BeeFramework 系列二 UISignal篇下

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 发表于 2013-7-16 14:26:31 | 只看该作者 

上篇，我们讲了UISignal的工作原理，以及BeeUIButton中的一些用法，实际上，BeeFramework框架为大部分常用组件封装了UISignal，在应用中只需要对Signal进行处理就好了，这在一定程度上减轻了代码量。 

      在实际应用中UITableView的场景可谓是无处不在，下面的例子实现了一个UITableViewCell的自定义UISignal。先看下效果图 
       <ignore_js_op> 
      点击浏览或评论触发相应事件，为了响应这样的事件，通常的做法是在UITableViewCell中采用代理的方式，在ViewController中实现Cell的协议。 
      下面看下Bee的写法

1. //
2. //  ViewController.h
3. //  BeeFrameWorkTest
4. //
5. //  Created by he songhang on 13-6-3.
6. //  Copyright (c) 2013年 he songhang. All rights reserved.
7. //
9. #import <UIKit/UIKit.h>
10. #import <BeeFramework/Bee.h>
12. @interface MyCell : UITableViewCell{
13.     UILabel *lb_content;
14.     UIButton *btn_count;
15.     UIButton *btn_comment;
16. }
18. @property(nonatomic,retain) NSDictionary *data;
20. AS_SIGNAL(COUNT)
22. AS_SIGNAL(COMMENT)
24. @end
26. @interface ViewController : UITableViewController
28. @end

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点击浏览或评论触发相应事件，为了响应这样的事件，通常的做法是在UITableViewCell中采用代理的方式，在ViewController中实现Cell的协议。 
      下面看下Bee的写法

1. //
2. //  ViewController.h
3. //  BeeFrameWorkTest
4. //
5. //  Created by he songhang on 13-6-3.
6. //  Copyright (c) 2013年 he songhang. All rights reserved.
7. //
9. #import <UIKit/UIKit.h>
10. #import <BeeFramework/Bee.h>
12. @interface MyCell : UITableViewCell{
13.     UILabel *lb_content;
14.     UIButton *btn_count;
15.     UIButton *btn_comment;
16. }
18. @property(nonatomic,retain) NSDictionary *data;
20. AS_SIGNAL(COUNT)
22. AS_SIGNAL(COMMENT)
24. @end
26. @interface ViewController : UITableViewController
28. @end

