警告：从指针生成整数而不进行强制转换

Question

我很困惑为什么会弹出这个警告。我在其他控制器上使用相同的程序，效果完美。

ConditionTableViewController.m:57: 警告：传递“initWithCondition:”的参数 1 从指针生成整数，无需强制转换

使用以下代码

- (void)managedObjectSelected:(NSManagedObject *)managedObject
{
// Load View
Condition *con = (Condition *)managedObject;
ConditionDetailViewController *detail = [[ConditionDetailViewController alloc] initWithCondition:con];

detail.title = [[managedObject valueForKey:@"cave"] valueForKey:@"title"];

self.navigationItem.backBarButtonItem =
[[[UIBarButtonItem alloc] initWithTitle:@"Back"
                                  style: UIBarButtonItemStyleBordered
                                 target:nil
                                 action:nil] autorelease];

[self.navigationController pushViewController:detail animated:YES];
[detail release];
}

在ConditionDetailViewController.h中

- (id)initWithCondition:(Condition *)aCondition;

这里“con”的控制台输出

2011-07-26 11:03:08.485 CaveConditions[10631:f203] <NSManagedObject: 0xe6628e0> (entity: Condition; id: 0xe6608b0 <x-coredata://368AFBD3-2C66-4ED7-977D-AB8EED8BB577/Condition/p149> ; data: {
    cave = "0x67486e0 <x-coredata://368AFBD3-2C66-4ED7-977D-AB8EED8BB577/Cave/p7>";
    ccId = 678;
    comment = "";
    diveDate = 1286830059;
    flow = "0xe668270 <x-coredata://368AFBD3-2C66-4ED7-977D-AB8EED8BB577/Flow/p1>";
    imageURL = "orbe_doof.jpg";
    insertDate = nil;
    ip = "xxx.xxx.xxx.xxx";
    line = "0xe668280 <x-coredata://368AFBD3-2C66-4ED7-977D-AB8EED8BB577/Line/p1>";
    percolation = "0xe668290 <x-coredata://368AFBD3-2C66-4ED7-977D-AB8EED8BB577/Percolation/p5>";
    sediment = "0xe6682a0 <x-coredata://368AFBD3-2C66-4ED7-977D-AB8EED8BB577/Sediment/p2>";
    temperature = 13;
    userMail = "[email protected]";
    username = "Hans K...";
    visibility = "0xe6682b0 <x-coredata://368AFBD3-2C66-4ED7-977D-AB8EED8BB577/Visibility/p7>";
})

根据要求包括

ConditionTableViewController.h

#import "CellTableViewController.h"
#import "Cave.h"

ConditionTableViewController.m（其中调用 ManagedObjectSelected 方法）

#import "ConditionTableViewController.h"
#import "ConditionDetailViewController.h"

ConditionDetailViewController.h

#import <UIKit/UIKit.h>
#import "Condition.h"
#import <QuartzCore/QuartzCore.h>

ConditionDetailViewController.m

#import "ConditionDetailViewController.h"
#import "DataProcessor.h"
#import "PhotoViewController.h"

Answer 1

initWithCondition: 是 Foundation 框架中 NSConditionLock 类的一个方法，它接受一个整数。我认为 Xcode 以某种方式混淆了两个类中的符号名称 initWithCondition:，并且使用了错误的版本。如果您的代码正确，包括在每个文件中导入正确的标头，则它可能是错误的索引或预编译标头。尝试从“管理器”窗口的“项目”部分删除项目的派生数据，然后重建项目。