[iOS基础控件 - 6.7.1] 微博展示 代码

 1 //
 2 //  ViewController.m
 3 //  Weibo
 4 //
 5 //  Created by hellovoidworld on 14/12/4.
 6 //  Copyright (c) 2014年 hellovoidworld. All rights reserved.
 7 //
 8 
 9 #import "ViewController.h"
10 #import "Weibo.h"
11 #import "WeiboCell.h"
12 #import "WeiboFrame.h"
13 
14 @interface ViewController ()
15 
16 /** 微博数组，类型是WeiboFrame，包含了数据和位置尺寸信息 */
17 @property(nonatomic, strong) NSArray *weibos;
18 
19 @end
20 
21 @implementation ViewController
22 
23 - (void)viewDidLoad {
24     [super viewDidLoad];
25     // Do any additional setup after loading the view, typically from a nib.
26 }
27 
28 - (void)didReceiveMemoryWarning {
29     [super didReceiveMemoryWarning];
30     // Dispose of any resources that can be recreated.
31 }
32 
33 // 屏蔽状态栏
34 - (BOOL)prefersStatusBarHidden {
35     return YES;
36 }
37 
38 #pragma mark -  数据源操作
39 - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
40     return self.weibos.count;
41 }
42 
43 - (UITableViewCell *) tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
44     // 传入tableView是为了使用cell缓存池
45     WeiboCell *cell = [WeiboCell cellWithTableView:self.tableView];
46    
47     // 传入微博的数据和位置尺寸信息
48     cell.weiboFrame = self.weibos[indexPath.row];
49    
50     return cell;
51 }
52 
53 
54 #pragma mark - 加载数据
55 // 延迟加载plist文件中的数据为微博数组
56 - (NSArray *) weibos {
57     if (nil == _weibos) {
58         NSArray *dictArray = [NSArray arrayWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"weibo.plist" ofType:nil]];
59        
60         NSMutableArray *mdictArray = [NSMutableArray array];
61         for (NSDictionary *dict in dictArray) {
62             WeiboFrame *weiboFrame = [[WeiboFrame alloc] init];
63             Weibo *weibo = [Weibo weiboWithDictionary:dict];
64            
65             // 传入weibo模型数据到frame模型，内部保存数据，计算各个控件的位置、尺寸
66             weiboFrame.weibo = weibo;
67            
68             [mdictArray addObject:weiboFrame];
69         }
70        
71         _weibos = mdictArray;
72     }
73    
74     return _weibos;
75 }
76 
77 
78 #pragma mark - 代理操作
79 // 动态调整每个cell的高度
80 - (CGFloat) tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
81     WeiboFrame *weiboFrame = self.weibos[indexPath.row];
82     return weiboFrame.cellHeight;
83 }
84 
85 @end

 1 //
 2 //  WeiboCell.h
 3 //  Weibo
 4 //
 5 //  Created by hellovoidworld on 14/12/5.
 6 //  Copyright (c) 2014年 hellovoidworld. All rights reserved.
 7 //
 8 
 9 // 用于装载每个TabelViewCell的model
10 #import <UIKit/UIKit.h>
11 
12 @class WeiboFrame;
13 @interface WeiboCell : UITableViewCell
14 
15 // 微博frame，内持有微博数据和尺寸、位置信息
16 @property(nonatomic, strong) WeiboFrame *weiboFrame;
17 
18 
19 // 自定义带有父控件tableView初始化方法
20 + (instancetype) cellWithTableView:(UITableView *) tableView;
21 
22 @end

