[英]Using UIAlertController in Xcode 8 with Objective-C
[英]Images not showing on Xcode 6 using Objective-C
當我嘗試運行該程序時,會編譯並且沒有收到任何錯誤。 一切正常,除了圖像未顯示在View Controller上之外。 無法弄清楚圖像為什么不顯示在哪里。 我感謝任何投入。 這是我的代碼:
ViewController.m
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if ([segue.identifier isEqualToString:@"ShowItemDetail"]) {
NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
ItemDetailViewController *destViewController = segue.destinationViewController;
destViewController.itemDesc = [listItems objectAtIndex:indexPath.row];
destViewController.itemName = [listTimes objectAtIndex:indexPath.row];
destViewController.pictureImageView = [listImages objectAtIndex:indexPath.row];
}
ItemDetailViewController.h
#import <UIKit/UIKit.h>
@interface ItemDetailViewController : UIViewController
@property (nonatomic, strong) IBOutlet UILabel *itemLabel;
@property (nonatomic, strong) IBOutlet UILabel *itemTitle;
@property (nonatomic, strong) NSString *itemName;
@property (nonatomic, strong) NSString *itemDesc;
@property (nonatomic, strong) IBOutlet UIImageView* pictureImageView;
@property (nonatomic, strong) UIImage *picImageView;
@end
ItemViewController.m
#import "ItemDetailViewController.h"
@interface ItemDetailViewController ()
@end
@implementation ItemDetailViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
self.itemLabel.text = self.itemName;
self.itemTitle.text = self.itemDesc;
self.pictureImageView.image = self.picImageView;
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
/*
#pragma mark - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
}
*/
@end
在viewDidLoad
, self.picImageView
為空。 請檢查一下。
然后,為了設置圖片,編寫如下函數:
-(void) setPicImageView: (UIImage*) picImage{
self.picImageView = picImage;
self.pictureImageView.image = picImage;
}
這應該可以解決您的問題。
希望這可以幫助。
嘗試此操作以准備進行測試:
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if ([segue.identifier isEqualToString:@"ShowItemDetail"]) {
NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
ItemDetailViewController *destViewController = segue.destinationViewController;
destViewController.itemDesc = [listItems objectAtIndex:indexPath.row];
destViewController.itemName = [listTimes objectAtIndex:indexPath.row];
destViewController.picImageView = [listImages objectAtIndex:indexPath.row];
}
並在您的viewDidLoad中嘗試以下操作:
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
self.itemLabel.text = self.itemName;
self.itemTitle.text = self.itemDesc;
self.pictureImageView.image = self.picImageView;
}
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