我有兩個錯誤：不可見@interface「UIWebView的」

Question

我有兩個錯誤：「UIWebView的」不可見@interface聲明選擇「highlightAllOccurencesOfString：」

另一個問題：對「的UIWebView無可見@interface '宣佈選擇'removeAllHighlights' 請有人幫助我。

WBSecondViewController.h

#import <UIKit/UIKit.h> 
@interface WBSecondViewController : UIViewController <UIWebViewDelegate, UIScrollViewDelegate>{ 
} 

@property (weak, nonatomic) IBOutlet UIWebView *webView; 

@property(copy) NSArray *menuItems; 

@property (weak, nonatomic) IBOutlet UIToolbar *webToolBar; 
- (IBAction)back:(id)sender; 
- (IBAction)foward:(id)sender; 

-(IBAction)searchButtonPressed:(id)sender; 
-(IBAction)clearHighlights:(id)sender; 
@end 

WBSecondViewController.m

#import "WBSecondViewController.h" 
#import "Word.h" 
#import "WordController.h" 
#import "AddWordController.h" 
#import "WBAppDelegate.h" 
#import "WBFirstViewController.h" 
#import "SearchWebView.h" 

@interface WBSecondViewController() 

@end 

@implementation WBSecondViewController 

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil{ 
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; 
if (self) { 
    self.title = NSLocalizedString(@"Second", @"Second"); 
    self.tabBarItem.image = [UIImage imageNamed:@"second"]; 
} 
return self; 
} 

- (void)viewDidLoad 
{ 
UIMenuController *menu = [UIMenuController sharedMenuController]; 

[super viewDidLoad]; 
NSURL *theURL = [NSURL URLWithString:@"http://www.google.co.jp"]; 
[_webView loadRequest:[NSURLRequest requestWithURL:theURL]]; 
} 
-(IBAction)searchButtonPressed:(id)sender{ 

[_webView highlightAllOccurencesOfString:@"cat"]; 
} 

-(IBAction)clearHighlights:(id)sender{ 

[_webView removeAllHighlights]; 

} 

SearchWebView.h

#import <Foundation/Foundation.h> 

@interface SearchWebView : UIWebView 

- (NSInteger)highlightAllOccurencesOfString:(NSString*)str; 
- (void)removeAllHighlights; 

@end 

SearchWebView.m

#import "SearchWebView.h" 

@implementation SearchWebView 

- (NSInteger)highlightAllOccurencesOfString:(NSString*)str 
{ 
NSString *path = [[NSBundle mainBundle] pathForResource:@"UIWebViewSearch" ofType:@"js"]; 
NSString *jsCode = [NSString stringWithContentsOfFile:path encoding:NSUTF8StringEncoding error:nil]; 
[self stringByEvaluatingJavaScriptFromString:jsCode]; 

NSString *startSearch = [NSString  stringWithFormat:@"uiWebview_HighlightAllOccurencesOfString('%@')",str]; 
[self stringByEvaluatingJavaScriptFromString:startSearch]; 

NSString *result = [self stringByEvaluatingJavaScriptFromString:@"uiWebview_SearchResultCount"]; 
return [result integerValue]; 
} 

- (void)removeAllHighlights 
{ 
[self stringByEvaluatingJavaScriptFromString:@"uiWebview_RemoveAllHighlights()"]; 
} 

@end 

Answer 1

U有子類uiwebview，並將其稱爲SearchWebView，但隨後在您的wbsecondviewcontroller中創建Web視圖的實例時，將使用常規Web視圖而不是您創建的子類，而常規Web視圖不具有兩個額外方法您爲該自定義定義的那個。上面的@interface在wbsecondviewcontroller.h中做@class SearchWebView。然後，在聲明屬性UiWebView的地方，將其聲明爲SearchWebView。在wbsecondviewcontroller的.m文件中做#import "SearchWebView.h"