ShowPDFWebViewController.m

//
//  ShowPDFWebViewController.m
//  redstar
//
//  Created by admin on 16/1/14.
//  Copyright © 2016年 ZWF. All rights reserved.
//

#import "ShowPDFWebViewController.h"
#import <MBProgressHUD.h>

@interface ShowPDFWebViewController ()
@property (nonatomic, strong) UIWebView *webView;
@end

@implementation ShowPDFWebViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    [self setupNav];
    
    NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL fileURLWithPath:self.url]];
    [self.webView loadRequest:request];

}


- (void)setupNav
{
    UILabel *customLab = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 40, 30)];
    [customLab setTextColor:[UIColor whiteColor]];
    [customLab setText:self.fileName];
    customLab.font = [UIFont boldSystemFontOfSize:19];
    self.navigationItem.titleView = customLab;
    
    
    UIButton *backBtn = [UIButton buttonWithType:UIButtonTypeCustom];
    backBtn.frame = CGRectMake(0, 0, 30, 44);
    
    [backBtn setImage:[UIImage imageNamed:@"back_btn"] forState:UIControlStateNormal];
    [backBtn addTarget:self action:@selector(doBack:) forControlEvents:UIControlEventTouchUpInside];
    
    UIBarButtonItem *backItem = [[UIBarButtonItem alloc] initWithCustomView:backBtn];
    self.navigationItem.leftBarButtonItem = backItem;
}

- (void)doBack:(UIBarButtonItem *)sender
{
    [self.navigationController popViewControllerAnimated:YES];
}

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

- (UIWebView *)webView
{
    if (!_webView) {
        _webView = [[UIWebView alloc] initWithFrame:[UIScreen mainScreen].bounds];
        _webView.translatesAutoresizingMaskIntoConstraints = NO;
        [self.view addSubview:_webView];
        
        
        NSLayoutConstraint *tableTop = [NSLayoutConstraint constraintWithItem:_webView attribute:NSLayoutAttributeTop relatedBy:NSLayoutRelationEqual toItem:self.view attribute:NSLayoutAttributeTop multiplier:1.0 constant:0];
        [self.view addConstraint:tableTop];
        
        NSLayoutConstraint *tableLeft = [NSLayoutConstraint constraintWithItem:_webView attribute:NSLayoutAttributeLeft relatedBy:NSLayoutRelationEqual toItem:self.view attribute:NSLayoutAttributeLeft multiplier:1.0 constant:0];
        [self.view addConstraint:tableLeft];
        
        NSLayoutConstraint *tableRight = [NSLayoutConstraint constraintWithItem:_webView attribute:NSLayoutAttributeRight relatedBy:NSLayoutRelationEqual toItem:self.view attribute:NSLayoutAttributeRight multiplier:1.0 constant:0];
        [self.view addConstraint:tableRight];
        
        NSLayoutConstraint *tableBottom = [NSLayoutConstraint constraintWithItem:_webView attribute:NSLayoutAttributeBottom relatedBy:NSLayoutRelationEqual toItem:self.view attribute:NSLayoutAttributeBottom multiplier:1.0 constant:0];
        [self.view addConstraint:tableBottom];

    }
    return _webView;
}

/*
#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    // Get the new view controller using [segue destinationViewController].
    // Pass the selected object to the new view controller.
}
*/

@end