我正在构建一个iOS应用程序,其中包含2个主题(黑暗和浅色),背景会改变颜色。
我现在的问题是文字颜色的变化。如何将所有标签的文字颜色设置为lightTextColor
?
这是我改变颜色的地方:
- (void)changeColor {
NSUserDefaults *standardDefaults = [NSUserDefaults standardUserDefaults];
NSString *themeSetting = [standardDefaults stringForKey:@"themeKey"];
if ([themeSetting isEqualToString:@"lightTheme"]) {
self.view.backgroundColor = [UIColor whiteColor];
} else {
self.view.backgroundColor = [UIColor blackColor];
}
}
文本颜色变化必须以某种方式进入...
答案 0 :(得分:6)
循环遍历UIView's
中的所有self.view.subviews
并检查它是否为UILabel类型。如果是,则将视图转换为标签并设置颜色。
- (void)changeColor {
NSUserDefaults *standardDefaults = [NSUserDefaults standardUserDefaults];
NSString *themeSetting = [standardDefaults stringForKey:@"themeKey"];
if ([themeSetting isEqualToString:@"lightTheme"]) {
self.view.backgroundColor = [UIColor whiteColor];
} else {
self.view.backgroundColor = [UIColor blackColor];
//Get all UIViews in self.view.subViews
for (UIView *view in [self.view subviews]) {
//Check if the view is of UILabel class
if ([view isKindOfClass:[UILabel class]]) {
//Cast the view to a UILabel
UILabel *label = (UILabel *)view;
//Set the color to label
label.textColor = [UIColor redColor];
}
}
}
}