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84 lines
2.8 KiB
Objective-C
84 lines
2.8 KiB
Objective-C
//
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// PreviewViewController.m
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// Blog
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//
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// Created by Sami Samhuri on 2015-04-19.
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// Copyright (c) 2015 Guru Logic Inc. All rights reserved.
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//
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#import "PreviewViewController.h"
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@interface PreviewViewController () <UIWebViewDelegate>
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@property (weak, nonatomic) IBOutlet UIWebView *webView;
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@end
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@implementation PreviewViewController
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- (void)viewWillAppear:(BOOL)animated {
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[super viewWillAppear:animated];
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if (self.initialRequest) {
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if (self.promise) {
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__weak __typeof__(self) welf = self;
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self.promise.then(^{
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__typeof__(self) self = welf;
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[self.webView loadRequest:self.initialRequest];
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}).finally(^{
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__typeof__(self) self = welf;
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self.promise = nil;
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});
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}
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else {
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[self.webView loadRequest:self.initialRequest];
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}
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}
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}
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- (void)setInitialRequest:(NSURLRequest *)initialRequest {
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_initialRequest = initialRequest;
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[self.webView loadHTMLString:@"<!doctype html><html><head><title></title></head><body></body></html>" baseURL:nil];
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}
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#pragma mark - State restoration
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static NSString *const StateRestorationInitialRequestKey = @"initialRequest";
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static NSString *const StateRestorationWebViewRequestURLKey = @"webView.request.URL";
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- (void)encodeRestorableStateWithCoder:(NSCoder *)coder {
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[coder encodeObject:self.initialRequest forKey:StateRestorationInitialRequestKey];
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[coder encodeObject:self.webView.request.URL forKey:StateRestorationWebViewRequestURLKey];
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[super encodeRestorableStateWithCoder:coder];
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}
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- (void)decodeRestorableStateWithCoder:(NSCoder *)coder {
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NSURL *url = [coder decodeObjectForKey:StateRestorationWebViewRequestURLKey];
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if (url) {
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[self.webView loadRequest:[NSURLRequest requestWithURL:url]];
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}
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else {
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self.initialRequest = [coder decodeObjectForKey:StateRestorationInitialRequestKey];
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}
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[super decodeRestorableStateWithCoder:coder];
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}
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#pragma mark - UIWebViewDelegate methods
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- (void)webViewDidFinishLoad:(UIWebView *)webView {
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if ([webView.request.URL isEqual:self.initialRequest.URL]) {
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self.initialRequest = nil;
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}
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}
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- (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error {
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UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"Error" message:error.localizedDescription preferredStyle:UIAlertControllerStyleAlert];
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__weak __typeof__(self) welf = self;
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[alertController addAction:[UIAlertAction actionWithTitle:@"Dismiss" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
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__typeof__(self) self = welf;
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[self dismissViewControllerAnimated:YES completion:nil];
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}]];
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[self presentViewController:alertController animated:YES completion:nil];
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}
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@end
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