后台返回数据如下
HTTP/1.1 200 OK
Server: Apache-Coyote/1.1
X-Content-Type-Options: nosniff
X-XSS-Protection: 1; mode=block
Cache-Control: no-cache, no-store, max-age=0, must-revalidate
Pragma: no-cache
Expires: 0
Content-Disposition: attachment; filename="444ccd88d31c4eb8873606b12a360013.pdf"
Content-Type: application/octet-stream;charset=UTF-8
Transfer-Encoding: chunked
Date: Tue, 17 Jul 2018 06:24:27 GMT
//
- (WKWebView*)mWebView {
if(_mWebView==nil) {
_mWebView = [[WKWebView alloc] init];
_mWebView.UIDelegate=self;
_mWebView.navigationDelegate = self;
[_mWebView setTranslatesAutoresizingMaskIntoConstraints:NO];
[self.view addSubview:_mWebView];
NSLayoutConstraint *constraint1 = [NSLayoutConstraint constraintWithItem:_mWebView attribute:NSLayoutAttributeTrailing relatedBy:NSLayoutRelationEqual toItem:self.view attribute:NSLayoutAttributeTrailing multiplier:1 constant:0];
NSLayoutConstraint *constraint2 = [NSLayoutConstraint constraintWithItem:_mWebView attribute:NSLayoutAttributeLeading relatedBy:NSLayoutRelationEqual toItem:self.view attribute:NSLayoutAttributeLeading multiplier:1 constant:0];
NSLayoutConstraint *constraint3 = [NSLayoutConstraint constraintWithItem:_mWebView attribute:NSLayoutAttributeBottom relatedBy:NSLayoutRelationEqual toItem:self.view attribute:NSLayoutAttributeBottom multiplier:1 constant:0];
NSLayoutConstraint *constraint4 = [NSLayoutConstraint constraintWithItem:_mWebView attribute:NSLayoutAttributeTop relatedBy:NSLayoutRelationEqual toItem:self.view attribute:NSLayoutAttributeTop multiplier:1 constant:0];
[self.viewaddConstraint:constraint1];
[self.viewaddConstraint:constraint2];
[self.viewaddConstraint:constraint3];
[self.viewaddConstraint:constraint4];
[self.view layoutIfNeeded];
}
return _mWebView;
}
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
NSURL *url = [NSURL URLWithString:self.url];
[self.mWebView loadRequest:[NSURLRequest requestWithURL:url cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:30]];
}
//如果不添加如下实现，pdf展示时，是以类似于txt方式呈现
- (void)webView:(WKWebView*)webView decidePolicyForNavigationResponse:(WKNavigationResponse*)navigationResponse decisionHandler:(void(^)(WKNavigationResponsePolicy))decisionHandler {
decisionHandler(WKNavigationResponsePolicyAllow);
NSLog(@"%s", __FUNCTION__);
}
