Question

我知道,这方面已经存在几个问题,我一直通过这些问题。

When I debug, a line of code that calls a delegate method appears to be ignored. here s the line: [_delegate insertDataLocation:dbLocation Time:dbTime Reminder:dbReminder];

我假定,这是代表没有适当确定的问题,因此,我在此指出:

www.un.org/Depts/DGACM/index_french.htm

@protocol mapDelegate;

@interface ViewController : UIViewController

@property (strong, nonatomic) id<mapDelegate> delegate;

ViewController.m

@synthesize delegate = _delegate;

- (void)viewDidLoad
{
[super viewDidLoad];
[self setDelegate:_delegate];
}

//Here s where I call the method, FYI
[_delegate insertDataLocation:dbLocation Time:dbTime Reminder:dbReminder];

<>AppDelegate.h

@protocol mapDelegate
-(void)insertDataLocation:(NSString*)l Time:(NSString*)t Reminder:(NSString*)r;
@end

@interface AppDelegate : UIResponder <UIApplicationDelegate, mapDelegate>

AppDelegate.m

-(void)insertDataLocation:(NSString*)l Time:(NSString*)t Reminder:(NSString*)r {
//Here s my method s code
}

Answer 1

(1) 删除<代码>id<mapDelegate> 代表:在您的档案开始时声明。你把你的财产与你所说的“美化声明”中的一种变数挂钩,因此另一个变数令人误解。

2) 你们说,“在什么时候,如何确定,”但我看不出什么实际上使代表成为某些目标。

3) Using self.delegate rather than _delegate inside normal methods is usually a better idea.

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