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1. //
2. //  ViewController.m
3. //  BeeFrameWorkTest
4. //
5. //  Created by he songhang on 13-6-3.
6. //  Copyright (c) 2013年 he songhang. All rights reserved.
7. //
9. #import "ViewController.h"
11. @implementation MyCell
13. DEF_SIGNAL(COUNT)
15. DEF_SIGNAL(COMMENT)
17. - (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier{
18.     self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
19.     lb_content = [[UILabel alloc]init];
20.     btn_count = [[UIButton alloc]init];
21.     btn_comment = [[UIButton alloc]init];
22.     
23.     [btn_count addTarget:self action:@selector(countBtnClicked) forControlEvents:UIControlEventTouchUpInside];
24.     [btn_comment addTarget:self action:@selector(commentBtnClicked) forControlEvents:UIControlEventTouchUpInside];
25.     [btn_count setTitleColor:[UIColor grayColor] forState:UIControlStateNormal];
26.     btn_count.titleLabel.font = [UIFont systemFontOfSize:12];
27.     [btn_comment setTitleColor:[UIColor grayColor] forState:UIControlStateNormal];
28.     btn_comment.titleLabel.font = [UIFont systemFontOfSize:12];
29.     [self.contentView addSubview:lb_content];
30.     [self.contentView addSubview:btn_comment];
31.     [self.contentView addSubview:btn_count];
32.     return self;
33. }
35. -(void)layoutSubviews{
36.     lb_content.frame = CGRectMake(10, 0, 300, 44);
37.     btn_count.frame = CGRectMake(200, 20, 50, 14);
38.     btn_comment.frame = CGRectMake(260, 20, 50, 14);
39. }
41. -(void)setData:(NSDictionary *)data{
42.     _data = data;
43.     if (data) {
44.         lb_content.text = [data stringAtPath:@"content"];
45.         [btn_count setTitle:[NSString stringWithFormat:@"浏览(%@)",[data stringAtPath:@"count"]] forState:UIControlStateNormal];
46.         [btn_comment setTitle:[NSString stringWithFormat:@"评论(%@)",[data stringAtPath:@"comment"]] forState:UIControlStateNormal];
47.     }else{
48.         lb_content.text = nil;
49.         [btn_count setTitle:nil forState:UIControlStateNormal];
50.         [btn_comment setTitle:nil forState:UIControlStateNormal];
51.     }
52. }
54. -(void)countBtnClicked{
55.     [self sendUISignal:MyCell.COUNT withObject:self.data];
56. }
58. -(void)commentBtnClicked{
59.     [self sendUISignal:MyCell.COMMENT withObject:self.data];
60. }
62. @end
64. @interface ViewController (){
65.     NSArray *datas;
66. }
68. @end
70. @implementation ViewController
72. -(void)handleUISignal_MyCell:(BeeUISignal *)signal{
73.     if ([signal is:MyCell.COUNT]) {
74.         NSDictionary *dict = (NSDictionary *)signal.object;
75.         CC(@"%@被点击",[dict stringAtPath:@"content"]);
76.     }else if ([signal is:MyCell.COMMENT]){
77.         NSDictionary *dict = (NSDictionary *)signal.object;
78.         CC(@"%@被评论",[dict stringAtPath:@"content"]);
79.     }
80. }
82. - (id)initWithStyle:(UITableViewStyle)style
83. {
84.     self = [super initWithStyle:style];
85.     if (self) {
86.         // Custom initialization
87.     }
88.     return self;
89. }
91. - (void)viewDidLoad
92. {
93.     [super viewDidLoad];
94.     NSDictionary *dict1 = [NSDictionary dictionaryWithObjectsAndKeys:@"测试数据1",@"content",@"20",@"count",@"3",@"comment", nil];
95.     NSDictionary *dict2 = [NSDictionary dictionaryWithObjectsAndKeys:@"测试数据2",@"content",@"30",@"count",@"4",@"comment", nil];
96.     NSDictionary *dict3 = [NSDictionary dictionaryWithObjectsAndKeys:@"测试数据3",@"content",@"10",@"count",@"2",@"comment", nil];
97.     datas = [[NSArray alloc]initWithObjects:dict1,dict2,dict3, nil];
98.         // Do any additional setup after loading the view, typically from a nib.
99. }
101. - (void)didReceiveMemoryWarning
102. {
103.     [super didReceiveMemoryWarning];
104.     // Dispose of any resources that can be recreated.
105. }
107. #pragma mark -UITableViewDataSource
109. - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section;{
110.     return [datas count];
111. }
113. - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath;{
114.     MyCell *cell = [tableView dequeueReusableCellWithIdentifier:@"MYCELL"];
115.     if (!cell) {
116.         cell = [[MyCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"MYCELL"];
117.     }
118.     cell.data = [datas objectAtIndex:indexPath.row];
119.     return cell;
120. }
122. @end

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在MYCell.h中通过AS_SIGNAL定义了两个静态的属性，用来自定义UISinal的名字，MYCell.m中的DEF_SIGNAL与.h中相对应。事实上，在Bee中还有很多这样类型的预定义方法，如：AS_MESSAGE 、AS_NOTIFICATION ,通过这些预定义方法，在一定程度上范规了方法的命名，通过这些预定义的属性就能知道对应的接口的调用方式。 
    在Cell中通过调用 [self sendUISignal:XXX withObject:self.data]实现了信号的传递过程。在ViewController实现规范命名的方法(见上篇），就能对信号进行响应。 

     实际上Bee已经为我们提供了一个方便布局的BeeUIGirdCell，它预定义了常见的一些方法，如数据的绑定，界面的布局等等。Bee中的BeeUITableBoard、BeeUIFlowBoard都采用GirdCell来定义布局，这里我们通过category为UITableView扩展使用BeeUIGirdCell的方法。

