我们如何创建iOS 7 Safari中的通用搜索文本字段。我知道如何创建Google搜索字段，但如何创建一个同时包含Google搜索和网址搜索的文本字段。
Google搜索字段：
-(void)SearchButtonClicked {
NSString *query = [maintext.text stringByReplacingOccurrencesOfString:@" " withString:@"+"];
NSString *urlString = [NSString stringWithFormat:@"%@", query];
// remember to change the view controller class in storyboard
MyWebViewController *webViewController = [self.storyboard instantiateViewControllerWithIdentifier:@"WebView"];
// urlString is a public property on MyWebViewController
webViewController.urlString = urlString;
[self presentViewController:webViewController animated:YES completion:nil];
}
- (IBAction)SearchButton:(id)sender {
NSString *query = [maintext.text stringByReplacingOccurrencesOfString:@" " withString:@"+"];
NSString *urlString = [NSString stringWithFormat:@"http://www.google.com/search?q=%@", query];
// remember to change the view controller class in storyboard
MyWebViewController *webViewController = [self.storyboard instantiateViewControllerWithIdentifier:@"WebView"];
// urlString is a public property on MyWebViewController
webViewController.urlString = urlString;
[self presentViewController:webViewController animated:YES completion:nil];
}
我的Webview控制器：
#import "MyWebViewController.h"
#import "ViewController.h"
#import <Social/Social.h>
#import "SIAlertView.h"
#import "TTAlertView.h"
#import "ETActivityIndicatorView.h"
@implementation MyWebViewController {
}
@synthesize searchField;
@synthesize webView;
ETActivityIndicatorView * etActivity;
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
NSURL *url = [NSURL URLWithString:self.urlString];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
[self.webView loadRequest:request];
}
-(void)webView:(UIWebView *)webBlog didFailLoadWithError:(NSError *)error{
if ([error code] != -999) {
NSLog(@"Could not load the dumb webPage");
//show error alert, etc.
TTAlertView *alert = [[TTAlertView alloc] initWithTitle:@"Internet Error"
message:@"Searched cannot open the page because your iPhone is not connected to the internet."
delegate:self
cancelButtonTitle:@"Dismiss"
otherButtonTitles:nil];
[alert show];
[etActivity setHidden:YES];
}else{
NSLog(@"Could not load the dumb web page...just might blame user!");
}
}
//Called whenever the view starts loading something
- (void)webViewDidStartLoad:(UIWebView *)webView {
[etActivity startAnimating];
[etActivity setHidden:NO];
}
//Called whenever the view finished loading something
- (void)webViewDidFinishLoad:(UIWebView *)webView {
[etActivity stopAnimating];
[etActivity setHidden:YES];
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
[webView setDelegate:self];
self.searchField.backgroundColor = [UIColor colorWithRed:255.0/255 green:255.0/255 blue:255.0/255 alpha:1.0f];
self.searchField.layer.cornerRadius = 3.0f;
self.searchField.placeholder = @"Search or enter address";
self.searchField.leftViewMode = UITextFieldViewModeAlways;
UIView* leftView1 = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 10, 10)];
self.searchField.leftView = leftView1;
//Setup handling of LEFT and RIGHT swipes
UISwipeGestureRecognizer *recognizer;
recognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeFrom:)];
[recognizer setDirection:(UISwipeGestureRecognizerDirectionRight)];
[[self view] addGestureRecognizer:recognizer];
recognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeFrom:)];
[recognizer setDirection:(UISwipeGestureRecognizerDirectionLeft)];
[[self view] addGestureRecognizer:recognizer];
self.searchField.delegate = self;
//ETActivityIndicatorView
etActivity = [[ETActivityIndicatorView alloc] initWithFrame:CGRectMake(0.0f, 0.0f, 60.0f, 60.0f)];
etActivity.center=self.view.center;
