ios UIButton - 触摸更改图像
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UIButton - On touch change image
提问by Sam007
When I touch the button at that time I want to change image & when i release the touch button image is as it is.
当我当时触摸按钮时，我想更改图像，当我释放触摸按钮时，图像原样。
I want to apply below code but it's not with my expectation.
我想应用下面的代码，但这不符合我的期望。
please give me any suggestion.....
请给我任何建议......
-(IBAction)actionEnter:(id)sender{
if ([sender isSelected]) {
[sender setImage:[UIImage imageNamed:@"enter-hover.png"]
forState:UIControlStateNormal];
[sender setSelected:NO];
} else {
[sender setImage:[UIImage imageNamed:@"enter.png"]
forState:UIControlStateSelected];
[sender setSelected:YES];
}
采纳答案by taskinoor
You can use UIControlStateHighlighted for this.
您可以为此使用 UIControlStateHighlighted。
[myButton setImage:[UIImage imageNamed:@"enter-hover.png"]
forState:UIControlStateHighlighted];
You can also set this from interface builder by setting the image for highlighted state.
您还可以通过设置突出显示状态的图像从界面构建器中设置此项。
回答by visakh7
I think this should do it. Set the images after creating the button
我认为应该这样做。创建按钮后设置图像
[yourButton setImage:[UIImage imageNamed:@"enter-hover.png"]
forState:UIControlStateSelected];
[yourButton setImage:[UIImage imageNamed:@"enter.png"]
forState:UIControlStateNormal];
and do this
并这样做
- (IBAction)actionEnter:(id)sender{
UIButton *button = (UIButton *)sender;
button.selected = !button.selected;
}
回答by Jhaliya
I think, you could set the image in the beginning for normal and selected state ..
我认为，您可以在开始时将图像设置为正常和选定状态..
Try with below when you create the UIButtonobject. [Use the images as per your requirement]
创建UIButton对象时，请尝试以下操作。[根据您的要求使用图像]
[myButton setImage:[UIImage imageNamed:@"enter.png"]
forState:UIControlStateNormal];
[myButton setImage:[UIImage imageNamed:@"enter-hover.png"]
forState:UIControlStateSelected];
回答by jxmorris12
In Swift:
在斯威夫特：
button.setImage(UIImage(named: "enter.png"), forState: [.Selected, .Highlighted])
button.setImage(UIImage(named: "enter.png"), forState: [.Selected, .Highlighted])
回答by JScarry
@7KV7 got me thinking. I have favorite and ignore buttons that I want to use to mark favorite pictures and pictures that I never want to see again. I used his method to initialize the buttons and then slightly modified his method to toggle the buttons on and off.
@7KV7 让我思考。我有最喜欢和忽略的按钮，我想用它们来标记最喜欢的图片和我再也不想看到的图片。我使用他的方法来初始化按钮，然后稍微修改他的方法来打开和关闭按钮。
In this example, if you mark a picture as a favorite, you want to turn off the ignore button and vice versa. The delegate handles the database stuff.
在此示例中，如果您将图片标记为收藏，您希望关闭忽略按钮，反之亦然。委托处理数据库的东西。
self.favoriteButton = [UIButton buttonWithType:UIButtonTypeCustom];
self.ignoreButton = [UIButton buttonWithType:UIButtonTypeCustom];
[self.favoriteButton setImage:[UIImage imageNamed:@"Favorite-Selected"]
forState:UIControlStateSelected];
[self.favoriteButton setImage:[UIImage imageNamed:@"Favorite"]
forState:UIControlStateNormal];
[self.ignoreButton setImage:[UIImage imageNamed:@"Ignore-Selected"]
forState:UIControlStateSelected];
[self.ignoreButton setImage:[UIImage imageNamed:@"Ignore"]
forState:UIControlStateNormal];
If you are just toggling a button on or off, you won't need to make it a property, since the buttonPressed sender knows which button has been pressed. I need to have them be property since I need to tell the opposite button to turn its highlight off.
如果您只是打开或关闭按钮，则不需要将其设置为属性，因为 buttonPressed 发送者知道按下了哪个按钮。我需要让它们成为财产，因为我需要告诉相反的按钮关闭其突出显示。
- (void)favoriteIgnore:(UIButton *)buttonPressed {
// Toggle the tapped button
buttonPressed.selected = ( buttonPressed.selected) ? NO : YES;
id <ScoringToolbarDelegate> TB_delegate = _delegate;
// Turn off the other button and call the delegate
if ([buttonPressed.currentTitle isEqualToString:@"favorite"]) {
self.ignoreButton.selected = NO;
[TB_delegate favoriteButtonPressed];
} else {
self.favoriteButton.selected = NO;
[TB_delegate ignoreButtonPressed];
}
}
回答by Magic Bullet Dave
to change the image immediately use the backgroundImage property.
要立即更改图像，请使用 backgroundImage 属性。