  1 //
  2 //  WeiboCell.m
  3 //  Weibo
  4 //
  5 //  Created by hellovoidworld on 14/12/5.
  6 //  Copyright (c) 2014年 hellovoidworld. All rights reserved.
  7 //
  8 
  9 #import "WeiboCell.h"
 10 #import "WeiboFrame.h"
 11 #import "Weibo.h"
 12 
 13 // 昵称字体
 14 #define NAME_FONT [UIFont systemFontOfSize:14]
 15 // 博文字体
 16 #define TEXT_FONT [UIFont systemFontOfSize:15]
 17 
 18 
 19 @interface WeiboCell()
 20 
 21 // 创建各个子控件的成员，用来分离数据赋值和尺寸、位置调整
 22 /** 头像 */
 23 @property(nonatomic, weak) UIImageView *iconView;
 24 
 25 /** 昵称 */
 26 @property(nonatomic, weak) UILabel *nameView;
 27 
 28 /** vip标志 */
 29 @property(nonatomic, weak) UIImageView *vipView;
 30 
 31 /** 博文 */
 32 @property(nonatomic, weak) UILabel *textView;
 33 
 34 /** 配图 */
 35 @property(nonatomic, weak) UIImageView *pictureView;
 36 
 37 @end
 38 
 39 @implementation WeiboCell
 40 
 41 - (void)awakeFromNib {
 42     // Initialization code
 43 }
 44 
 45 - (void)setSelected:(BOOL)selected animated:(BOOL)animated {
 46     [super setSelected:selected animated:animated];
 47 
 48     // Configure the view for the selected state
 49 }
 50 
 51 #pragma mark - 初始化
 52 // 自定义带有父控件tableView初始化方法
 53 + (instancetype) cellWithTableView:(UITableView *) tableView {
 54     static NSString *ID = @"weibo";
 55    
 56     // 从缓存池寻找
 57     WeiboCell *cell = [tableView dequeueReusableCellWithIdentifier:ID];
 58    
 59     // 使用重写的构造方法初始化
 60     if (nil == cell) {
 61         cell = [[WeiboCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:ID];
 62     }
 63    
 64     return  cell;
 65 }
 66 
 67 // 重写缓存池初始化方法，加入各个子控件，可以设置静态数据，但是没有动态的数据和位置尺寸信息
 68 - (instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier {
 69     if (self = [super initWithStyle:style reuseIdentifier:reuseIdentifier]) {
 70         // 1.头像
 71         /**
 72             由于self.iconView是weak类型,不能写成:
 73             self.iconView = [[UIImageView alloc] init];
 74             会被立即释放，不能正常赋值，下同
 75          */
 76         UIImageView *iconView = [[UIImageView alloc] init];
 77         [self addSubview:iconView];
 78         self.iconView = iconView;
 79        
 80         // 2.昵称
 81         UILabel *nameView = [[UILabel alloc] init];
 82         // 指定字体用来计算占用的尺寸大小
 83         nameView.font = NAME_FONT;
 84         [self addSubview:nameView];
 85         self.nameView = nameView;
 86        
 87         // 3.vip标志
 88         UIImageView *vipView = [[UIImageView alloc] init];
 89         vipView.image = [UIImage imageNamed:@"vip"];
 90         [self addSubview:vipView];
 91         self.vipView = vipView;
 92        
 93         // 4.博文
 94         UILabel *textView = [[UILabel alloc] init];
 95         textView.font = TEXT_FONT;
 96         textView.numberOfLines = 0;// 设置自动换行
 97         [self addSubview:textView];
 98         self.textView = textView;
 99        
100         // 5.配图
101         UIImageView *pictureView = [[UIImageView alloc] init];
102         [self addSubview:pictureView];
103         self.pictureView = pictureView;
104     }
105    
106     return self;
107 }
108 
109 #pragma mark - 数据加载
110 // 加载数据的时候设置数据和尺寸、位置
111 - (void)setWeiboFrame:(WeiboFrame *)weiboFrame {
112     _weiboFrame = weiboFrame;
113    
114     // 1.设置数据
115     [self calWeiboData];
116    
117     // 2.设置尺寸、位置
118     [self calWeiboFrame];
119 }
120 
121 // 设置数据
122 - (void) calWeiboData {
123     Weibo *weibo = self.weiboFrame.weibo;
124    
125     // 1.头像
126     self.iconView.image = [UIImage imageNamed:weibo.icon];
127    
128     // 2.昵称
129     self.nameView.text = weibo.name;
130    
131     // 3.vip标志
132     if (weibo.vip) {
133         self.vipView.hidden = NO;
134     }
135     else {
136         self.vipView.hidden = YES;
137     }
138    
139     // 4.博文
140     self.textView.text = weibo.text;
141 
142    
143     // 5.配图
144     if (weibo.picture) {
145         self.pictureView.hidden = NO;
146         self.pictureView.image = [UIImage imageNamed:weibo.picture];
147     }
148     else {
149         self.pictureView.hidden = YES;
150         self.pictureView.image = nil;
151     }
152 }
153 
154 // 设置位置、尺寸
155 - (void) calWeiboFrame {
156     // 1.头像
157     self.iconView.frame = self.weiboFrame.iconFrame;
158    
159     // 2.昵称
160     self.nameView.frame = self.weiboFrame.nameFrame;
161    
162     // 3.vip标志
163     self.vipView.frame = self.weiboFrame.vipFrame;
164    
165     // 4.博文
166     self.textView.frame = self.weiboFrame.textFrame;
167    
168     // 5.配图
169     if (self.weiboFrame.weibo.picture) {
170         self.pictureView.frame = self.weiboFrame.pictureFrame;
171     }
172 }
173 
174 
175 @end

