollBarDelegate> *vc = _maryVC[0];
vc.view.frame = CGRectMake(0, 0, _fltControllerW, _scrv.frame.size.height);
[_scrv addSubview:vc.view];
// 设置第一个控制器为代理
_delegate = vc;
// 设置categaryBar的内容尺寸
_scrv.contentSize = CGSizeMake(_fltControllerW * _maryVC.count, 0);
}
}
- (void)categaryBarTitle:(NSArray *)aryTitle withIsEqualBtn:(BOOL)isEqualBtn
{
_maryTitle = [NSMutableArray arrayWithArray:aryTitle];
if (aryTitle.count == 0 || aryTitle.count == 1)
{
_isShowCategaryBar = NO;
CGFloat fltScrollViewY = _isShowCategaryBar?CATEGARYBAR_H:0;
_fltControllerH = self.frame.size.height - fltScrollViewY;
_scrv.frame = CGRectMake(0, fltScrollViewY, screenW, self.frame.size.height - fltScrollViewY);
}
else
{
_isShowCategaryBar = YES;
}
[self categaryBar:isEqualBtn];
}
// UIView数组的set方法
- (void)setMaryView:(NSMutableArray *)maryView
{
_maryView = maryView;
if (maryView.count == 0 || maryView.count == 1)
{
_isShowCategaryBar = NO;
CGFloat fltScrollViewY = (_isShowCategaryBar) ? (CATEGARYBAR_H) : (0);
_fltControllerH = self.frame.size.height - fltScrollViewY;
_scrv.frame = CGRectMake(0, fltScrollViewY, screenW, screenH - fltScrollViewY);
}
else
{
_isShowCategaryBar = YES;
}
if (_maryView.count > 0)
{
UIView *view = _maryView[0];
view.frame = CGRectMake(0, 0, _fltControllerW, _scrv.frame.size.height);
[_scrv addSubview:view];
// 设置categaryBar的内容尺寸
_scrv.contentSize = CGSizeMake(_fltControllerW * _maryView.count, 0);
}
}
// 是否显示categaryBar的一个开关
- (void)categaryBarShow:(BOOL)isShowCategaryBar
{
_isShowCategaryBar = isShowCategaryBar;
if (_isShowCategaryBar == NO)
{
CGFloat fltScrollViewY = (_isShowCategaryBar) ? (CATEGARYBAR_H) : (0);
_fltControllerH = self.frame.size.height - fltScrollViewY;
_scrv.frame = CGRectMake(0, fltScrollViewY, screenW, self.frame.size.height - fltScrollViewY);
}
}
// 是否支持scrollView的滚动
- (void)scrollBarScroll:(BOOL)isCanScroll
{
_isCanScroll = isCanScroll;
if (_isCanScroll == NO)
{
_scrv.scrollEnabled = NO;
}
}
// 创建分类bar
- (void)categaryBar:(BOOL)isEqualBtn
{
if (_categaryBar == nil)
{
GMCategaryBar *categaryBar = [GMCategaryBar categaryBarWithArrayTitle:self.maryTitle
dividerIsEqualBtnW:isEqualBtn];
categaryBar.frame = CGRectMake(0, 0, screenW, CATEGARYBAR_H);
categaryBar.delegateCategary = self;
_categaryBar = categaryBar;
[self addSubview:categaryBar];
}
}
#pragma mark - 代理GMCategaryBarDelegate
- (void)categaryBarOptionalDelegate:(GMCategaryBar *)categaryBar withBtnIndex:(NSInteger)intIndex
{
CGFloat offsetX = intIndex * _fltControllerW;
// 自动滑动categaryBar的相应的距离
[_scrv setContentOffset:CGPointMake(offsetX, 0) animated:YES];
}
#pragma mark - 代理UIScrollViewDelegate
- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
if ([scrollView isEqual:_scrv])
{
NSInteger intIndex = floor(scrollView.contentOffset.x / scrollView.frame.size.width + 0.5);
[_categaryBar automaticScrollDivider:intIndex];
}
}
- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
{
if (_intIndex == floor(scrollView.contentOffset.x / scrollView.frame.size.width))
{
return;
}
if ([scrollView isEqual:_scrv])
{
if ([_delegate respondsToSelector:@selector(categaryScrollBarDelegateScrollVCShangYiGe)])
{
[_delegate categaryScrollBarDelegateScrollVCShangYiGe];
}
_intIndex = floor(scrollView.contentOffset.x / scrollView.frame.size.width);
if (_maryVC.count != 0)
{
// 如果代理存在，则清除
