LimitDemo

    在做一个比较大的工程的时候，最好是用MVC模型

因为每个页面都有导航，所以建一个BaseViewController页面继承UIViewController

#import <UIKit/UIKit.h>
#import "MyConnection.h"
#define WINSIZE [[UIScreen mainScreen] bounds].size
//宏定义   屏幕的大小

@interface BaseViewController : UIViewController

@end

每个页面也都包含TableView，所以建一个BaseTableViewController页面继承BaseViewController

#import "BaseViewController.h"
//协议写在.h中，为了子类继承的时候能够看到协议
@interface BaseTableViewController : BaseViewController <UITableViewDataSource,UITableViewDelegate>

@property (strong,nonatomic)UITableView *tableView;
@property (strong,nonatomic)NSMutableArray *dataArray;


@end

#import "BaseTableViewController.h"

@interface BaseTableViewController () 

@end

@implementation BaseTableViewController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    self.dataArray = [[NSMutableArray alloc] init];
    self.tableView = [[UITableView alloc] initWithFrame:CGRectMake(0, 0, WINSIZE.width, WINSIZE.height-64-49)];
    self.tableView.delegate = self;
    self.tableView.dataSource = self;
    self.tableView.rowHeight = 100;//设置行高
    [self.view addSubview:self.tableView];
}


- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return self.dataArray.count;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    return nil;
}




@end

在AppDelegate中添加导航，设置图标，设置导航的背景，字体属性

//导航背景，设置之后的所有tabBar上的导航都会得到应用
    [[UINavigationBar appearance] setBackgroundImage:[UIImage imageNamed:@"顶部条背景"]  forBarMetrics:UIBarMetricsDefault];
//导航字体属性
    
    [[UINavigationBar appearance] setTitleTextAttributes:
  @{NSFontAttributeName:[UIFont systemFontOfSize:20],NSForegroundColorAttributeName:[UIColor whiteColor]
    }];




 for(int i = 0;i<array.count;i++){
        //遍历页面
        //添加导航
        UIViewController *vc = array[i];
        //设置标题
        vc.title = titleArray[i];
        UINavigationController *nc = [[UINavigationController alloc] initWithRootViewController:vc];
        [array replaceObjectAtIndex:i withObject:nc];//数组变成导航
        
        //设置图标（正常情况下和点击的情况下）
        vc.tabBarItem.image = [UIImage imageNamed:[NSString stringWithFormat:@"btn_%@_正常",titleArray[i]]];
        vc.tabBarItem.selectedImage = [[UIImage imageNamed:[NSString stringWithFormat:@"btn_%@_点击",titleArray[i]]] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];//选中图标样式，修改渲染模式
        
    }
    UITabBarController *tc = [[UITabBarController alloc] init];
    //90 187 37
    tc.tabBar.tintColor = [UIColor colorWithRed:90/255.0 green:187/255.0 blue:37/255.0 alpha:1];//改变字体颜色
    tc.viewControllers = array;
    self.window.rootViewController = tc;

下面是将系统的请求封装起来，方便调用

#import <Foundation/Foundation.h>
//block
typedef void (^FinishBlock) (NSData *data);
//typedef void(^) (NSData *data) FinishBlock;//与上面那句是同一个意思
typedef void (^FailedBlock)();

/*
 FinishBlock finishiBlock;
 void(^finishiBlock)(NSData *);
 FinishBlock = ^(NSData *data)
 {
 }
 */




@interface MyRequest : NSObject
//请求的地址
@property (copy,nonatomic)NSString *url;
//block必须用copy修饰
//完成的回调
@property (copy,nonatomic)FinishBlock finishBlock;
//失败的回调
@property (copy,nonatomic)FailedBlock failedBlock;
//开始请求
- (void)startRequest;


@end

#import "MyRequest.h"

@interface MyRequest()<NSURLConnectionDataDelegate>
{
    NSMutableData *_mData;
}

@end

@implementation MyRequest
- (void)startRequest
{
    _mData = [[NSMutableData alloc] init];
    //系统请求
    NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:self.url]];
    [NSURLConnection connectionWithRequest:request delegate:self];
}

//接收响应
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{  //菊花（网络旁）
    [UIApplication sharedApplication].networkActivityIndicatorVisible = YES;
}

//接收响应体
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
    [_mData appendData:data];
}



//请求成功
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
    [UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
    if(self.finishBlock){
        self.finishBlock(_mData);
    }
}


//请求失败
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
    [UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
    if(self.failedBlock){
        self.failedBlock();
    }
}


@end

#import <Foundation/Foundation.h>
#import "MyRequest.h"
@interface MyConnection : NSObject
//类方法，外部可以通过类名调用
+ (void)connectionWithUrl:(NSString *)url FinishBlock:(FinishBlock) finishBlock FailedBlock:(FailedBlock)failedBlock;


@end






#import "MyConnection.h"

@implementation MyConnection

+ (void)connectionWithUrl:(NSString *)url FinishBlock:(FinishBlock) finishBlock FailedBlock:(FailedBlock)failedBlock
{
    MyRequest *request = [[MyRequest alloc] init];
    request.url = url;
    request.finishBlock = finishBlock;//外界传来的方法体
    request.failedBlock = failedBlock;//外界传来的方法体
    [request startRequest];
}

@end