 1 //
 2 //  Weibo.h
 3 //  Weibo
 4 //
 5 //  Created by hellovoidworld on 14/12/5.
 6 //  Copyright (c) 2014年 hellovoidworld. All rights reserved.
 7 //
 8 
 9 // 装在微博数据的model
10 #import <Foundation/Foundation.h>
11 
12 @interface Weibo : NSObject
13 
14 #pragma mark - 成员变量
15 /** 头像 */
16 @property(nonatomic, copy) NSString *icon;
17 
18 /** 昵称 */
19 @property(nonatomic, copy) NSString *name;
20 
21 /** vip标志 */
22 @property(nonatomic, assign) BOOL vip;
23 
24 /** 博文 */
25 @property(nonatomic, copy) NSString *text;
26 
27 /** 配图 */
28 @property(nonatomic, copy) NSString *picture;
29 
30 
31 #pragma mark - 自定义初始化方法
32 /** 使用字典赋值成员 */
33 - (instancetype) initWithDictionary:(NSDictionary *) dictionary;
34 
35 /** 使用字典赋值成员 */
36 + (instancetype) weiboWithDictionary:(NSDictionary *) dictionary;
37 
38 /** 返回空的model */
39 + (instancetype) weibo;
40 
41 @end

 1 //
 2 //  Weibo.m
 3 //  Weibo
 4 //
 5 //  Created by hellovoidworld on 14/12/5.
 6 //  Copyright (c) 2014年 hellovoidworld. All rights reserved.
 7 //
 8 
 9 #import "Weibo.h"
10 
11 @implementation Weibo
12 
13 /** 使用字典赋值成员 */
14 - (instancetype) initWithDictionary:(NSDictionary *) dictionary {
15     if (self = [super init]) {
16         [self setValuesForKeysWithDictionary:dictionary];
17     }
18    
19     return self;
20 }
21 
22 /** 使用字典赋值成员 */
23 + (instancetype) weiboWithDictionary:(NSDictionary *) dictionary {
24     return [[self alloc] initWithDictionary:dictionary];
25 }
26 
27 /** 返回空的model */
28 + (instancetype) weibo {
29     return [self weiboWithDictionary:nil];
30 }
31 
32 @end

 1 //
 2 //  WeiboFrame.h
 3 //  Weibo
 4 //
 5 //  Created by hellovoidworld on 14/12/5.
 6 //  Copyright (c) 2014年 hellovoidworld. All rights reserved.
 7 //
 8 
 9 // 装在了每个cell的位置、尺寸和微博数据的model
10 
11 @class Weibo;
12 #import <Foundation/Foundation.h>
13 #import <UIKit/UIKit.h> // CGRect需要引入UIKit
14 
15 @interface WeiboFrame : NSObject
16 
17 // 微博数据
18 @property(nonatomic, strong) Weibo *weibo;
19 
20 /** 头像 */
21 @property(nonatomic, assign, readonly) CGRect iconFrame;
22 
23 /** 昵称 */
24 @property(nonatomic, assign, readonly) CGRect nameFrame;
25 
26 /** vip标志 */
27 @property(nonatomic, assign, readonly) CGRect vipFrame;
28 
29 /** 博文 */
30 @property(nonatomic, assign, readonly) CGRect textFrame;
31 
32 /** 配图 */
33 @property(nonatomic, assign, readonly) CGRect pictureFrame;
34 
35 /** 一条微博cell的高度 */
36 @property(nonatomic, assign, readonly) CGFloat cellHeight;
37 
38 
39 @end