if (_delegate)
{
_delegate = nil;
}
// 根据索引创建对应的控制器
if (_intIndex < 0) {
_intIndex = 0;
}
UIViewController<GMCategaryScrollBarDelegate> *vc = _maryVC[_intIndex];
_delegate = vc;
if ([_scrv.subviews containsObject:vc.view]) // 第一次进入控制器时不调用代理方法
{
// 当滚动到控制器或当前View时的代理
if ([_delegate respondsToSelector:@selector(categaryScrollBarDelegateScrollVC:withIndex:)])
{
[_delegate categaryScrollBarDelegateScrollVC:self withIndex:_intIndex];
}
}
else if(_isReponseDelegate) /// 如果第一次需要实现代理
{
// 当滚动到控制器或当前View时的代理
if ([_delegate respondsToSelector:@selector(categaryScrollBarDelegateScrollVC:withIndex:)])
{
[_delegate categaryScrollBarDelegateScrollVC:self withIndex:_intIndex];
}
}
// 根据索引创建对应的控制器并添加到scrollView中
[self createVC:_intIndex];
}
if (_maryView != 0)
{
// 当滚动到控制器或当前View时的代理
if ([_delegate respondsToSelector:@selector(categaryScrollBarDelegateScrollVC:withIndex:)])
{
[_delegate categaryScrollBarDelegateScrollVC:self withIndex:_intIndex];
}
// 根据索引创建对应的UIView并添加到scrollView中
[self createView:_intIndex];
}
}
}
// 根据索引创建对应的控制器并添加到scrollView中
- (void)createVC:(NSInteger)intIndex
{
// 根据索引创建对应的控制器
UIViewController *vc = _maryVC[intIndex];
if (![_scrv.subviews containsObject:vc.view])
{
vc.view.frame = CGRectMake(_fltControllerW * intIndex, 0, _fltControllerW, _fltControllerH);
[_scrv addSubview:vc.view];
}
}
// 根据索引创建对应的UIView并添加到scrollView中
- (void)createView:(NSInteger)intIndex
{
// 根据索引创建对应的控制器
UIView *view = _maryView[intIndex];
if (![_scrv.subviews containsObject:view])
{
view.frame = CGRectMake(_fltControllerW * intIndex, 0, _fltControllerW, _fltControllerH);
[_scrv addSubview:view];
}
}
- (void)scrollViewDidEndScrollingAnimation:(UIScrollView *)scrollView
{
if (_intIndex == floor(scrollView.contentOffset.x / scrollView.frame.size.width))
{
return;
}
_intIndex = (NSInteger)(scrollView.contentOffset.x / scrollView.frame.size.width);
if (_maryVC.count != 0)
{
if ([_delegate respondsToSelector:@selector(categaryScrollBarDelegateScrollVCShangYiGe)])
{
[_delegate categaryScrollBarDelegateScrollVCShangYiGe];
}
// 如果代理存在，则清除
if (_delegate)
{
_delegate = nil;
}
// 根据索引创建对应的控制器
UIViewController<GMCategaryScrollBarDelegate> *vc = _maryVC[_intIndex];
_delegate = vc;
if ([_scrv.subviews containsObject:vc.view]) // 第一次进入控制器时不调用代理方法
{
// 当滚动到控制器或当前View时的代理
if ([_delegate respondsToSelector:@selector(categaryScrollBarDelegateScrollVC:withIndex:)])
{
[_delegate categaryScrollBarDelegateScrollVC:self withIndex:_intIndex];
}
}
else if(_isReponseDelegate) /// 如果第一次需要实现代理
{
// 当滚动到控制器或当前View时的代理
if ([_delegate respondsToSelector:@selector(categaryScrollBarDelegateScrollVC:withIndex:)])
{
[_delegate categaryScrollBarDelegateScrollVC:self withIndex:_intIndex];
}
}
// 根据索引创建对应的控制器并添加到scrollView中
[self createVC:_intIndex];
}
if (_maryView != 0)
{
// 当滚动到控制器或当前View时的代理
if ([_delegate respondsToSelector:@selector(categaryScrollBarDelegateScrollVC:withIndex:)])
{
[_delegate categaryScrollBarDelegateScrollVC:self withIndex:_intIndex];
}
// 根据索引创建对应的UIView并添加到scrollView中
[self createView:_intIndex];
}
}
// 提供一个接口，使上面的分类框和下面的View自动滚动到相应的索引位置
- (void)automaticScroll:(NSInteger)intIndex
{
CGFloat offsetX = intIndex * screenW;
// 自动滑动categaryBar的相应的距离
[_scrv setContentOffset:CGPointMake(offsetX, 0) animated:YES];
[_categaryBar automaticScrollDivider:intIndex];
}
@end