又被小姑娘问到图文混排怎么做，拿过来看看，也不算纯粹的图文混排了，其实还是cell的自适应，只不过cell里面可能是文字也可能是图片，于是乎开始码代码，啷哩个啷，接口在此（不知道哪来的）：https://api.108tian.com/mobile/v3/SceneDetail?id=528b91c9baf6773975578c5c，看一下json格式的数据：
效果图：
数据嘛，初看有点复杂，不过只要做成自己想要的样子不就好了。
这里有两个点要注意：
1.计算图片大小；
2.计算label的高度；
另外。博主用的AF3.0做的数据请求，有兴趣的可以看看。
这几点在具体代码中都有体现，下面看.m文件：
// // ViewController.m // cell自适应 // // Created by 刘浩浩 on 16/6/8. // Copyright © 2016年 CodingFire. All rights reserved. // #import "ViewController.h" #import "AFNetwork3.0/AFNetworking/AFNetworking.h" #import "UIImageView+WebCache.h" #import "DataModel.h" #define PICURL @"http://pic.108tian.com/pic/" #define VIEWWIDTH self.view.frame.size.width #define VIEWHEIGHT self.view.frame.size.height @interface ViewController ()<UITableViewDelegate,UITableViewDataSource> { UITableView *_tableView; NSMutableArray *_daraArray; } @end @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. _daraArray=[[NSMutableArray alloc]init]; [self loadData]; } /* *下载数据 *使用AFNetWorking3.0 */ -(void)loadData { AFHTTPSessionManager *manager = [AFHTTPSessionManager manager]; manager.requestSerializer = [AFJSONRequestSerializer serializer];//请求 manager.responseSerializer = [AFHTTPResponseSerializer serializer];//响应 // 设置超时时间 manager.requestSerializer.timeoutInterval = 8.f; manager.responseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"text/json",@"text/html",@"text/plain",@"application/json",nil]; [manager POST:@"https://api.108tian.com/mobile/v3/SceneDetail?id=528b91c9baf6773975578c5c" parameters:nil progress:^(NSProgress *progress) { } success:^(NSURLSessionDataTask *_Nullable task,id _Nonnull responseObject) { NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:responseObject options:NSJSONReadingMutableContainers error:nil]; NSLog(@"%@",dic); NSDictionary *data=[dic objectForKey:@"data"]; NSDictionary *details=[data objectForKey:@"details"]; NSArray *paragraph=[details objectForKey:@"paragraph"]; for (NSDictionary *subDic in paragraph) { NSArray *body=[subDic objectForKey:@"body"]; for (NSDictionary *bodySubDic in body) { DataModel *dataModel=[[DataModel alloc]init]; if ([bodySubDic objectForKey:@"text"]!=nil) { dataModel.text=[bodySubDic objectForKey:@"text"]; } else { dataModel.url=[[bodySubDic objectForKey:@"img"] objectForKey:@"url"]; } [_daraArray addObject:dataModel]; } } [self initTableView]; }failure:^(NSURLSessionDataTask*_Nullable task,NSError *error) { NSLog(@"%@",error); }]; } /* * *UITableView初始化 * */ -(void)initTableView { _tableView=[[UITableView alloc]initWithFrame:CGRectMake(0, 0, VIEWWIDTH, VIEWHEIGHT) style:UITableViewStylePlain]; _tableView.delegate=self; _tableView.dataSource=self; [self.view addSubview:_tableView]; [_tableView reloadData]; } #pragma mark - UITableViewDelegate -(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { return _daraArray.count ; } -(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath { DataModel *dataModel=[_daraArray objectAtIndex:indexPath.row]; if (dataModel.text!