View Controller和UIView之间的简单委托不起作用

Question

因此,当在主视图顶部作为叠加层生成的子视图上按下按钮时,我使用一个简单的委托来从主视图控制器访问一个函数.由于某种原因,源视图控制器中定义的函数未被执行.我这样做了100次,觉得我只是错过了一些愚蠢的东西.这是代码怎么没有工作？

Source ViewController's.h:

#import <UIKit/UIKit.h>
#import "ProfileSettingsViewController.h"
#import "ImageViewer.h"

@interface ProfileViewController : UIViewController <UITextFieldDelegate, UIImagePickerControllerDelegate, UINavigationControllerDelegate, subViewDelegate>

源viewController.m:

#import <Parse/Parse.h>
#import <QuartzCore/QuartzCore.h>
#import "ImageViewer.h"
#import "ProfileViewController.h"

@interface ProfileViewController () <UITextFieldDelegate, UIImagePickerControllerDelegate, UINavigationControllerDelegate, subViewDelegate>

@end

//where the ImageViewer object is defined    
@implementation ProfileViewController
{
    NSMutableArray *dataArray;
    ImageViewer *loadImageViewer;
}

//where the UIView is initialized
- (void) handleImageTap:(UIGestureRecognizer *)gestureRecognizer
{
    if ([gestureRecognizer view] == _profilePic)
    {
        loadImageViewer = [ImageViewer alloc];
        [loadImageViewer loadImageIntoViewer:self imageToLoad:_profilePic.image];
    }
    else if ([gestureRecognizer view] == _coverPhoto)
    {

    }
}

目的地视图.h

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

@protocol subViewDelegate
-(void)photoFromSubview:(id)sender;
@end

@interface ImageViewer : UIView

@property (nonatomic, assign) id <subViewDelegate> delegate;
@property (nonatomic, copy) UIImage *mainImage;
@property (nonatomic, copy) UIViewController *parentView;

- (void)fromCameraRoll;
- (void)takePhoto;
- (void)removeImageViewer;
- (void)captureImage:(id)sender;
- (void)uploadPhoto:(id)sender;
- (UIImage *)addBackground;
- (ImageViewer *)loadImageIntoViewer:(UIViewController *)superView imageToLoad:(UIImage *)imageToLoad;

@end

目的地视图.m

#import "ImageViewer.h"

@implementation ImageViewer : UIView

//synthesize properties
@synthesize mainImage = _mainImage;
@synthesize parentView = _parentView;

//initialize the image viewer
- (ImageViewer *)loadImageIntoViewer:(UIViewController *)superView imageToLoad:(UIImage *)imageToLoad
{
    //create a new view with the same frame size as the superView
    ImageViewer *imageViewer = [[ImageViewer alloc] initWithFrame:superView.view.bounds];
    _mainImage = imageToLoad;
    _parentView = superView;

    //if something's gone wrong, abort!
    if(!imageViewer)
    {
        return nil;
    }

    //add all components and functionalities to the program
    UIImageView *background = [[UIImageView alloc] initWithImage:[imageViewer addBackground]];
    background.alpha = 0.85;
    [imageViewer addSubview:background];
    [imageViewer addSubview:[imageViewer addImageToView:_mainImage superView:superView.view]];
    [imageViewer addSubview:[imageViewer addButtonToView:(superView.view.bounds.origin.x + 10.0) yPos:(superView.view.bounds.origin.x + 10.0) buttonAction:@selector(back:) buttonTitle:@"Back"]];
    [imageViewer addSubview:[imageViewer addButtonToView:(superView.view.bounds.origin.x + 10.0) yPos:((superView.view.center.y/2) + 270.0) buttonAction:@selector(captureImage:) buttonTitle:@"Camera"]];
    [imageViewer addSubview:[imageViewer addButtonToView:(superView.view.bounds.origin.x + 105.0) yPos:((superView.view.center.y/2) + 270.0) buttonAction:@selector(uploadPhoto:) buttonTitle:@"Upload"]];
    [imageViewer addSubview:[imageViewer addButtonToView:(superView.view.bounds.origin.x + 200.0) yPos:((superView.view.center.y/2) + 270.0) buttonAction:@selector(rotatePhoto:) buttonTitle:@"Rotate"]];
    [superView.view addSubview:imageViewer];

    return imageViewer;
}

//call delegate method
- (void)captureImage:(id)sender
{
    [self.delegate photoFromSubview:self];
}

我搞砸了什么不是吗？

Answer 1

调试此方法的最佳方法是使用断点并查看调用的内容以及不调用的内容(并检查您的委托是否已正确设置).在我的头脑中,我会说如果你使用IB,你要么忘记了代表的设置,要么忘记了出口.

编辑:好的,现在在我看来你的委托属性是在错误的类.该属性应该在您的子视图中,并且在从超级视图创建该子视图时,您应该正确设置委托,如下所示:

mySubview.delegate = self;