使用下面的代码来改变我在UIActionSheet
添加项目的文本颜色我已经:
- (void)willPresentActionSheet:(UIActionSheet *)actionSheet {
for (UIView *subview in actionSheet.subviews) {
if ([subview isKindOfClass:[UIButton class]]) {
UIButton *button = (UIButton *)subview;
[button setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
}
}
}
它工作在iOS7
罚款,但在iOS8
上面的代码不会改变项目的文本颜色。
现在的问题是如何改变,我使用UIActionSheet
在iOS8
添加项目的文本颜色?
附加信息:
我加了断点看到从上面的代码下面几行是否得到执行与否:
UIButton *button = (UIButton *)subview;
[button setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
这些线路将无法得到执行。所以,if([subview isKindOfClass:[UIButton class]])
总是false
为actionSheet.subviews
的所有项目。因此,我认为是UIActionSheet
的视图层次结构已经改变。
这里有一个简单的方法,如果你仍然想以改用UIActionSheet
UIAlertController
的支持老版本的IOS。
UIActionSheet
实际使用UIAlertController
在iOS 8的,它有一个私人财产_alertController
。
SEL selector = NSSelectorFromString(@"_alertController");
if ([actionSheet respondsToSelector:selector])
{
UIAlertController *alertController = [actionSheet valueForKey:@"_alertController"];
if ([alertController isKindOfClass:[UIAlertController class]])
{
alertController.view.tintColor = [UIColor blueColor];
}
}
else
{
// use other methods for iOS 7 or older.
}
对于斯威夫特下面的代码应该工作
let alertAction = UIAlertAction(title: "XXX", style: .default) { (action) in
}
alertAction.setValue(UIColor.red, forKey: "titleTextColor")
要改变你需要使用UIAlertController
并设置主tintColor
的view
按钮标题颜色。
设置按钮标题颜色为黑色的实施例:
UIAlertController *actionSheetController = [UIAlertController alertControllerWithTitle:@"How would you like to proceed?" message:@"" preferredStyle:UIAlertControllerStyleActionSheet];
UIAlertAction *finish = [UIAlertAction actionWithTitle:@"Finish" style:UIAlertActionStyleDefault handler:^(UIAlertAction * action)
{
[self performSelector:@selector(finish:) withObject:nil];
}];
UIAlertAction *playAgain = [UIAlertAction actionWithTitle:@"Play Again" style:UIAlertActionStyleDefault handler:^(UIAlertAction * action)
{
[self performSelector:@selector(playAgain:) withObject:nil];
}];
UIAlertAction *cancel = [UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleCancel handler:^(UIAlertAction *action)
{
[actionSheetController dismissViewControllerAnimated:YES completion:nil];
}];
[actionSheetController addAction:finish];
[actionSheetController addAction:playAgain];
[actionSheetController addAction:cancel];
//******** THIS IS THE IMPORTANT PART!!! ***********
actionSheetController.view.tintColor = [UIColor blackColor];
[self presentViewController:actionSheetController animated:YES completion:nil];
好吧,我遇到了同样的问题,但我想我已经找到了解决办法:
用适当的方式应该是这样的,我想它在iOS7:
[[UIButton appearanceWhenContainedIn:[UIActionSheet class], nil] setTitleColor:[UIColor blueColor] forState:UIControlStateNormal];
但它不会在iOS8上由于事实ActionSheets“按钮”现在是基于UICollectionView工作。因此,一些周围挖后,我得到这个,而不是工作:
[[UICollectionView appearanceWhenContainedIn:[UIAlertController class], nil] setTintColor:[UIColor blueColor]];
我使用它。
[[UIView appearanceWhenContainedIn:[UIAlertController class], nil] setTintColor:[UIColor blueColor]];
添加一行(AppDelegate中)和所有UIAlertController作品。
我有同样的任务,我做了这个技巧的今天,脏的,但它的工作原理
class CustomAlertViewController: UIAlertController {
internal var cancelText: String?
private var font: UIFont? = UIFont(name: "MuseoSansCyrl-500", size: 12)
override func viewDidLoad() {
super.viewDidLoad()
self.view.tintColor = UIColor.blackColor()
}
override func viewWillLayoutSubviews() {
super.viewWillLayoutSubviews()
self.findLabel(self.view) //if you need ios 9 only, this can be made in viewWillAppear
}
func findLabel(scanView: UIView!) {
if (scanView.subviews.count > 0) {
for subview in scanView.subviews {
if let label: UILabel = subview as? UILabel {
if (self.cancelText != nil && label.text == self.cancelText!) {
dispatch_async(dispatch_get_main_queue(),{
label.textColor = UIColor.redColor() //for ios 8.x
label.tintColor = UIColor.redColor() //for ios 9.x
})
}
if (self.font != nil) {
label.font = self.font
}
}
self.findLabel(subview)
}
}
}
}
更改tintColor
的window
为我工作。
在- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions method
这样写:
[self.window setTintColor:[UIColor redColor]];
这一切都改变UIActionSheet
对象的字体颜色。
对于iOS 7的向后兼容性,并收集了正确的默认着色颜色(苹果很可能在未来的版本改变),我用这个。由于有关default tint及以上Lucas's answer答案。
const Class alertControllerClass = NSClassFromString(@"UIAlertController");
if(alertControllerClass)
{
UIColor *defaultTintColour = UIView.new.tintColor;
[[UIView appearanceWhenContainedIn: alertControllerClass, nil] setTintColor: defaultTintColour];
}
注意虽然 - 你需要确保你使用这个您开始设置全局色调,否则会UIView.new.tintColor
只是给你设置了当前色调之前。
斯威夫特4
let alert = UIAlertController(title: "title", message: "message", preferredStyle: .alert)
alert.view.tintColor = UIColor.black
self.present(alert, animated: true, completion: nil)
对于斯威夫特,你可以这样做
let alertAction = UIAlertAction(title: "XXX", style: .default) { (action) in
}
alertAction.setValue(UIColor.red, forKey: "titleTextColor")