1. //
2. //  UITableView+BeeUIGirdCell.h
3. //
4. //  Created by he songhang on 13-4-24.
5. //  Copyright (c) 2013年 he songhang. All rights reserved.
6. //
8. #if (TARGET_OS_IPHONE || TARGET_IPHONE_SIMULATOR)
10. #import <Foundation/Foundation.h>
11. #import "Bee_UIGridCell.h"
13. @interface UITableViewCell (BeeUIGirdCell)
14. @property(nonatomic,retain) BeeUIGridCell *gridCell;
15. @end
17. @interface UITableView (BeeUIGirdCell)
18. -(UITableViewCell *) dequeueReusableCellWithBeeUIGirdCellClass:(Class) class;
19. @end
20. #endif

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1. //
2. //  UITableView+BeeUIGirdCell.m
3. //  618
4. //
5. //  Created by he songhang on 13-4-24.
6. //  Copyright (c) 2013年 he songhang. All rights reserved.
7. //
9. #import "UITableView+BeeUIGirdCell.h"
10. #import "CGRect+BeeExtension.h"
11. #import "Bee_Precompile.h"
12. #include <objc/runtime.h>
13. #import "Bee_Runtime.h"
16. @implementation UITableViewCell(BeeUIGirdCell)
18. @dynamic gridCell;
20. - (void)setFrame:(CGRect)rc
21. {
22.         [super setFrame:CGRectZeroNan(rc)];
23.     
24.         [self.gridCell setFrame:self.bounds];
25.     //        [_gridCell layoutSubcells];
26. }
28. - (void)setCenter:(CGPoint)pt
29. {
30.         [super setCenter:pt];
31.         
32.         [self.gridCell setFrame:self.bounds];
33.     //        [_gridCell layoutSubcells];
34. }
37. -(void)setGridCell:(BeeUIGridCell *)gridCell{
38.     if (!self.gridCell) {
39.         objc_setAssociatedObject( self, "UITableViewCell.gridCell", gridCell, OBJC_ASSOCIATION_RETAIN );
40. //        self.gridCell.autoresizesSubviews = YES;
41. //        self.gridCell.autoresizingMask = UIViewAutoresizingFlexibleWidth|UIViewAutoresizingFlexibleHeight;
42.         
43.         if ( gridCell.superview != self.contentView )
44.         {
45.             [gridCell.superview removeFromSuperview];
46.         }
47.         [self.contentView addSubview:gridCell];
48.         
49.         
50.     }else{
51.         if ( self.gridCell != gridCell )
52.         {
53.             [self.gridCell release];
54.             objc_setAssociatedObject( self, "UITableViewCell.gridCell", gridCell, OBJC_ASSOCIATION_RETAIN );
55. //            self.gridCell.autoresizesSubviews = YES;
56. //            self.gridCell.autoresizingMask = UIViewAutoresizingFlexibleWidth|UIViewAutoresizingFlexibleHeight;
57.             
58.             if ( gridCell.superview != self.contentView )
59.             {
60.                 [gridCell.superview removeFromSuperview];
61.             }
62.             [self.contentView addSubview:gridCell];
63.             
64.         }
65.     }
66. }
68. -(BeeUIGridCell *)gridCell{
69.     NSObject * obj = objc_getAssociatedObject( self, "UITableViewCell.gridCell" );
70.         if ( obj && [obj isKindOfClass:[BeeUIGridCell class]] )
71.                 return (BeeUIGridCell *)obj;
72.         return nil;
73. }
75. @end
78. @implementation UITableView (BeeUIGirdCell)
80. -(UITableViewCell *) dequeueReusableCellWithBeeUIGirdCellClass:(Class) clazz{
81.     UITableViewCell *cell = [self dequeueReusableCellWithIdentifier:[clazz description]];
82.     if (!cell) {
83.         cell = [[[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:[cell description]]autorelease];
84.         cell.selectionStyle = UITableViewCellSelectionStyleNone;
85.                 cell.accessoryType = UITableViewCellAccessoryNone;
86.                 cell.editingAccessoryType = UITableViewCellAccessoryNone;
87.                 cell.showsReorderControl = NO;
88.                 cell.shouldIndentWhileEditing = NO;
89.                 cell.indentationLevel = 0;
90.                 cell.indentationWidth = 0.0f;
91.                 self.alpha = 1.0f;
92.                 self.layer.masksToBounds = YES;
93.                 self.layer.opaque = YES;
94.         
95.                 cell.contentView.layer.masksToBounds = YES;
96.                 cell.contentView.layer.opaque = YES;
97.                 cell.contentView.autoresizesSubviews = YES;
98.         if ( [clazz isSubclassOfClass:[BeeUIGridCell class]] )
99.                 {
100.                         cell.gridCell = [(BeeUIGridCell *)[[BeeRuntime allocByClass:clazz] init] autorelease];
101.                 }
102.     }
103.     return cell;
104. }
106. @end

