NSString通過方法賦值，但另一種方法無法檢索到這個值（Objective C）

Question

我目前正在使用一個Objective-C程序來編碼和解碼消息。雖然我有一個問題。我有一個名爲Sys_Type的NSString，它存儲系統設置爲的設置（編碼或解碼）。當我的NSLog NSString的在設置當我把它在功能上正確的值不過返回其值的函數：

- （IBAction爲）addData：（ID）發送

該值爲空。我不知道爲什麼會發生這種情況，有人可以幫忙嗎？

我已附加AppDelegate.h & .m，因爲這是具有兩種功能的類。

---

AppDelegate.h

#import <Cocoa/Cocoa.h> 

@interface AppDelegate : NSObject <NSApplicationDelegate> { 
    @private 

    IBOutlet NSBox *Box; 
    IBOutlet NSTextField *Label; 
    IBOutlet NSButton *Encode; 
    IBOutlet NSButton *Decode; 
    NSString *data; 

    NSString *Sys_Type; 
} 

@end 

---

AppDelegate.m

#import "AppDelegate.h" 
#include "MasterView.h" 

@interface AppDelegate() 

@property (weak) IBOutlet NSWindow *window; 
@property (nonatomic, strong) IBOutlet MasterView *masterView; 
@property (assign) IBOutlet NSWindow *textInput_Sheet; 

@end 

@implementation AppDelegate 

- (void)applicationDidFinishLaunching:(NSNotification *)aNotification { 
    // Create the master View 
    self.masterView = [[MasterView alloc] initWithNibName:@"MasterView" bundle:nil]; 
} 

- (void)applicationWillTerminate:(NSNotification *)aNotification { 
    // Insert code here to tear down your application 
} 

- (IBAction)Encode:(id)sender { 
    Sys_Type = @"ENCODE"; 

    // Hide system setup 
    Box.hidden = true; 
    Label.hidden = true; 
    Encode.hidden = true; 
    Decode.hidden = true; 

    // Add the view to the Window's content view 
    [self.window.contentView addSubview:self.masterView.view]; 
    self.masterView.view.frame = ((NSView*)self.window.contentView).bounds; 

    // Set view to encode 
    [self.masterView SetType:Sys_Type]; 

    NSLog(@"Sys: %@",Sys_Type); 
} 

- (IBAction)Decode:(id)sender { 
    Sys_Type = @"DECODE"; 

    // Hide system setup 
    Box.hidden = true; 
    Label.hidden = true; 
    Encode.enabled = false; 
    Encode.hidden = true; 
    Decode.enabled = false; 
    Decode.hidden = true; 

    // Add the view to the Window's content view 
    [self.window.contentView addSubview:self.masterView.view]; 
    self.masterView.view.frame = ((NSView*)self.window.contentView).bounds; 

    // Set view to encode 
    [self.masterView SetType:Sys_Type]; 

    NSLog(@"Sys: %@",Sys_Type); 
} 

- (void)clearView { 

    [self.window.contentView removeView:self.masterView.view]; 
} 

- (IBAction)Reset:(id)sender { 
    NSLog(@"reset fired"); 

    // Show system setup 
    Box.hidden = false; 
    Label.hidden = false; 
    Encode.enabled = true; 
    Encode.hidden = false; 
    Decode.enabled = true; 
    Decode.hidden = false; 

    // Clear view 
    [self clearView]; // This isn't working, this is another issue, but not the main one :) 
} 

- (IBAction)addData:(id)sender { 
    NSLog(@"Button Fired"); 
    NSLog(@"Sys: %@",Sys_Type); 

    /* * * * * * * * * * * * * * * 
    * Key:      * 
    * 0 - MasterView Data Adder * 
    * 1 - Text input ok   * 
    * 2 - File input ok   * 
    * * * * * * * * * * * * * * */ 

    if ([Sys isEqualToString:@"ENCODE"]) { 
     NSLog(@"Fired"); 

     // This is where the specific sheet will be loaded 


    } else if ([Sys_Type isEqualToString:@"DECODE"]) { 

    } 
} 

- (IBAction)Add_Image:(id)sender { 

} 

- (IBAction)Start_Sys:(id)sender { 

} 

@end 

非常感謝你提前：d

Answer 1

in addData:你在其他方法Sys_Type中登錄Sys。檢查你的變量命名。