objective-c - 下标需要接口 NSMutableArray 的大小，这在非易碎 ABI 中不是常量

Question

下面是我收到错误的片段：

    -(IBAction)rateButtonClick:(id)sender{

    NSMutableArray *starImage = [[NSMutableArray alloc]initWithObjects:starImage1, starImage2, starImage3, starImage4, starImage5, nil];

    NSArray *halfRateButton = [[NSArray alloc]initWithObjects:halfRateButton1, halfRateButton2, halfRateButton3, halfRateButton4, halfRateButton5, nil];

    int buttonClicked = (((UIButton *)sender).tag);
    int i;

    for (i = 0; i < buttonClicked; i++) {
        **starImage[buttonClicked].image = [UIImage imageNamed:@"rate.png"];** 
    }

    if (lastButtonClicked != buttonClicked) {
        **starImage[buttonClicked].image = [UIImage imageNamed:@"star-half-full.png"];**
    }else
        **starImage[buttonClicked].image = [UIImage imageNamed:@"rate.png"];**
        lastButtonClicked = buttonClicked;

    for (i = 0; i <= buttonClicked; i++) {
        **halfRateButton[i].hidden = YES;**
    }
}

错误出现在标记的行中。将它们更改为

    **[starImage objectAtIndex:i].image = [UIImage imageNamed:@"rate.png"];** 

行不通。我收到一个错误：

在类型 (id) 的对象上找不到图像属性。

在这里， satrImage1 到 starImage5 是UIImageViews. halfRateButton1 到 halfRateButton5 是按钮。

Answer 1

我不知道你到底想要什么，但我认为下面的答案可以帮助你摆脱错误。试试这个

[[starImage objectAtIndex:i] setImage:[UIImage imageNamed:@"rate.png"]];

或者

UIImageView *temp = [starImage objectAtIndex:i];
tmp.image = [UIImage imageNamed:@"rate.png"];