iOS学习之驾照题库(练习页面跳转,传值,UITableView,原生json解析)

仅供自己学习参考笔记

效果图:

新建项目JSONParseDemo

在Main.storyboard拉取UItableView控件到View上(一定不要在此刻关联协议,协议必须在数据从网络端获取到以后再绑定协议),如图:

新建TableViewCell类并创建xib文件

其次,根据数据请求到的json字符串中的字段新建Exams和Details类,用于解析

->Exams.h

#import <Foundation/Foundation.h>@interface Exams : NSObject@property(copy,nonatomic) NSString* error_code;@property(copy,nonatomic) NSString* reason;@property(copy,nonatomic)NSArray* result;@end

->Exam.m

#import "Exams.h"@implementation Exams@synthesize error_code;@synthesize reason;@synthesize result;@end

->Details.h

#import <Foundation/Foundation.h>@interface Details : NSObject@property (copy,nonatomic) NSString* cid;@property(copy,nonatomic) NSString* question;@property(copy,nonatomic) NSString* anwser;@property(copy,nonatomic) NSString* item1;@property(copy,nonatomic) NSString* item2;@property(copy,nonatomic) NSString* item3;@property(copy,nonatomic) NSString* item4;@property(copy,nonatomic) NSString* explains;@property(copy,nonatomic) NSString* url;@end

->Details.m

#import "Details.h"@implementation Details@synthesize cid;@synthesize question;@synthesize anwser;@synthesize item1;@synthesize item2;@synthesize item3;@synthesize item4;@synthesize explains;@synthesize url;@end

ViewController.m代码

////  ViewController.m//  JSONParse////  Created by 安前松 on 15/12/16.//  Copyright © 2015年 安前松. All rights reserved.//#import "ViewController.h"@interface ViewController ()@end@implementation ViewController- (void)viewDidLoad {    [super viewDidLoad];    static NSString *urlString=@"http://apis.baidu.com/bbtapi/jztk/jztk_query?subject=1&model=c1&testType=rand";    static NSString* apikey=@"751416ad67dd313690c2caa7633f992b";    NSURL *url=[NSURL URLWithString:urlString];    [self request:url withHttpArg:apikey];}- (void)didReceiveMemoryWarning {    [super didReceiveMemoryWarning];    // Dispose of any resources that can be recreated.}-(void) request:(NSURL*) requestUrl withHttpArg:(NSString*) apikey{    NSMutableURLRequest * request=[[NSMutableURLRequest alloc] initWithURL:requestUrl cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:10];    [request setHTTPMethod:@"GET"];    [request addValue:apikey forHTTPHeaderField:@"apikey"];    [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response,NSData *data,NSError *error){        if(error){            NSLog(@"Httperror: %@%ld", error.localizedDescription, error.code);        }else{            NSInteger responseCode = [(NSHTTPURLResponse *)response statusCode];            NSString *responseString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];            NSLog(@"HttpResponseCode:%ld", responseCode);//            NSLog(@"HttpResponseBody:%@",responseString);            [self parse:data];                }    }];}-(void)parse:(NSData*)data{    NSError *error=nil;    id jsonObject=[NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:&error];    if([jsonObject isKindOfClass:[NSDictionary class]]){                NSDictionary *dictionary=(NSDictionary*)jsonObject;        Exams * exam=[Exams new];        NSString *error_code=[dictionary objectForKey:@"error_code"];        NSString *reason=[dictionary objectForKey:@"reason"];        exam.error_code=error_code;        exam.reason=reason;        NSArray *result=[dictionary objectForKey:@"result"];        NSMutableArray *details=[[NSMutableArray alloc] init];        for(int i=0;i<[result count];i++){            Details *detail=[Details new];            NSDictionary *d=(NSDictionary*)result[i];            NSString* cid=[d objectForKey:@"id"];            NSString * question=[d objectForKey:@"question"];            NSString * anwser=[d objectForKey:@"answer"];            NSString* item1=[d objectForKey:@"item1"];            NSString* item2=[d objectForKey:@"item2"];            NSString* item3=[d objectForKey:@"item3"];            NSString* item4=[d objectForKey:@"item4"];            NSString* explains=[d objectForKey:@"explains"];            NSString* url=[d objectForKey:@"url"];            detail.cid=cid;            detail.question=question;            detail.anwser=anwser;            detail.item1=item1;            detail.item2=item2;            detail.item3=item3;            detail.item4=item4;            detail.explains=explains;            detail.url=url;            [details insertObject:detail atIndex:i];            detail=nil;        }        self.datas=details;        exam.result=details;        [self initView:exam];    }}-(void) initView:(Exams*) data{    self.table.delegate=self;    self.table.dataSource=self;}-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{    return [self.datas count];}-(UITableViewCell*)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{    TableViewCell *cell=[self.table dequeueReusableCellWithIdentifier:@"cell"];    if(cell==nil){        cell=[[[NSBundle mainBundle] loadNibNamed:@"TableViewCell" owner:self options:nil] lastObject];    }    Details *d=self.datas[indexPath.row];    NSString *str=d.cid;    NSString* text=[[NSString alloc] initWithString:[NSString stringWithFormat:@"题目%@",str]];    cell.label.text=text;    return cell;}-(void) tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{    DetailView *detailView=[[DetailView alloc] initWithNibName:@"DetailView" bundle:nil];    detailView.detail=self.datas[indexPath.row];    [detailView setModalTransitionStyle:UIModalTransitionStyleFlipHorizontal];    [self presentModalViewController:detailView animated:YES];}@end