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为了下次重用这两个文件，把UITableView+BeeUIGirdCell.h和UITableView+BeeUIGirdCell.m放到Pods/BeeFramework/BeeFramework/MVC/View下，并在Pods/Headers下新建UITableView+BeeUIGirdCell.h的替身,

1. ln -s ../../BeeFramework/BeeFramework/MVC/View/UITableView+BeeUIGirdCell.h UITableView+BeeUIGirdCell.h

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我们重新实现一下ViewController

1. //
2. //  ViewController1.h
3. //  BeeFrameWorkTest
4. //
5. //  Created by he songhang on 13-6-4.
6. //  Copyright (c) 2013年 he songhang. All rights reserved.
7. //
9. #import <UIKit/UIKit.h>
11. @interface ViewController1 : UITableViewController
13. @end

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1. //
2. //  ViewController1.m
3. //  BeeFrameWorkTest
4. //
5. //  Created by he songhang on 13-6-4.
6. //  Copyright (c) 2013年 he songhang. All rights reserved.
7. //
9. #import "ViewController1.h"
10. #import <BeeFramework/UITableView+BeeUIGirdCell.h>
11. #import <BeeFramework/Bee.h>
13. @interface MYGirdCell : BeeUIGridCell{
14.     UILabel *lb_content;
15.     UIButton *btn_count;
16.     UIButton *btn_comment;
17. }
19. AS_SIGNAL(COUNT)
20. AS_SIGNAL(COMMENT)
22. @end
24. @implementation MYGirdCell
26. DEF_SIGNAL(COUNT)
28. DEF_SIGNAL(COMMENT)
30. //初始化
31. -(void)load{
32.     lb_content = [[UILabel alloc]init];
33.     btn_count = [[UIButton alloc]init];
34.     btn_comment = [[UIButton alloc]init];
35.     
36.     [btn_count addTarget:self action:@selector(countBtnClicked) forControlEvents:UIControlEventTouchUpInside];
37.     [btn_comment addTarget:self action:@selector(commentBtnClicked) forControlEvents:UIControlEventTouchUpInside];
38.     [btn_count setTitleColor:[UIColor grayColor] forState:UIControlStateNormal];
39.     btn_count.titleLabel.font = [UIFont systemFontOfSize:12];
40.     [btn_comment setTitleColor:[UIColor grayColor] forState:UIControlStateNormal];
41.     btn_comment.titleLabel.font = [UIFont systemFontOfSize:12];
42.     [self addSubview:lb_content];
43.     [self addSubview:btn_comment];
44.     [self addSubview:btn_count];
45. }
47. //释放
48. -(void)unload{
49.     
50. }
52. //数据变化时
53. - (void)dataDidChanged
54. {
55.     if (self.cellData) {
56.         NSDictionary *data = _cellData;
57.         lb_content.text = [data stringAtPath:@"content"];
58.         [btn_count setTitle:[NSString stringWithFormat:@"浏览(%@)",[data stringAtPath:@"count"]] forState:UIControlStateNormal];
59.         [btn_comment setTitle:[NSString stringWithFormat:@"评论(%@)",[data stringAtPath:@"comment"]] forState:UIControlStateNormal];
60.     }else{
61.         lb_content.text = nil;
62.         [btn_count setTitle:nil forState:UIControlStateNormal];
63.         [btn_comment setTitle:nil forState:UIControlStateNormal];
64.     }
65. }
67. //用于计算高度，可实现动态高度
68. + (CGSize)sizeInBound:(CGSize)bound forData:(NSObject *)data
69. {
70.         return bound;
71. }
73. //用于布局
74. - (void)layoutInBound:(CGSize)bound forCell:(BeeUIGridCell *)cell
75. {
76.     lb_content.frame = CGRectMake(10, 0, 300, 44);
77.     btn_count.frame = CGRectMake(200, 20, 50, 14);
78.     btn_comment.frame = CGRectMake(260, 20, 50, 14);