=nil) { NSDictionary *attribute = @{NSFontAttributeName: [UIFont systemFontOfSize:13]}; CGSize size = [dataModel.text boundingRectWithSize:CGSizeMake(VIEWWIDTH-20, 0) options: NSStringDrawingTruncatesLastVisibleLine | NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading attributes:attribute context:nil].size; return size.height+10; } else { CGSize size=[[self class]getImageSizeWithURL:[NSString stringWithFormat:@"%@%@",PICURL,dataModel.url]]; if (size.width>(VIEWWIDTH-20)) { return size.height/(size.width/(VIEWWIDTH-20))+10; } else { return size.height*((VIEWWIDTH-20)/size.width)+10; } } } -(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *cellIdentify=@"cell"; UITableViewCell *cell=[tableView dequeueReusableCellWithIdentifier:cellIdentify]; if (!cell) { cell=[[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentify]; } for (UIView *view in cell.contentView.subviews) { [view removeFromSuperview]; } cell.selectionStyle=UITableViewCellSelectionStyleNone; tableView.separatorStyle=UITableViewCellSeparatorStyleNone; DataModel *dataModel=[_daraArray objectAtIndex:indexPath.row]; if (dataModel.text!=nil) { NSDictionary *attribute = @{NSFontAttributeName: [UIFont systemFontOfSize:13]}; CGSize size = [dataModel.text boundingRectWithSize:CGSizeMake(VIEWWIDTH-10, 0) options: NSStringDrawingTruncatesLastVisibleLine | NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading attributes:attribute context:nil].size; UILabel *contentLabel=[[UILabel alloc]initWithFrame:CGRectMake(10, 10, VIEWWIDTH-20, size.height)]; contentLabel.text=dataModel.text; contentLabel.numberOfLines=0; contentLabel.textColor=[UIColor blackColor]; contentLabel.font=[UIFont systemFontOfSize:13]; [cell.contentView addSubview:contentLabel]; } else { UIImageView *imageView=[[UIImageView alloc]init]; [imageView sd_setImageWithURL:[NSURL URLWithString:[NSString stringWithFormat:@"%@%@",PICURL,dataModel.url]]]; CGSize size=[[self class]getImageSizeWithURL:[NSString stringWithFormat:@"%@%@",PICURL,dataModel.url]]; if (size.width>(VIEWWIDTH-20)) { imageView.frame=CGRectMake(10, 10, VIEWWIDTH-20, size.height/(size.width/(VIEWWIDTH-20))); } else { imageView.frame=CGRectMake(10, 10, VIEWWIDTH-20, size.height*((VIEWWIDTH-20)/size.width)); } [cell.contentView addSubview:imageView]; } return cell; } #pragma mark - 根据图片url获取图片尺寸 +(CGSize)getImageSizeWithURL:(id)imageURL { NSURL* URL = nil; if([imageURL isKindOfClass:[NSURL class]]){ URL = imageURL; } if([imageURL isKindOfClass:[NSString class]]){ URL = [NSURL URLWithString:imageURL]; } if(URL == nil) return CGSizeZero; // url不正确返回CGSizeZero NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:URL]; NSString* pathExtendsion = [URL.pathExtension lowercaseString]; CGSize size = CGSizeZero; if([pathExtendsion isEqualToString:@"png"]){ size = [self getPNGImageSizeWithRequest:request]; } else if([pathExtendsion isEqual:@"gif"]) { size = [self getGIFImageSizeWithRequest:request]; } else{ size = [self getJPGImageSizeWithRequest:request]; } if(CGSizeEqualToSize(CGSizeZero, size)) // 如果获取文件头信息失败,发送异步请求请求原图 { NSData* data = [NSURLConnection sendSynchronousRequest:[NSURLRequest requestWithURL:URL] returningResponse:nil