 1 //
 2 //  WeiboFrame.m
 3 //  Weibo
 4 //
 5 //  Created by hellovoidworld on 14/12/5.
 6 //  Copyright (c) 2014年 hellovoidworld. All rights reserved.
 7 //
 8 
 9 #import "WeiboFrame.h"
10 #import "Weibo.h"
11 
12 // 昵称字体
13 #define NAME_FONT [UIFont systemFontOfSize:14]
14 // 博文字体
15 #define TEXT_FONT [UIFont systemFontOfSize:15]
16 
17 @implementation WeiboFrame
18 
19 #pragma mark - 加载数据
20 // 加载数据，用以计算各个控件的位置、尺寸
21 - (void)setWeibo:(Weibo *)weibo {
22     _weibo = weibo;
23    
24     // 间隙参数
25     CGFloat padding = 10;
26    
27     // 1.头像
28     CGFloat iconWidth = 30;
29     CGFloat iconHeight = 30;
30     CGFloat iconX = padding;
31     CGFloat iconY = padding;
32     _iconFrame = CGRectMake(iconX, iconY, iconWidth, iconHeight);
33    
34     // 2.昵称
35     // 计算昵称占用的size
36     CGSize nameSize = [self calTextSizeWithText:self.weibo.name font:TEXT_FONT maxSize:CGSizeMake(MAXFLOAT, MAXFLOAT)];
37    
38     CGFloat nameX = CGRectGetMaxX(_iconFrame) + padding;
39     CGFloat nameY = iconY + (iconHeight - nameSize.height) / 2;// 居中
40     _nameFrame.size = nameSize;
41     _nameFrame.origin = CGPointMake(nameX, nameY);
42    
43     // 3.vip标志
44     CGFloat vipWith = 14;
45     CGFloat vipHeight = 14;
46     CGFloat vipX = CGRectGetMaxX(_nameFrame) + padding;
47     CGFloat vipY = nameY;
48     _vipFrame = CGRectMake(vipX, vipY, vipWith, vipHeight);
49    
50     // 4.博文
51     CGSize textSize = [self calTextSizeWithText:self.weibo.text font:TEXT_FONT maxSize:CGSizeMake(300, MAXFLOAT)];
52     CGFloat textX = padding;
53     CGFloat textY = CGRectGetMaxY(_iconFrame) + padding;
54     _textFrame = CGRectMake(textX, textY, textSize.width, textSize.height);
55    
56     // 5.配图
57     if (self.weibo.picture) {
58         CGFloat pictureWidth = 100;
59         CGFloat pictureHeight = 100;
60         CGFloat pictureX = padding;
61         CGFloat pictureY = CGRectGetMaxY(_textFrame) + padding;
62         _pictureFrame = CGRectMake(pictureX, pictureY, pictureWidth, pictureHeight);
63        
64         _cellHeight = CGRectGetMaxY(_pictureFrame) + padding; //计算cell高度
65     }
66     else {
67         _cellHeight = CGRectGetMaxY(_textFrame) + padding;
68     }
69 }
70 
71 // 使用自带方法计算一段文字占用的size
72 - (CGSize) calTextSizeWithText:(NSString *) text font:(UIFont *) font maxSize:(CGSize) maxSize {
73     NSDictionary *attrs = @{NSFontAttributeName : font};
74    
75     return [text boundingRectWithSize:maxSize options:NSStringDrawingUsesLineFragmentOrigin attributes:attrs context:nil].size;
76 }
77 
78 @end
79