详情页面:

新建DetailView并创建xib

->DetailView.h

#import <UIKit/UIKit.h>#import "Details.h"@interface DetailView : UIViewController@property (strong, nonatomic) IBOutlet UITextView *tv_question;@property (strong, nonatomic) IBOutlet UITextView *item1;@property (strong, nonatomic) IBOutlet UITextView *item2;@property (strong, nonatomic) IBOutlet UITextView *item3;@property (strong, nonatomic) IBOutlet UITextView *item4;- (IBAction)back:(id)sender;@property (strong, nonatomic) IBOutlet UIImageView *imageView;- (IBAction)button:(id)sender;@property (strong, nonatomic) IBOutlet UITextView *tv_anwser;@property(strong,nonatomic) Details* detail;@end

->DetailView.m

#import "DetailView.h"@interface DetailView ()@end@implementation DetailView- (void)viewDidLoad {    [super viewDidLoad];    self.tv_question.text=self.detail.question;    NSString *A=[[NSString alloc] initWithString:[NSString stringWithFormat:@"A:%@",self.detail.item1]];    NSString *B=[[NSString alloc] initWithString:[NSString stringWithFormat:@"B:%@",self.detail.item2]];    NSString *C=[[NSString alloc] initWithString:[NSString stringWithFormat:@"C:%@",self.detail.item3]];    NSString *D=[[NSString alloc] initWithString:[NSString stringWithFormat:@"D:%@",self.detail.item4]];    self.item1.text=A;    self.item2.text=B;    self.item3.text=C;    self.item4.text=D;    NSURL *picUrl=[NSURL URLWithString:self.detail.url];    if(picUrl!=nil){    NSData *data=[NSData dataWithContentsOfURL:picUrl];    UIImage *image=[UIImage imageWithData:data];    self.imageView.image=image;    }}- (void)didReceiveMemoryWarning {    [super didReceiveMemoryWarning];    // Dispose of any resources that can be recreated.}- (IBAction)button:(id)sender {    NSString *s=self.detail.anwser;    if([s isEqualToString:@"1"]){        s=@"A";    }else if([s isEqualToString:@"2"]){        s=@"B";    }else if([s isEqualToString:@"3"]){        s=@"C";    }else if([ s isEqualToString:@"4"]){        s=@"D";    }     NSString *anwser=[[NSString alloc] initWithString:[NSString stringWithFormat:@"答案:%@",s]];    self.tv_anwser.text=anwser;}- (IBAction)back:(id)sender {    [self dismissModalViewControllerAnimated:YES];}@end