不等高cell的搭建(一)

1 typedef enum : NSUInteger {
2     XTThemeItemTypeAll = 1,
3     XTThemeItemTypeVideo = 41,
4     XTThemeItemTypeVoice = 31,
5     XTThemeItemTypePicture = 10,
6     XTThemeItemTypeText = 29
7 } XTThemeItemType;

 1      // middleView:一样计算方式
 2     // 不是段子的时候,才需要计算中间View的Frame
 3     if (item.type != XMGThemeItemTypeText) {
 4         CGFloat middleW = textW;
 5         CGFloat middleH = middleW / item.width * item.height;
 6         if (middleH > XTScreenH) {  // 大图
 7             middleH = 300;
 8             item.is_bigPicture = YES;
 9         }
10         CGFloat middleX = margin;
11         CGFloat middleY = _cellH;
12         _middleViewFrame = CGRectMake(middleX, middleY, middleW, middleH);
13         _cellH = CGRectGetMaxY(_middleViewFrame) + margin;
14     }

1   [[SDImageCache sharedImageCache] storeImage:image forKey:item.image0];
2           注意:要到入头文件: #import <SDImageCache.h>

        UIImage *image = [[SDImageCache sharedImageCache] imageFromDiskCacheForKey:item.image0];

 1            - (void)awakeFromNib
 2 {
 3     _progressView.progressLabel.textColor = [UIColor whiteColor];
 4     _progressView.progressTintColor = [UIColor whiteColor];
 5     _progressView.roundedCorners = 10;
 6     
 7     _progressView.progressLabel.text = [NSString stringWithFormat:@"%.1f%%",0.0 * 100];
 8     _progressView.progress = 0;
 9 }
10  
11 - (void)setItem:(XMGThemeItem *)item
12 {
13     _item = item;
14    
15     // 设置图片
16     UIImage *image = [[SDImageCache sharedImageCache] imageFromDiskCacheForKey:item.image0];
17     if (image) {   如果有图片直接设置,并把进度设为100%
18         _imageView.image = image;
19         _progressView.progressLabel.text = [NSString stringWithFormat:@"%.1f%%",1.0 * 100];
20         _progressView.progress = 1;
21     } else {    如果没有图片,就先把进度设置为0 ,再去下载图片
22         _progressView.progressLabel.text = [NSString stringWithFormat:@"%.1f%%",0.0 * 100];
23         _progressView.progress = 0;
24         // 下载网络图片
25         [_imageView sd_setImageWithURL:[NSURL URLWithString:item.image0]  placeholderImage:nil options:SDWebImageRetryFailed progress:^(NSInteger receivedSize, NSInteger expectedSize) {
26             进度就为已下载的文件大小 / 总文件大小
27             CGFloat progress = 1.0 * receivedSize / expectedSize;
28             运行发现,进度有时候为-0,打印发现总文件大小该开始为-0       当为-0 的时候就返回
29           注意:该block会频换调用,所以  returen一次没关系
30             if (expectedSize < 0) return ;
31             _progressView.progressLabel.text = [NSString stringWithFormat:@"%.1f%%",progress * 100];
32             _progressView.progress = progress;
33            
34         } completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType, NSURL *imageURL) {
35            
36             if (!item.is_bigPicture) return ;
37            
38             // 生成一个新拉伸好图片
39             CGFloat w = XMGScreenW - 20;
40             CGFloat h = w / item.width * item.height;
41            
42             // 开启图形上下文
43             UIGraphicsBeginImageContextWithOptions(CGSizeMake(w, h), NO, 0);
44             // 绘图
45             [image drawInRect:CGRectMake(0, 0, w, h)];
46             // 获取上下文图片
47             image = UIGraphicsGetImageFromCurrentImageContext();
48             // 保存图片到沙盒
49             [[SDImageCache sharedImageCache] storeImage:image forKey:item.image0];
50             // 关闭上下文
51             UIGraphicsEndImageContext();
52            
53             _imageView.image = image;  
54         }];
55     }
56     根据服务器数据,决定gif图片是否显示
57     _gifView.hidden = !item.is_gif;
58      根据自己判断保存的属性,来决定显示大图按钮是否显示
59     _seeBigButton.hidden = !item.is_bigPicture;
60  
61     if (item.is_bigPicture) {
62         _imageView.contentMode = UIViewContentModeTop;
63         _imageView.clipsToBounds = YES;
64     } else {
65         _imageView.contentMode = UIViewContentModeScaleToFill;
66         _imageView.clipsToBounds = NO;
67     }
68 }

1     NSInteger minute = item.voicetime / 60;
2     NSInteger second = item.voicetime % 60;
3     self.timeLabel.text = [NSString stringWithFormat:@"%02ld:%02ld",minute,second];

 1     // middleView
 2     if (vm.item.type == XMGThemeItemTypePicture) { // 图片
 3         _pictureView.hidden = NO;
 4         _videoView.hidden = YES;
 5         _voiceView.hidden = YES;
 6        
 7         _pictureView.item = vm.item;
 8         _pictureView.frame = vm.middleViewFrame;
 9      
10     } else if (vm.item.type == XMGThemeItemTypeVideo) { // 视频
11         _pictureView.hidden = YES;
12         _videoView.hidden = NO;
13         _voiceView.hidden = YES;
14        
15         _videoView.item = vm.item;
16         _videoView.frame = vm.middleViewFrame;
17     } else if (vm.item.type == XMGThemeItemTypeVoice) { // 音频
18         _pictureView.hidden = YES;
19         _videoView.hidden = YES;
20         _voiceView.hidden = NO;
21        
22         _voiceView.item = vm.item;
23         _voiceView.frame = vm.middleViewFrame;
24        
25     } else {
26         _voiceView.hidden = YES;
27         _pictureView.hidden = YES;
28         _videoView.hidden = YES;
29     }