//you can set your custom color for ETActivityIndicatorView
etActivity.color = [UIColor colorWithRed:13.0/255 green:136.0/255 blue:236.0/255 alpha:1.0f];
[self.view addSubview:etActivity];
}
-(void)handleSwipeFrom:(UISwipeGestureRecognizer *)recognizer {
if (recognizer.direction == UISwipeGestureRecognizerDirectionRight) {
NSLog(@"Swipe Right");
[webView goBack];
}
if (recognizer.direction == UISwipeGestureRecognizerDirectionLeft) {
NSLog(@"Swipe Left");
[webView goForward];
}
}
#pragma mark - RNGridMenuDelegate
- (void)gridMenu:(RNGridMenu *)gridMenu willDismissWithSelectedItem:(RNGridMenuItem *)item atIndex:(NSInteger)itemIndex {
if (itemIndex == 0) {
NSLog(@"Reload");
[self.webView reload];
}
if (itemIndex == 1) {
NSLog(@"Facebook");
if([SLComposeViewController isAvailableForServiceType:SLServiceTypeFacebook]) //check if Facebook Account is linked
{
mySLComposerSheet = [[SLComposeViewController alloc] init]; //initiate the Social Controller
mySLComposerSheet = [SLComposeViewController composeViewControllerForServiceType:SLServiceTypeFacebook]; //Tell him with what social plattform to use it, e.g. facebook or twitter
[mySLComposerSheet setInitialText:[NSString stringWithFormat:@""]]; //the message you want to post
[self presentViewController:mySLComposerSheet animated:YES completion:nil];
}
[mySLComposerSheet setCompletionHandler:^(SLComposeViewControllerResult result) {
switch (result) {
case SLComposeViewControllerResultCancelled:
break;
case SLComposeViewControllerResultDone:
break;
default:
break;
} //check if everything worked properly. Give out a message on the state.
}];
}
if (itemIndex == 2) {
if ([SLComposeViewController isAvailableForServiceType:SLServiceTypeTwitter])
{
SLComposeViewController *tweetSheet = [SLComposeViewController
composeViewControllerForServiceType:SLServiceTypeTwitter];
[tweetSheet setInitialText:@""];
[self presentViewController:tweetSheet animated:YES completion:nil];
}
}
if (itemIndex == 3) {
NSLog(@"Home");
MyWebViewController *MainView = [self.storyboard instantiateViewControllerWithIdentifier:@"MainView"];
[self presentViewController:MainView animated:NO completion:nil];
}
}
- (void)showList {
NSInteger numberOfOptions = 4;
NSArray *options = @[
@"Reload",
@"Facebook",
@"Twitter",
@"Home",
];
RNGridMenu *av = [[RNGridMenu alloc] initWithTitles:[options subarrayWithRange:NSMakeRange(0, numberOfOptions)]];
av.delegate = self;
av.itemFont = [UIFont boldSystemFontOfSize:18];
av.itemSize = CGSizeMake(150, 55);
[av showInViewController:self center:CGPointMake(self.view.bounds.size.width/2.f, self.view.bounds.size.height/2.f)];
}
- (IBAction)onShowButton:(id)sender {
[self showList];
}
![enter image description here][1]
答案 0 :(得分：4)
Google Chrome假设在这些情况下输入的文字是网址：
http，https和ftp。/）开始。/）。localhost）。/）开始。?），可以假定其前面的部分为网址。在所有其他情况下，您可以放心地假设键入的文本是搜索词。
这不是完整的规则列表，但我认为这对于常规使用来说已经足够了。
主要参考：Chromium - Omnibox design principles。
<强> 更新
以下是一些提示，可帮助您将之前的规则转换为有效的代码（顺序很重要）：
（规则3 ）替换与此正则表达式匹配的文本部分：
\?.*$
使用空字符串@""，然后应用其他规则。
（规则1.1 ， 1.2 ， 1.4 ， 1.5 ， 2.1 < / strong>）匹配此正则表达式：
^((\/)|((https?|ftp):\S+$)|(\S+\/$)|(localhost$))
（规则1.3 ）您可以从上面的链接中收集一些流行的顶级域名，并从中形成一个正则表达式，如下所示：
\S+\.(com|net|org|....)$
（规则1.6 ）与此正则表达式匹配：
^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$
答案 1 :(得分：2)
使用此代码。这基本上检查输入文本字段的文本。如果它是一个完整的网址，那么它会直接重定向到它，否则输入的文字会在谷歌上搜索。
- (IBAction)SearchButton:(id)sender
{
MyWebViewController *webViewController = [self.storyboard instantiateViewControllerWithIdentifier:@"WebView"];
NSString *urlString = maintext.text;
if([urlString rangeOfString:@"//"].location == NSNotFound)
{
// to resolve a url according to rfc 1808 (the most common form of URL), it must contain '//' in it.
