目前我有自定义的 UITablViewCell（BIDSelectBusinessCustomCell），它们显示在 tableView（myTableView）中。自定义单元格由 UIImageView 和标签组成。当视图加载时，标签会填充我模型中的字符串。UIImageViews 是空白的。我希望用户能够“点击”UIImageView，从他们手机上存储的图片中选择一张图片，并将该图片保存到 UIImageView。
从下面的代码中，我可以获得“点击”手势，然后选择器控制器弹出并且用户选择图像。代码的方式现在是为所有 UIImageViews 设置的一个被选中的图像。这是可以理解的。但我希望将其设置为特定的 UIImageView 并且不知道如何设置。
代码：
#import <UIKit/UIKit.h>
@interface BIDBusinessSelectViewController : UIViewController <UITableViewDataSource, UITableViewDelegate, UIGestureRecognizerDelegate, UIImagePickerControllerDelegate, UINavigationControllerDelegate>
@property (weak, nonatomic) IBOutlet UITableView *myTableView;
@property (strong, nonatomic) NSArray *linkedBusinessParseArray;
//Stores the array of models
@property (strong, nonatomic) NSMutableArray *linkedBusinessParseModelArray;
@property NSUInteger relevantIndex;
@property (strong, nonatomic) UIImage *tempImageHolder;
@end
#import "BIDBusinessSelectViewController.h"
#import <Parse/Parse.h>
#import "BIDBusinessModel.h"
#import "BIDSelectBusinessCustomCell.h"
@interface BIDBusinessSelectViewController () <ImageSelect>
{
BIDSelectBusinessCustomCell *aCell;//define a cell of ur custom cell to hold selected cell
UIImage *choosenImage; //image to set the selected image
}
@end
@implementation BIDBusinessSelectViewController
- (void)viewDidLoad
{
[super viewDidLoad];
self.myTableView.delegate = self;
self.myTableView.dataSource = self;
self.linkedBusinessParseModelArray = [[NSMutableArray alloc]init];
//create query
PFQuery *linkedBusinessParseQuery = [PFQuery queryWithClassName:@"linkedBusinessParseClass"];
//follow relationship
[linkedBusinessParseQuery whereKey:@"currentBusinessUserParse" equalTo:[PFUser currentUser]];
[linkedBusinessParseQuery whereKey:@"linkRequestSentParse" equalTo:@"Approved"];
[linkedBusinessParseQuery findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
self.linkedBusinessParseArray = objects; //store them in my model array
//loop through model array from Parse
for (NSDictionary *dict in self.linkedBusinessParseArray) {
NSString *descPlaceNameParse = [dict objectForKey:@"placeDescriptionParse"];
NSLog(@"descPlacesNameParse: %@",descPlaceNameParse);
PFObject *tempObj = (PFObject *) dict;
NSString *tempObjString = tempObj.objectId;
NSLog(@"tempObjString (inside dict): %@", tempObjString);
//storing values from Parse into my model
BIDBusinessModel *userModel = [[BIDBusinessModel alloc]init];
userModel.descriptionModelParse = descPlaceNameParse;
userModel.objectIdModelParse = tempObjString;
[self.linkedBusinessParseModelArray addObject:userModel];
NSLog(@"self.linkedBusinessParseModelArray: %lu", (unsigned long)[self.linkedBusinessParseModelArray count]);
//Reload tableview. Has to go here in block otherwise it does not occur
[self.myTableView reloadData];
}
}];
if (![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
UIAlertView *myAlertView = [[UIAlertView alloc] initWithTitle:@"Error"
message:@"Device has no camera"
delegate:nil
cancelButtonTitle:@"OK"
otherButtonTitles: nil];
[myAlertView show];
}
choosenImage = [UIImage imageNamed:@"pin.png"]; //hear u need to set the image for cell assuming that u are setting initially same image for all the cell
}
#pragma mark -
#pragma mark Table Delegate Methods
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return self.linkedBusinessParseModelArray.count; //returns count of model NSMutableArray
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
NSLog(@"Start cellforRowStIndex");
static NSString *CellIdentifier = @"Cell";
BIDSelectBusinessCustomCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (!cell) {
cell = [[BIDSelectBusinessCustomCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
BIDBusinessModel *bizModel;
bizModel = self.linkedBusinessParseModelArray[indexPath.row];
bizModel.image = choosenImage;
//cell.descLabel.text = [NSString stringWithFormat:@"bid= %d",indexPath.row];//set text from the model//Omitted for my desc
cell.descLabel.text = bizModel.descriptionModelParse;
cell.logoImage.image =bizModel.image; //setting the image initially the image when u set in "viewDidLoad" method from second time onwords it will set from the picker delegate method
//insted of settig the gesture hear set it on the custom cell
cell.ImageSelectDelegate = self; //setting the delegate
cell.selectionStyle = UITableViewCellSelectionStyleNone;
return cell;
}
// hear implementation of delegate method
- (void)selectSetImageForSelectedLogImage:(UIImageView *)logoImgView;
{
//open up the image picker
UIImagePickerController *picker = [[UIImagePickerController alloc]init];
picker.delegate = self;
picker.allowsEditing = YES;
picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
aCell = (BIDSelectBusinessCustomCell *)logoImgView.superview; //her getting the cell
[self presentViewController:picker animated:YES completion:NULL];
}
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
UIImage *aChosenImage = info[UIImagePickerControllerEditedImage];
//UIImage holder to transfer to cellForRowAtIndexPath
choosenImage = aChosenImage;
NSIndexPath *indexPath = [self.myTableView indexPathForCell:aCell];
[self.myTableView reloadRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade]; //hear reloading the selected cell only not entire tableview
//get the model and set the choosen image
BIDBusinessModel *bizModel;
bizModel = self.linkedBusinessParseModelArray[indexPath.row];
bizModel.image = aChosenImage;
[picker dismissViewControllerAnimated:YES completion:NULL];
}
-(void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
{
[picker dismissViewControllerAnimated:YES completion:NULL];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
#import <UIKit/UIKit.h>
@protocol ImageSelect<NSObject> //for this u need use custom delegate so i did like this
- (void)selectSetImageForSelectedLogImage:(UIImageView *)logoImgView;
@end
@interface BIDSelectBusinessCustomCell : UITableViewCell
@property (strong, nonatomic) IBOutlet UILabel *descLabel;
@property (strong, nonatomic) IBOutlet UIImageView *logoImage;
@property (nonatomic, assign) id<ImageSelect>ImageSelectDelegate; // deleagte
@end
#import "BIDSelectBusinessCustomCell.h"
@implementation BIDSelectBusinessCustomCell
- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
if (self) {
self.logoImage = [[UIImageView alloc]init];
self.descLabel = [[UILabel alloc]init];
//set up gesture hear in the custom cell insted in the controller class
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapLogoImage:)];
[tap setNumberOfTouchesRequired:1];
[tap setNumberOfTapsRequired:1];
[tap setDelegate:self];
self.logoImage.userInteractionEnabled = YES;
[self.logoImage addGestureRecognizer:tap];
//[self addSubview:logoImage];
//[self addSubview:descLabel];
}
return self;}
- (void)setSelected:(BOOL)selected animated:(BOOL)animated
{
[super setSelected:selected animated:animated];
// Configure the view for the selected state
}
- (void)tapLogoImage:(UITapGestureRecognizer *)guesture
{
if([self.ImageSelectDelegate respondsToSelector:@selector(selectSetImageForSelectedLogImage:)])
{
[self.ImageSelectDelegate selectSetImageForSelectedLogImage:self.logoImage];//call the delegate method from the selected cell
}
}
@end