zuoyebang/tongxin/VC/More/CommonProblems/QDetailViewController.m

//
//  QDetailViewController.m
//  tongxin
//
//  Created by WeiChaoZheng on 2018/11/8.
//  Copyright © 2018年 xTT. All rights reserved.
//

#import "QDetailViewController.h"

@interface QDetailViewController ()<WKNavigationDelegate,WKUIDelegate>

@end

@implementation QDetailViewController
//详细的问题页面
- (void)viewDidLoad {
    [super viewDidLoad];
    self.title = @"常见问题";
    self.titleLabel.text = self.titleStr;
    self.view.backgroundColor = tabViewBG;
//    self.contentView.layer.cornerRadius = 5;
//    self.contentView.layer.masksToBounds = YES;
    self.webView = [[WKWebView alloc] initWithFrame:CGRectZero];
    [self.contentView addSubview:self.webView];
    self.webView.UIDelegate = self;
    self.webView.navigationDelegate = self;
    self.webView.scrollView.bounces = NO;
    [self.webView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.right.equalTo(self.view);
        make.top.equalTo(self.view).offset(iPhoneX_NavHeight);
        make.bottom.equalTo(self.view.mas_bottom);
    }];
    self.webView.hidden = YES;
    
    if(self.content){
        [self.webView loadHTMLString:[NSString stringWithFormat:@"%@%@",@"<meta name=\"viewport\" content=\"width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no\" />",self.content] baseURL:nil];
    }else{
        if(self.url){
            [self.webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:self.url]]];
        }
        
    }
}
// 页面加载完成之后调用 此方法会调用多次
- (void)webView:(WKWebView *)webView didFinishNavigation:(null_unspecified WKNavigation *)navigation {
    [UICommon HidenLoading];
    self.webView.hidden = NO;
    WEAKSELF
    //获取内容实际高度（像素）@"document.getElementById(\"content\").offsetHeight;"
    [_webView evaluateJavaScript:@"document.body.scrollHeight" completionHandler:^(id _Nullable result,NSError * _Nullable error) {
        // 此处js字符串采用scrollHeight而不是offsetHeight是因为后者并获取不到高度，看参考资料说是对于加载html字符串的情况下使用后者可以，但如果是和我一样直接加载原站内容使用前者更合适
        //获取页面高度，并重置webview的frame
        double contentViewHeight = [result doubleValue]+45;
        // 15 是 contentView 距离顶部的 距离 ,10 是距离底部的距离
        CGFloat maxHeight = ScreenHeight-getRectNavAndStatusHight - 15 - 10;
        
        if(contentViewHeight > maxHeight){
            contentViewHeight = maxHeight;
        }
        if(contentViewHeight > weakSelf.contentViewHeightNSLC.constant){
            dispatch_async(dispatch_get_main_queue(), ^{
                weakSelf.contentViewHeightNSLC.constant = contentViewHeight;
            });
        }
        
    }];
    NSLog(@"结束加载");
    
}
- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

/*
#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