源码0602-01-掌握-JSON解析

//  ViewController.m
//  01-掌握-JSON解析
#import "ViewController.h"
#import <UIImageView+WebCache.h>
#import <MediaPlayer/MediaPlayer.h>

@interface ViewController ()
/** 视频数据 */
@property (nonatomic, strong) NSArray *videos;
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
//    NSString *json = @"{"rich" : null}";
    NSString *json = @"10";
    NSLog(@"%@", [NSJSONSerialization JSONObjectWithData:[json dataUsingEncoding:NSUTF8StringEncoding] options:NSJSONReadingAllowFragments error:nil]);
    
    
    // 0.请求路径
    NSURL *url = [NSURL URLWithString:@"http://120.25.226.186:32812/video"];
    
    // 1.创建请求对象
    NSURLRequest *request = [NSURLRequest requestWithURL:url];
    
    // 2.发送请求
    [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
        // 解析JSON
        NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:nil];
        
        // 获得视频数组
        self.videos = dict[@"videos"];
        
        // 刷新表格
        [self.tableView reloadData];
        //[dict writeToFile:@"/Users/xiaomage/Desktop/video.plist" atomically:YES];//将json数据写入plist文件查看其格式内容；
    }];
}

// JSON格式化：http://tool.oschina.net/codeformat/json
- (void)parseJSON
{
    // 0.请求路径
    NSURL *url = [NSURL URLWithString:@"http://120.25.226.186:32812/login?username=520000&pwd=520it"];
    
    // 1.创建请求对象
    NSURLRequest *request = [NSURLRequest requestWithURL:url];
    
    // 2.发送请求
    [NSURLConnection sendAsynchronousRequest:request queue:[[NSOperationQueue alloc] init] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
        /*
         NSJSONReadingMutableContainers
         NSJSONReadingMutableLeaves
         NSJSONReadingAllowFragments //碎片式读取
         */
        // 解析JSON
        NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:nil];
        
        NSLog(@"%@", dict[@"error"]);
    }];
}

#pragma mark - 数据源方法
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return self.videos.count;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *ID = @"video";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:ID];
    
    NSDictionary *video = self.videos[indexPath.row];
    
    cell.textLabel.text = video[@"name"];
    cell.detailTextLabel.text = [NSString stringWithFormat:@"时长：%@", video[@"length"]];//字符串--->数值 -转化
    
    NSString *image = [@"http://120.25.226.186:32812" stringByAppendingPathComponent:video[@"image"]]; //路径字符串拼接
    [cell.imageView sd_setImageWithURL:[NSURL URLWithString:image] placeholderImage:[UIImage imageNamed:@"placeholder"]];
    
    return cell;
}

#pragma mark - 代理方法
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    NSDictionary *video = self.videos[indexPath.row];
    NSString *urlStr = [@"http://120.25.226.186:32812" stringByAppendingPathComponent:video[@"url"]];
    
    // 创建视频播放器
    MPMoviePlayerViewController *vc = [[MPMoviePlayerViewController alloc] initWithContentURL:[NSURL URLWithString:urlStr]];

    // 显示视频
    [self presentViewController:vc animated:YES completion:nil];
}

@end

02-掌握-JSON解析

MJExtension 插件  json解析 牛牛牛

//  ViewController.m
//  01-掌握-JSON解析
#import "ViewController.h"
#import <UIImageView+WebCache.h>
#import <MediaPlayer/MediaPlayer.h>
#import "XMGVideo.h"
#import <MJExtension.h>

@interface ViewController ()
/** 视频数据 */
@property (nonatomic, strong) NSArray *videos;
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    [XMGVideo setupReplacedKeyFromPropertyName:^NSDictionary *{
        return @{@"ID" : @"id"};
    }];
    
    // 0.请求路径
    NSURL *url = [NSURL URLWithString:@"http://120.25.226.186:32812/video"];
    
    // 1.创建请求对象
    NSURLRequest *request = [NSURLRequest requestWithURL:url];
    
    // 2.发送请求
    [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
        // 解析JSON
        NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:nil];
        
        // 获得视频的模型数组
        self.videos = [XMGVideo objectArrayWithKeyValuesArray:dict[@"videos"]];
        
        // 刷新表格
        [self.tableView reloadData];
    }];
}

#pragma mark - 数据源方法
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return self.videos.count;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *ID = @"video";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:ID];
    
    XMGVideo *video = self.videos[indexPath.row];
    
    cell.textLabel.text = video.name;
    cell.detailTextLabel.text = [NSString stringWithFormat:@"时长：%zd", video.length];
    
    NSString *image = [@"http://120.25.226.186:32812" stringByAppendingPathComponent:video.image];
    [cell.imageView sd_setImageWithURL:[NSURL URLWithString:image] placeholderImage:[UIImage imageNamed:@"placeholder"]];
    
    return cell;
}

#pragma mark - 代理方法
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    XMGVideo *video = self.videos[indexPath.row];
    NSString *urlStr = [@"http://120.25.226.186:32812" stringByAppendingPathComponent:video.url];
    
    // 创建视频播放器
    MPMoviePlayerViewController *vc = [[MPMoviePlayerViewController alloc] initWithContentURL:[NSURL URLWithString:urlStr]];

    // 显示视频
    [self presentViewController:vc animated:YES completion:nil];
}

@end

//
//  XMGVideo.h
//  01-掌握-JSON解析
#import <Foundation/Foundation.h>

@interface XMGVideo : NSObject
/** ID */
@property (nonatomic, assign) NSInteger ID;
/** 视频名字 */
@property (nonatomic, copy) NSString *name;
/** 视频时长 */
@property (nonatomic, assign) NSInteger length;
/** 视频图片 */
@property (nonatomic, copy) NSString *image;
/** 视频文件路径 */
@property (nonatomic, copy) NSString *url;
@end

//
//  XMGVideo.m
//  01-掌握-JSON解析
#import "XMGVideo.h"

@implementation XMGVideo
//+ (NSDictionary *)replacedKeyFromPropertyName
//{
//    return @{@"ID" : @"id",
//             @"desc" : @"description"};
//}
@end