使用UIAppearance更改选定的单元格背景颜色

Question

I need to change the selected cell background colour for all the cells in my app. As I know there is a way to use UIAppearance protocol for this purposes. Is it possible to realize this by the category for UITableViewCell ?

Answer 1

Using appearance proxy you can colour all cells. Don't know if you can target specific category.

To do the colouring put following code in your AppDelegate.m file:

Put [self customCellBackground]; in - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions

and somewhere at the end:

- (void)customCellBackground {
UIView *cellBackgroundView =[[UIView alloc] init];
cellBackgroundView.backgroundColor = [UIColor blackColor];
[[UITableViewCell appearance] setSelectedBackgroundView:cellBackgroundView];}

Answer 2

As null 's answer is not for selected cell backgrounds and Armands L. 's answer did not work consistently for me (selecting cells by 'user-tap' did work, but programmatical cell selection showed strange results (like sometimes the selected background was not visible, or did not fill the cell's height properly...).

I found a custom solution that worked:

1. Subclass UITableViewCell
2. Initialize self.selectedBackgroundView in init and
3. Add custom UIColor property with UI_APPEARANCE_SELECTOR for custom selected background color

.h file:

@property (nonatomic) UIColor* selectedCellBackgroundColor UI_APPEARANCE_SELECTOR;

.m file:

in init method(s):

self.selectedBackgroundView = [[UIView alloc] init];

and last but not least the setter function for the color:

- (void) setSelectedCellBackgroundColor:(UIColor*) color {
    _selectedCellBackgroundColor = color;
    self.selectedBackgroundView.backgroundColor = color;
}

Answer 3

You can't do this direct to UITableViewCell, but you can do it for its contentView :

[[UIView appearanceWhenContainedIn:[UITableViewCell class], nil] setBackgroundColor:[UIColor redColor]];

Note that it will change all the subViews bg color.

Another option is writing a category or subclass the UITableViewCell with UI_APPEARANCE_SELECTOR mark, check this question:

iOS: Using UIAppearance to define custom UITableViewCell color