070选择一个分段卡后可以改变屏幕的背景颜色

1 #import <UIKit/UIKit.h>
2 
3 @interface ViewController : UIViewController
4 @property (strong, nonatomic) NSArray *arrColorName;
5 
6 @end

 1 #import "ViewController.h"
 2 
 3 @interface ViewController ()
 4 - (void)layoutUI;
 5 - (void)segmentDidChange:(UISegmentedControl *)sender;
 6 @end
 7 
 8 @implementation ViewController
 9 
10 - (void)viewDidLoad {
11     [super viewDidLoad];
12     
13     [self layoutUI];
14 }
15 
16 - (void)didReceiveMemoryWarning {
17     [super didReceiveMemoryWarning];
18     // Dispose of any resources that can be recreated.
19 }
20 
21 - (void)layoutUI {
22     _arrColorName = @[@"blackColor", @"blueColor", @"brownColor"];
23     UIColor *color = [UIColor colorWithRed:1.000 green:0.473 blue:0.813 alpha:1.000];
24     self.view.backgroundColor = color;
25     
26     UISegmentedControl *smtBackgroundColor = [[UISegmentedControl alloc] initWithItems:_arrColorName];
27     smtBackgroundColor.frame = CGRectMake(0, 0, 240, 40);
28     smtBackgroundColor.tintColor = color;
29     [smtBackgroundColor addTarget:self
30                            action:@selector(segmentDidChange:)
31                  forControlEvents:UIControlEventValueChanged];
32     
33     //将分段卡追加到导航条的右侧
34     UIBarButtonItem *barBtnRight = [[UIBarButtonItem alloc] initWithCustomView:smtBackgroundColor];
35     self.navigationItem.rightBarButtonItem = barBtnRight;
36 }
37 
38 - (void)segmentDidChange:(UISegmentedControl *)sender {
39     NSString *colorName = _arrColorName[sender.selectedSegmentIndex];
40     SEL selColor = NSSelectorFromString(colorName);
41     UIColor *color = [UIColor performSelector:selColor];
42     self.view.backgroundColor = color;
43     sender.tintColor = color;
44 }
45 
46 @end

1 #import <UIKit/UIKit.h>
2 
3 @interface AppDelegate : UIResponder <UIApplicationDelegate>
4 @property (strong, nonatomic) UIWindow *window;
5 @property (strong, nonatomic) UINavigationController *navigationController;
6 
7 @end

 1 #import "AppDelegate.h"
 2 #import "ViewController.h"
 3 
 4 @interface AppDelegate ()
 5 @end
 6 
 7 @implementation AppDelegate
 8 
 9 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
10     _window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
11     ViewController *viewController = [[ViewController alloc] init];
12     _navigationController = [[UINavigationController alloc] initWithRootViewController:viewController];
13     _window.rootViewController = _navigationController;
14     [_window addSubview:_navigationController.view];
15     [_window makeKeyAndVisible];
16     return YES;
17 }
18 
19 - (void)applicationWillResignActive:(UIApplication *)application {
20 }
21 
22 - (void)applicationDidEnterBackground:(UIApplication *)application {
23 }
24 
25 - (void)applicationWillEnterForeground:(UIApplication *)application {
26 }
27 
28 - (void)applicationDidBecomeActive:(UIApplication *)application {
29 }
30 
31 - (void)applicationWillTerminate:(UIApplication *)application {
32 }
33 
34 @end