3

如何在控制台窗口中打印出 UITables indexPath.row。我不想到处添加 NSLogs。

我不断收到“不是会员”或财产。

(lldb) expr (int) printf("%d \n",self.lastChangedIndexPath->_row)
error: 'NSIndexPath' does not have a member named '_row'


(lldb) print self.lastChangedIndexPath->_row
error: 'NSIndexPath' does not have a member named '_row'


(lldb) print self.lastChangedIndexPath->row
error: 'NSIndexPath' does not have a member named 'row'


(lldb) print self.lastChangedIndexPath.row
error: property 'row' not found on object of type 'NSIndexPath *'


(lldb) po  self.lastChangedIndexPath.row
error: property 'row' not found on object of type 'NSIndexPath *'

我认为因为 row 和 section 属于 UITableView 类别：

@interface NSIndexPath (UITableView)

+ (NSIndexPath *)indexPathForRow:(NSInteger)row inSection:(NSInteger)section;

@property(nonatomic,readonly) NSInteger section;
@property(nonatomic,readonly) NSInteger row;

@end

我什至创建了一个迷你测试应用程序并创建了一个名为 MyIndexPath 的 NSIndexPath 克隆，我可以使用以下命令正常访问它：

(lldb) print self.indexPath->_row
(NSInteger) $0 = 10
(lldb) print self.indexPath.row
(NSInteger) $1 = 10
(lldb)

测试应用

#import "ViewController.h"    



#pragma mark -
#pragma mark CLONE OF NSIndexPath ===================================
#pragma mark -
//------ a clone on NSindexPath with same section and row properties
@interface MyIndexPath : NSObject
@property(nonatomic) NSInteger section;
@property(nonatomic) NSInteger row;

@end
@implementation MyIndexPath
@end



#pragma mark -
#pragma mark MAIN CLASS that has MyIndexPath as iVar =============================
#pragma mark -

@interface ViewController (){
    NSString * _iVarString;
    int        _iVarInt;

}
@property (nonatomic, retain) NSString  * propertyString;
@property (nonatomic        ) NSInteger   propertyInt;
@property (nonatomic, retain) MyIndexPath * indexPath;
@end


@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    //Set iVars
    _iVarString = @"hello ivar";
    _iVarInt = 34;

    //Set properties (and synthesized ivars _propertyString and _propertyInt)
    self.propertyString = @"my propertyString";
    self.propertyInt    = 46;

    //Local vars
    NSString * localString_ = @"hello";
    int        localInt_    = 10;

    //------
    self.indexPath = [[MyIndexPath alloc]init];
    self.indexPath.section = 10;
    self.indexPath.row = 10;


    NSLog(@"PUT BREAKPOINT HERE");

}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

而且我可以很好地访问它——只是不在 UITableView 类别中。

(lldb) print self.indexPath->_row
(NSInteger) $0 = 10
(lldb) print self.indexPath.row
(NSInteger) $1 = 10
(lldb)
4

2 回答 2

28

If lldb does not know about a property then you can always use the accessor function:

print (NSInteger) [self.lastChangedIndexPath row]
于 2013-06-14T14:49:35.957 回答
13

您可以通过双击 nsindexpath 变量并设置以下摘要格式来使 Xcode 在变量窗口中显示索引路径：

section:{(int)[$VAR section]},row:{(int)[$VAR row]}
于 2013-09-03T13:19:15.957 回答