error:nil]; UIImage* image = [UIImage imageWithData:data]; if(image) { size = image.size; } } return size; } // 获取PNG图片的大小 +(CGSize)getPNGImageSizeWithRequest:(NSMutableURLRequest*)request { [request setValue:@"bytes=16-23" forHTTPHeaderField:@"Range"]; NSData* data = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil]; if(data.length == 8) { int w1 = 0, w2 = 0, w3 = 0, w4 = 0; [data getBytes:&w1 range:NSMakeRange(0, 1)]; [data getBytes:&w2 range:NSMakeRange(1, 1)]; [data getBytes:&w3 range:NSMakeRange(2, 1)]; [data getBytes:&w4 range:NSMakeRange(3, 1)]; int w = (w1 << 24) + (w2 << 16) + (w3 << 8) + w4; int h1 = 0, h2 = 0, h3 = 0, h4 = 0; [data getBytes:&h1 range:NSMakeRange(4, 1)]; [data getBytes:&h2 range:NSMakeRange(5, 1)]; [data getBytes:&h3 range:NSMakeRange(6, 1)]; [data getBytes:&h4 range:NSMakeRange(7, 1)]; int h = (h1 << 24) + (h2 << 16) + (h3 << 8) + h4; return CGSizeMake(w, h); } return CGSizeZero; } // 获取gif图片的大小 +(CGSize)getGIFImageSizeWithRequest:(NSMutableURLRequest*)request { [request setValue:@"bytes=6-9" forHTTPHeaderField:@"Range"]; NSData* data = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil]; if(data.length == 4) { short w1 = 0, w2 = 0; [data getBytes:&w1 range:NSMakeRange(0, 1)]; [data getBytes:&w2 range:NSMakeRange(1, 1)]; short w = w1 + (w2 << 8); short h1 = 0, h2 = 0; [data getBytes:&h1 range:NSMakeRange(2, 1)]; [data getBytes:&h2 range:NSMakeRange(3, 1)]; short h = h1 + (h2 << 8); return CGSizeMake(w, h); } return CGSizeZero; } // 获取jpg图片的大小 +(CGSize)getJPGImageSizeWithRequest:(NSMutableURLRequest*)request { [request setValue:@"bytes=0-209" forHTTPHeaderField:@"Range"]; NSData* data = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil]; if ([data length] <= 0x58) { return CGSizeZero; } if ([data length] < 210) {// 肯定只有一个DQT字段 short w1 = 0, w2 = 0; [data getBytes:&w1 range:NSMakeRange(0x60, 0x1)]; [data getBytes:&w2 range:NSMakeRange(0x61, 0x1)]; short w = (w1 << 8) + w2; short h1 = 0, h2 = 0; [data getBytes:&h1 range:NSMakeRange(0x5e, 0x1)]; [data getBytes:&h2 range:NSMakeRange(0x5f, 0x1)]; short h = (h1 << 8) + h2; return CGSizeMake(w, h); } else { short word = 0x0; [data getBytes:&word range:NSMakeRange(0x15, 0x1)]; if (word == 0xdb) { [data getBytes:&word range:NSMakeRange(0x5a, 0x1)]; if (word == 0xdb) {// 两个DQT字段 short w1 = 0, w2 = 0; [data getBytes:&w1 range:NSMakeRange(0xa5, 0x1)]; [data getBytes:&w2 range:NSMakeRange(0xa6, 0x1)]; short w = (w1 << 8) + w2; short h1 = 0, h2 = 0; [data getBytes:&h1 range:NSMakeRange(0xa3, 0x1)]; [data getBytes:&h2 range:NSMakeRange(0xa4, 0x1)]; short h = (h1 << 8) + h2; return CGSizeMake(w, h); } else {// 一个DQT字段 short w1 = 0, w2 = 0; [data getBytes:&w1 range:NSMakeRange(0x60, 0x1)]; [data getBytes:&w2 range:NSMakeRange(0x61, 0x1)]; short w = (w1 << 8) + w2; short h1 = 0, h2 = 0; [data getBytes:&h1 range:NSMakeRange(0x5e, 0x1)]; [data getBytes:&h2 range:NSMakeRange(0x5f, 0x1)]; short h = (h1 << 8) + h2; return CGSizeMake(w, h); } } else { return CGSizeZero; } } } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } @end
