Question

按钮是动态创建的，图像是通过解析的URL给出的，所以我在viewDidLoad中创建它们并仅在viewDidLoad中释放它们。所以，当我点击按钮时，我想点击不同的按钮执行不同的任务。但我无法做到。我试图将标签设置为他们，但再次没有用，因为它给了我EXC_BD_ACCESS ....任何帮助将不胜感激... :) 代码： -

@class AppDelegate_iPhone,Litofinter,ParsingViewController;

@interface FirstViewController : UIViewController<UIGestureRecognizerDelegate>{

    NSMutableArray *array;
    NSString *logoString;
    AppDelegate_iPhone *appDelegate;

    ParsingViewController *obj;

    UIScrollView *scrollView;

    NSMutableArray *idArray;
    NSMutableArray * currentPdfUrl;



}
@property (nonatomic,retain)UIScrollView *scrollView;

//-(void)onTapImage:(UITapGestureRecognizer *)recognizer;
-(void)onTapButton:(id)sender;

@end



#import "FirstViewController.h"
#import "AppDelegate_iPhone.h"
#import "Litofinter.h"
#import "ParsingViewController.h"
#import "MyGesture.h"

@implementation FirstViewController

@synthesize scrollView;

-(id)init{
    if(self == [super init]){
        obj = [[ParsingViewController alloc] init];
        array = [[NSArray alloc] initWithArray: obj.LogoMutableArray];
    }
    return self; 
}
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
    [super viewDidLoad];

    int x=20,y=10;
    int a=50,b=105;


    appDelegate = (AppDelegate_iPhone *)[[UIApplication sharedApplication] delegate];

    scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0,500, 460)];   
    scrollView.contentSize = CGSizeMake(320,800);
    scrollView.showsVerticalScrollIndicator = YES;

    for (Litofinter *lito in appDelegate.logoArray) {

        NSString * urlString = [lito.cLogo stringByAddingPercentEscapesUsingEncoding:NSASCIIStringEncoding];
        NSURL * imageURL = [NSURL URLWithString:urlString];

        NSData * imageData = [NSData dataWithContentsOfURL:imageURL];
        UIImage * image = [UIImage imageWithData:imageData];
/*              
        UIImageView *imgView = [[UIImageView alloc] initWithImage:image];
        [imgView setFrame:CGRectMake(x, y, 140, 90)];
        imgView.userInteractionEnabled = YES;
        imgView.multipleTouchEnabled = YES;
        imgView.backgroundColor = [UIColor blueColor];
    //  imgView.tag = lito.cId;
    //  NSLog(@"Tag Id = %@",imgView.tag);
        NSLog(@"Tag Id = %@",lito.cId);


        UITapGestureRecognizer *tgr = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(onTapImage:)];
        tgr.delegate = self;
        [imgView addGestureRecognizer:tgr];

        [scrollView addSubview:imgView];

        tgr.view.tag =(int)[NSString stringWithFormat:@"%@",lito.cId];
        NSLog(@"Tag Id = %@",tgr.view.tag);
    //  NSLog(@"Tag Id = %@",lito.cId);

*/      


        UIButton *imageButton = [UIButton buttonWithType:UIButtonTypeCustom];
        [imageButton setFrame:CGRectMake(x, y, 140, 90)];
        [imageButton setImage:image forState:UIControlStateNormal];
        [imageButton addTarget:self action:@selector(onTapButton:) forControlEvents:UIControlEventTouchUpInside];
        [imageButton setTag:lito.cId];
        [scrollView addSubview:imageButton];


        UILabel *cName = [[UILabel alloc]initWithFrame:CGRectMake(a, b, 130, 20)];
        cName.text = lito.cName;
        [scrollView addSubview:cName];

        //Do the rest of your operations here, don't forget to release the UIImageView
        x = x + 150;
        a = a + 140;

        if(x >300)
        {
            y = y +140;
            x = 20;
            b = b +150;
            a = 50;
        }

        //[tgr release];
    //  [imgView release];

    }
    [self.view addSubview:scrollView];


}

-(void)onTapButton:(id)sender
{
    NSLog(@"Tag Id = %@",self.view.tag);

    UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"Message from mAc" message:@"Tag Id" delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:@"Ok",nil];
    [alert show];

}

Answer 1

您可以在设置目标

时根据按钮更改选择器

[imageButton addTarget:self action:@selector(onTapButton:) forControlEvents:UIControlEventTouchUpInside];

如果你想用标签做，它也可以工作，你的不良访问来自

NSLog(@"Tag Id = %@",self.view.tag);

假设该标签是NSObject（响应描述选择器），实际上它是一个数值。将其更改为：

NSLog(@"Tag Id = %i",self.view.tag);

另外，使用

时要小心

NSData * imageData = [NSData dataWithContentsOfURL:imageURL];

因为这是一个同步API，所以如果它是本地文件就可以了（尽管使用[UIImage imageNamed：]比较缓存图像数据更经济），如果它是网络文件（因为它阻塞线程直到请求结束，这可能需要很长时间）。

我想在点击动态创建的不同按钮上执行不同的操作

1 个答案: