如何更改imageView上的圖像按鈕單擊

Question

我想更改按鈕單擊圖像視圖中的圖像，但它不會更改。我使用的JPG圖像在圖像查看加載

- (IBAction) changeImage:(id)sender 
{ 
    UIButton *tappedButton = (UIButton*) sender; 
    NSInteger selectedIndex = [tappedButton tag]; 

    if (selectedIndex==0) 
    { 
     UIImage *modelimage = [UIImage imageNamed:@"compositone.jpg"]; 
     modelImagewView.image=modelimage; 
    } 
    else 
    { 
     UIImage *modelimage = [UIImage imageNamed:@"composittwo.jpg"]; 
     modelImagewView.image=modelimage; 
    } 
} 

Answer 1

試試這個格式 - modelImagewView.image = [UIImage imageNamed:@"composittwo.jpg"];

此外，還要確保你已經設定了正確tag號碼，以便selectedIndex並不總是0，同時檢查是否您已將此IBAction鏈接到相應的按鈕。

Answer 2

試試這個代碼

- (IBAction) changeImage:(id)sender 
{ 
    UIButton *tappedButton = (UIButton*) sender; 

    if (tappedButton.tag==0) 
    { 
     modelImageView.image=[UIImage imageNamed:@"compositone.jpg"]; 
    } 
    else 
    { 
     modelImageView.image=[UIImage imageNamed:@"composittwo.jpg"]; 
    } 
}