ios - 局部声明隐藏实例变量 - 属性和综合

Question

更新0

您是否要将所有 deals 更改为 _deals，将所有 iboards 更改为 _iboards 并添加下面的方法，然后在 processPbn 方法的末尾调用它？如果是这样，调用是什么样的？

- (id)initWithName:(NSInteger )_iboard deals:(NSArray *)_deals
{
    self = [super init];
    if (self) {
       iboard = _iboard;
        deals = _deals;
        return self;
    }
    return nil;
}

更新0

我想让 2 个变量 deals 和 iboards(在 BSViewcontroller 中计算)可在 BSdealViewController< 中使用。我在 BSViewController.m 末尾(最后 3 行)的代码中遇到以下两个语义问题。

"Local declaration of 'deals' hides instance variable"
"Local declaration of 'iboards' hides instance variable"

BSViewController.h

#import <UIKit/UIKit.h>
@interface BSViewController : UIViewController <....>
        {
            NSInteger iboard;
            NSArray *deals;
            }
@property (nonatomic) NSInteger iboard;
@property (nonatomic, strong) NSArray *deals;
- (void) processPbn;
@end

BSViewController.m

#import "BSViewController.h"
@interface BSViewController ()

@end
@implementation BSViewController
@synthesize iboard, deals;

- (void) processPbn
{
    NSURLRequest *theRequest = [NSURLRequest .....];

    [NSURLConnection sendAsynchronousRequest:theRequest queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *connection, NSData *data, NSError *error)
     {
         NSString *string = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
         NSString *sp = @"             ";
         NSArray*deals=@[[@[sp, sp, sp, sp]mutableCopy],[@[sp, sp, sp, sp]mutableCopy],[@[sp, sp, sp, sp]mutableCopy],[@[sp, sp, sp, sp]mutableCopy],[@[sp, sp, sp, sp]mutableCopy],[@[sp, sp, sp, sp]mutableCopy]];

         NSString *toMatch = @"...";

         int iboard = 0;
         NSRegularExpression *regex = [....];
         NSUInteger numberOfMatches = [....];
         for (NSTextCheckingResult* board in [.....])
         {
             for (NSUInteger irange = 1; irange < board.numberOfRanges; ++irange)
             {
                 NSRange matchedRange = [board rangeAtIndex: irange];
                 NSString* tstring = [string substringWithRange: matchedRange];
                 for (NSUInteger ix = 0; ix < tstring.length; ++ix)
                 {
                     NSRange cardInSuit = NSMakeRange(ix, 1);
                     int seat = (irange-1)/4 ;
                     int suit = (irange-1)%4 ;
                     NSString* replace= [deals[iboard][suit] ....];
                     [deals[iboard] replaceObjectAtIndex: suit withObject: replace];
                 }
             }
             ++iboard;
         }
     }];
}

@end

(由于上述原因？)我还收到错误在下面的 NSLog 指令中使用未声明的标识符“iboard”。

BSdealViewController.m

#import "BSdealViewController.h"
#import "BSViewController.h"

@interface BSdealViewController ()

@end
- (void)viewDidLoad
{
    NSLog(@"iboard : %@", iboard);
}

Answer 1

"Local declaration of 'deals' hides instance variable"
"Local declaration of 'iboard' hides instance variable"

您的方法中有名为 deals 的变量，该变量与具有相同名称的 ivar 发生冲突。

NSString *toMatch = @"...";

     int iboard = 0;
         ^^^^^^

     NSRegularExpression *regex = [....];

另外，

NSString *sp = @"             ";
NSArray*deals=@[[@[sp, sp, sp, sp]mutableCopy],[@[sp, sp, sp, sp]mutableCopy],[@[sp, sp, sp, sp]mutableCopy],[@[sp, sp, sp, sp]mutableCopy],[@[sp, sp, sp, sp]mutableCopy],[@[sp, sp, sp, sp]mutableCopy]];
        ^^^^^

将方法名称中的变量更改为 aDeals 和 aIboards 或与 ivars 不同的内容。