ios - 在performSelectorInBackground上为EXC_BAD_ACCESS

我想在后台调用此方法，

-(void)downloadImage_3:(NSString* )Path AtIndex:(int)i

我以这种方式打电话，但它崩溃并显示EXC_BAD_ACCESS

[self performSelectorInBackground:@selector(downloadImage_3:AtIndex:) withObject:[NSArray arrayWithObjects:@"http://www.google.com",i, nil]];

如何在后台调用downloadImage_3:方法？

我在哪里做错了？

最佳答案

尝试这个

[self performSelectorInBackground:@selector(downloadImage_3:AtIndex:) withObject:[NSArray arrayWithObjects:@"http://www.google.com",i, nil]  afterDelay:15.0];

或者试试这个

NSString* number    =   [NSString stringWithFormat:@"%d",i];
NSArray* arrayValues    =   [[NSArray alloc] initWithObjects:[[msg_array objectAtIndex:i] valueForKey:@"Merchant_SmallImage"],number, nil];
NSArray* arrayKeys      =   [[NSArray alloc] initWithObjects:@"Path",@"Index",nil];
NSDictionary* dic   =   [[NSDictionary alloc] initWithObjects:arrayValues forKeys:arrayKeys];
[self performSelectorInBackground:@selector(downloadImage_3:) withObject:dic];

定义downloadImage_3函数，如下所示:

-(void)downloadImage_3:(NSDictionary *)dic
{
   NSString *path = [dic valueForKey:@"Path"];
int i     = [[dic valueForKey:@"Index"] intValue];
  //Your code
}

关于ios - 在performSelectorInBackground上为EXC_BAD_ACCESS，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/19853892/