自定义viewController的基础类

//
//  LJBaseViewController.h
//  TyApp
//
//  Created by TY-DENG on 16/11/24.
//  Copyright © 2016年 Lin. All rights reserved.
//

#import <UIKit/UIKit.h>
#import <AVFoundation/AVFoundation.h>
#import <UIKit+AFNetworking.h>
#import "LJTool.h"
#import "LJNetWorkUrl.h"


typedef void (^NetWorkReturnDictionary)(NSDictionary *dictionary);

@interface LJBaseViewController : UIViewController<UITextFieldDelegate>
{
    AVCaptureSession *CaptureSession;//扫描
    UIView *CaptureVideoPreviewLayerView; //扫描
    UIButton *doneInKeyboardButton;//数据键回收键盘
}




//设置网络
-(void) netWorkWithString:(NSString *)string WithKey:(NSInteger )key HandlerBlock:(NetWorkReturnDictionary) block;
//开始扫描
-(void) scanActionStartDelegate:(id<AVCaptureMetadataOutputObjectsDelegate>)delegate ;
//停止扫描
-(void)scanActionStopCaptureSession;

-(void) viewAnimations:(CGRect)bounds Duration:(CGFloat)time View:(UIView *)view;

-(void) naviagtionControllerBarButtonItemBack;

-(void) backViewcontroller;

@end

//
//  LJBaseViewController.m
//  TyApp
//
//  Created by TY-DENG on 16/11/24.
//  Copyright © 2016年 Lin. All rights reserved.
//

#import "LJBaseViewController.h"


@interface LJBaseViewController ()
{
    UITextField *_EditTextField;
}
@end

@implementation LJBaseViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    [self NoitifinationCenterListener];
    [self setNavgation];
}


-(void) setNavgation{
    self.navigationItem.hidesBackButton = YES;//可以隐藏原有的导航栏返回按钮
    //设置的按钮会显示在导航栏左边，返回按钮的位置
    UIBarButtonItem *barButtonItem = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"activity_back.png"] style:UIBarButtonItemStylePlain target:self action:@selector(backViewcontroller)];
    self.navigationItem.leftBarButtonItem = barButtonItem;
    UINavigationBar *bar = [UINavigationBar appearance];

    //设置显示的颜色
    bar.barTintColor = [UIColor clearColor];
    //设置字体颜色
    bar.tintColor = [UIColor whiteColor];
    [bar setTitleTextAttributes:@{NSForegroundColorAttributeName : [UIColor whiteColor]}];

}
/**
 扫描二维码事件
 **/

//开始扫描
-(void) scanActionStartDelegate:(id<AVCaptureMetadataOutputObjectsDelegate>)delegate {
    //判断摄像头情况
    NSString * mediaType = AVMediaTypeVideo;
    AVAuthorizationStatus  authorizationStatus = [AVCaptureDevice authorizationStatusForMediaType:mediaType];
    if (authorizationStatus == AVAuthorizationStatusRestricted|| authorizationStatus == AVAuthorizationStatusDenied) {
        [LJTool setAlertViewControllerTittle:@"提示" Message:@"摄像头获取受限！请检查摄像头设置。" Button:@"我知道了" handlerBlock:^(UIAlertAction *action) {

        } viewController:self];
    }else{

        // Do any additional setup after loading the view, typically from a nib.
        //获取摄像设备
        AVCaptureDevice * device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
        //创建输入流
        AVCaptureDeviceInput * input = [AVCaptureDeviceInput deviceInputWithDevice:device error:nil];
        //创建输出流
        AVCaptureMetadataOutput * output = [[AVCaptureMetadataOutput alloc]init];
        //设置代理 在主线程里刷新
        [output setMetadataObjectsDelegate:delegate queue:dispatch_get_main_queue()];
        //初始化链接对象
        CaptureSession = [[AVCaptureSession alloc]init];
        //高质量采集率
        [CaptureSession setSessionPreset:AVCaptureSessionPresetHigh];

        if(input!= nil){
            [CaptureSession addInput:input];
            [CaptureSession addOutput:output];
            //设置扫码支持的编码格式(如下设置条形码和二维码兼容)
            output.metadataObjectTypes=@[AVMetadataObjectTypeQRCode,AVMetadataObjectTypeEAN13Code, AVMetadataObjectTypeEAN8Code, AVMetadataObjectTypeCode128Code];
            AVCaptureVideoPreviewLayer * layer = [AVCaptureVideoPreviewLayer layerWithSession:CaptureSession];
            layer.videoGravity=AVLayerVideoGravityResizeAspectFill;
            [self setAVCaptureVideoPreviewLayerViewWithAVCaptureSession:layer];
            //开始捕获
            [CaptureSession startRunning];
        }else{
            [LJTool setAlertViewControllerTittle:@"提示" Message:@"获取摄像头出了点问题,请检查权限！" Button:@"我知道了" handlerBlock:^(UIAlertAction *action) {

            } viewController:self];
        }
    }
}

-(void) setAVCaptureVideoPreviewLayerViewWithAVCaptureSession:(CALayer*) avSession {
    CaptureVideoPreviewLayerView = [[UIView alloc] initWithFrame:CGRectMake(20, 164, self.view.frame.size.width - 40,200)];
    UIButton *stopButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 150, CaptureVideoPreviewLayerView.frame.size.width, 50)];
    [stopButton setTitle:@"关闭扫描" forState:UIControlStateNormal];
    [stopButton addTarget:self action:@selector(scanActionStopCaptureSession) forControlEvents:UIControlEventTouchUpInside];
    [stopButton setBackgroundColor:[UIColor grayColor]];
    UIView *PreviewLayerView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, CaptureVideoPreviewLayerView.frame.size.width,150)];

