在定製單元格中更改UIButton

Question

我使用此代碼來更改我的UITableView中的UIButton。 問題是當我滾動表的按鈕正在改變沒有任何理由。

UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom]; 
[button setFrame:CGRectMake(232, 88, 78, 24)]; 

if([[array objectAtIndex:(indexPath.row)] isEqualToString:@"0"]) 
    [button setImage:[UIImage imageNamed:@"pic1"] forState:UIControlStateNormal]; 
else 
    [button setImage:[UIImage imageNamed:@"pic2"] forState:UIControlStateNormal]; 

[button addTarget:self action:@selector(buttonClicked:) forControlEvents:UIControlEventTouchUpInside]; 
[Cell.contentView addSubview:button]; 

這是buttonClicked:方法：

-(void)buttonClicked:(id)sender 
{ 
    CGPoint touchPoint = [sender convertPoint:CGPointZero toView:self.myTableView]; 
    NSIndexPath *indexPath = [self.myTableView indexPathForRowAtPoint:touchPoint]; 
    UIButton *button = (UIButton *)sender; 
    if([[array objectAtIndex:indexPath.row] isEqualToString:@"0"]) 
    { 
     [button setImage:[UIImage imageNamed:@"pic2"] forState:UIControlStateNormal]; 
     [array replaceObjectAtIndex:indexPath.row withObject:@"1"]; 
    } 
    else 
    { 
     [button setImage:[UIImage imageNamed:@"pic1"] forState:UIControlStateNormal]; 
     [array replaceObjectAtIndex:indexPath.row withObject:@"0"]; 
    } 
} 

Answer 1

那是因爲你的被重用。試試這個：

UIButton *button; = (UIButton *) [cell viewWithTag:34]; 
if (!button) { 
button = [UIButton buttonWithType:UIButtonTypeCustom]; 
[button setFrame:CGRectMake(232, 88, 78, 24)]; 
button.tag = 34; 

if([[array objectAtIndex:(indexPath.row)] isEqualToString:@"0"]) 
    [button setImage:[UIImage imageNamed:@"pic1"] forState:UIControlStateNormal]; 
else 
    [button setImage:[UIImage imageNamed:@"pic2"] forState:UIControlStateNormal]; 

[button addTarget:self action:@selector(buttonClicked:) forControlEvents:UIControlEventTouchUpInside]; 
[Cell.contentView addSubview:button]; 
}