// appending '//' in the url string to check for valid url
urlString = [NSString stringWithFormat:@"//%@", urlString];
}
NSURL *url = [NSURL URLWithString:urlString];
if(url && (url.scheme || url.host) && ([urlString rangeOfString:@"."].location != NSNotFound))
{
// url is valid, it contains domain and host
webViewController.urlString = maintext.text;
}
else
{
NSString *query = [maintext.text stringByReplacingOccurrencesOfString:@" " withString:@"+"];
NSString *urlString = [NSString stringWithFormat:@"http://www.google.com/search?q=%@", query];
// urlString is a public property on MyWebViewController
webViewController.urlString = urlString;
}
[self presentViewController:webViewController animated:YES completion:nil];
}
对于额外的检查，您还可以检查网址是否有效，例如ping它并检查它是否响应。
答案 2 :(得分：0)
您可以创建一个类别：
@interface NSString (NSStringValidator)
- (BOOL)isValidEmail;
- (BOOL)isValidURL;
@end
@implementation NSString (NSStringValidator)
- (BOOL)isValidEmail {
NSString *regExpPattern = @"\\b([a-zA-Z0-9%_.+\\-]+)@([a-zA-Z0-9.\\-]+?\\.[a-zA-Z]{2,6})\\b";
NSError *errorNext = NULL;
NSRegularExpression *regexNext = [NSRegularExpression regularExpressionWithPattern:regExpPattern
options:NSRegularExpressionCaseInsensitive
error:&errorNext];
NSRange range = [regexNext rangeOfFirstMatchInString:self
options:NSRegularExpressionCaseInsensitive
range:NSMakeRange(0, self.length)];
return NSEqualRanges(range, NSMakeRange(0, self.length));
}
- (BOOL)isValidURL {
NSString *regExpPattern = @"(?i)(?:(?:https?):\\/\\/)?(?:\\S+(?::\\S*)?@)?(?:(?:[1-9]\\d?|1\\d\\d|2[01]\\d|22[0-3])(?:\\.(?:1?\\d{1,2}|2[0-4]\\d|25[0-5])){2}(?:\\.(?:[1-9]\\d?|1\\d\\d|2[0-4]\\d|25[0-4]))|(?:(?:[a-z\\u00a1-\\uffff0-9]+-?)*[a-z\\u00a1-\\uffff0-9]+)(?:\\.(?:[a-z\\u00a1-\\uffff0-9]+-?)*[a-z\\u00a1-\\uffff0-9]+)*(?:\\.(?:[a-z\\u00a1-\\uffff]{2,})))(?::\\d{2,5})?(?:\\/[^\\s]*)?";
NSError *errorNext = NULL;
NSRegularExpression *regexNext = [NSRegularExpression regularExpressionWithPattern:regExpPattern
options:NSRegularExpressionCaseInsensitive
error:&errorNext];
NSRange range = [regexNext rangeOfFirstMatchInString:self
options:NSRegularExpressionCaseInsensitive
range:NSMakeRange(0, self.length)];
return NSEqualRanges(range, NSMakeRange(0, self.length));
}
@end
然后调用类别方法：
- (BOOL)textFieldShouldReturn:(UITextField *)theTextField
{
[theTextField resignFirstResponder];
if (theTextField.text.isValidURL) {
//open site
} else {
//search text
}
return YES;
}