79. }
81. -(void)countBtnClicked{
82.     [self sendUISignal:MYGirdCell.COUNT];
83. }
85. -(void)commentBtnClicked{
86.     [self sendUISignal:MYGirdCell.COMMENT withObject:self.cellData];
87. }
89. @end
91. @interface ViewController1 (){
92.     NSArray *datas;
93. }
96. @end
98. @implementation ViewController1
100. -(void)handleUISignal_MYGirdCell:(BeeUISignal *)signal{
101.     if ([signal is:MYGirdCell.COUNT]) {
102.         MYGirdCell *cell = signal.source;
103.         NSDictionary *dict = (NSDictionary *)cell.cellData;
104.         CC(@"%@被点击",[dict stringAtPath:@"content"]);
105.     }else if ([signal is:MYGirdCell.COMMENT]){
106.         NSDictionary *dict = (NSDictionary *)signal.object;
107.         CC(@"%@被评论",[dict stringAtPath:@"content"]);
108.     }
109. }
111. - (id)initWithStyle:(UITableViewStyle)style
112. {
113.     self = [super initWithStyle:style];
114.     if (self) {
115.         // Custom initialization
116.     }
117.     return self;
118. }
120. - (void)viewDidLoad
121. {
122.     [super viewDidLoad];
123.     NSDictionary *dict1 = [NSDictionary dictionaryWithObjectsAndKeys:@"测试数据1",@"content",@"20",@"count",@"3",@"comment", nil];
124.     NSDictionary *dict2 = [NSDictionary dictionaryWithObjectsAndKeys:@"测试数据2",@"content",@"30",@"count",@"4",@"comment", nil];
125.     NSDictionary *dict3 = [NSDictionary dictionaryWithObjectsAndKeys:@"测试数据3",@"content",@"10",@"count",@"2",@"comment", nil];
126.     datas = [[NSArray alloc]initWithObjects:dict1,dict2,dict3, nil];
127.         // Do any additional setup after loading the view, typically from a nib.
128. }
130. - (void)didReceiveMemoryWarning
131. {
132.     [super didReceiveMemoryWarning];
133.     // Dispose of any resources that can be recreated.
134. }
136. #pragma mark -UITableViewDataSource
138. - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section;{
139.     return [datas count];
140. }
142. - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath;{
143.     UITableViewCell *cell = [tableView dequeueReusableCellWithBeeUIGirdCellClass:[MYGirdCell class]];
144.     cell.gridCell.cellData = [datas objectAtIndex:indexPath.row];
145.     return cell;
146. }
148. @end

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可以留意下MYGirdCell中的

1. -(void)countBtnClicked{
2.     [self sendUISignal:MYGirdCell.COUNT];
3. }
5. -(void)commentBtnClicked{
6.     [self sendUISignal:MYGirdCell.COMMENT withObject:self.cellData];
7. }

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对应于ViewController1中的

1. -(void)handleUISignal_MYGirdCell:(BeeUISignal *)signal{
2.     if ([signal is:MYGirdCell.COUNT]) {
3.         MYGirdCell *cell = signal.source;
4.         NSDictionary *dict = (NSDictionary *)cell.cellData;
5.         CC(@"%@被点击",[dict stringAtPath:@"content"]);
6.     }else if ([signal is:MYGirdCell.COMMENT]){
7.         NSDictionary *dict = (NSDictionary *)signal.object;
8.         CC(@"%@被评论",[dict stringAtPath:@"content"]);
9.     }
10. }

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本篇以UItableViewController演示了如何自定义UISignal，以及BeeUIGirdCell的用法。 
以上代码下载地址:https://github.com/ilikeido/BeeFrameworkTest/tree/master/lesson3