    [CaptureVideoPreviewLayerView addSubview:PreviewLayerView];
    [CaptureVideoPreviewLayerView addSubview:stopButton];
    [self.view addSubview:CaptureVideoPreviewLayerView];

    avSession.frame= PreviewLayerView.bounds;
    [PreviewLayerView.layer insertSublayer:avSession above:0];
}

-(void)scanActionStopCaptureSession{
    [CaptureSession stopRunning];
    [CaptureVideoPreviewLayerView removeFromSuperview];
}


/*
 防止UITextField被键盘遮盖
 */
- (BOOL)textFieldShouldReturn:(UITextField *)textField{
    [textField resignFirstResponder];
    return true;
}

-(void) NoitifinationCenterListener{
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(KeyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHidden:) name:UIKeyboardWillHideNotification object:nil];


}
-(BOOL) textFieldShouldBeginEditing:(UITextField *)textField {
    _EditTextField = textField;
    return YES;
}

-(void) KeyboardWillShow:(NSNotification *)notification {
    if(_EditTextField != nil){
        NSDictionary *userInfo = notification.userInfo;
        CGRect KeyboardFrameEndUserInfoKey = [[userInfo objectForKey:@"UIKeyboardFrameEndUserInfoKey"] CGRectValue];
        CGFloat marginBottom = [UIScreen mainScreen].bounds.size.height - _EditTextField.frame.size.height - _EditTextField.frame.origin.y - 5;
        CGFloat margin = marginBottom - KeyboardFrameEndUserInfoKey.size.height;
        if(margin <0){
            [self textFieldAnimations:-margin];
        }
    }
}

-(void) keyboardWillHidden:(NSNotification *)notification {
    _EditTextField = nil;
    [self textFieldAnimations:0];
}


-(void) textFieldAnimations:(CGFloat )move {
    CGRect frame = self.view.frame;
    //首尾式动画
    [UIView beginAnimations:nil context:nil];
    //执行动画
    //设置动画执行时间
    [UIView setAnimationDuration:0.25];
    //设置代理
    [UIView setAnimationDelegate:self];
    //设置动画执行完毕调用的事件
    //        [UIView setAnimationDidStopSelector:@selector(didStopAnimation)];
    self.view.bounds = CGRectMake(0,move, frame.size.width, frame.size.height) ;
    [UIView commitAnimations];
}

-(void) viewAnimations:(CGRect)bounds Duration:(CGFloat)time View:(UIView *)view{
    //首尾式动画
    [UIView beginAnimations:nil context:nil];
    //执行动画
    //设置动画执行时间
    [UIView setAnimationDuration:time];
    //设置代理
    [UIView setAnimationDelegate:self];
    //设置动画执行完毕调用的事件
    //        [UIView setAnimationDidStopSelector:@selector(didStopAnimation)];
    view.bounds = bounds ;
    [UIView commitAnimations];
}



//设置网络
-(void) netWorkWithString:(NSString *)string WithKey:(NSInteger )key HandlerBlock:(NetWorkReturnDictionary) block {
    string = [string stringByReplacingOccurrencesOfString:@" " withString:@""];
    NSString * encodingString = [string stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
    NSLog(@"%@",encodingString);
    AFHTTPSessionManager *session = [AFHTTPSessionManager manager];
    session.responseSerializer = [AFHTTPResponseSerializer serializer];
    session.requestSerializer.timeoutInterval = 30;
    [session GET:encodingString parameters:nil progress:^(NSProgress * _Nonnull downloadProgress) {

    } success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
        NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:responseObject options:NSJSONReadingMutableContainers | NSJSONReadingMutableLeaves error:nil];
        block(dic);
        if (![[dic objectForKey:@"Status"] boolValue]) {
            if(key == 1){
                NSString *msg;
                if ([LJTool isEmptyNilNullLength0:[dic objectForKey:@"Msg"]]) {
                    msg = @"操作失败！";
                }else{
                    msg = [[dic objectForKey:@"Msg"] stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
                }
                [LJTool setAlertViewControllerTittle:@"提示" Message:msg Button:@"我知道了" handlerBlock:^(UIAlertAction *action ) {

                } viewController:self];
            }

        }

    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
        [LJTool setAlertViewControllerTittle:@"提示" Message:@"网络连接失败，请检查网络！" Button:@"我知道了" handlerBlock:^(UIAlertAction *action) {

        } viewController:self];
    }];
}


- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

-(void) dealloc {
    [[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillHideNotification object:nil];
    [[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillShowNotification object:nil];
}

-(void) naviagtionControllerBarButtonItemBack{
    UIBarButtonItem *leftItem = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"activity_back.png"] style:UIBarButtonItemStylePlain target:self action:@selector(backViewcontroller)];
    [leftItem setBackgroundImage:[UIImage imageNamed:@"activity_back.png"] forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];

    self.navigationItem.backBarButtonItem = leftItem;
}

-(void) backViewcontroller{
    [self.navigationController popViewControllerAnimated:YES];
}


@end