ios - UIButton 不显示我的数组的 UIbuttons 背景图像

Question

.因此，它将通过使用数组和 random() 触摸 UIButton 与 IBAction 来显示按钮上随机 1-6 个骰子图像的图像，以从图像数组中选择以在图像背景上显示

#import "ViewController.h"

@interface ViewController ()
@end

@implementation ViewController

- (IBAction)diceButton:(UIButton *)sender {

    _diceArray=[NSMutableArray arrayWithObjects:
                           [UIImage imageNamed:@"Dice_1.png"],
                           [UIImage imageNamed:@"Dice_2.png"],
                           [UIImage imageNamed:@"Dice_3.png"],
                           [UIImage imageNamed:@"Dice_4.png"],
                           [UIImage imageNamed:@"Dice_5.png"],
                           [UIImage imageNamed:@"Dice_6.png"],nil];

    int index = random() % 5 ;

    for (int i = 0; i < [_diceArray count]; i++) {
        [_diceButton setBackgroundImage:[UIImage imageNamed:[_diceArray objectAtIndex:index]] forState:UIControlStateNormal];

    }
}
@end

Answer 1

像这样使用

[_diceButton setBackgroundImage:_diceArray[index] forState:UIControlStateNormal];  

由于您的 _diceArray 包含 UIImage 而不是图像名称