057调整屏幕中按钮的边间距

效果如下：

ViewController.h

1 #import <UIKit/UIKit.h>

2 

3 @interface ViewController : UIViewController

4 @property (strong, nonatomic) UIButton *btnTitleEdgeInsets;

5 

6 @end

ViewController.m

 1 #import "ViewController.h"

 2 

 3 @interface ViewController ()

 4 - (void)disableStateSwitch:(UISwitch *)sender;

 5 - (void)buttonDidPush;

 6 @end

 7 

 8 @implementation ViewController

 9 

10 - (void)viewDidLoad {

11     [super viewDidLoad];

12     self.view.backgroundColor = [UIColor whiteColor];

13     self.navigationItem.title = @"调整屏幕中按钮的边间距";

14     UISwitch *swtDisableState = [[UISwitch alloc] init];

15     swtDisableState.on = YES;

16     [swtDisableState addTarget:self action:@selector(disableStateSwitch:) forControlEvents:UIControlEventValueChanged];

17     UIBarButtonItem *barBtnDisableState = [[UIBarButtonItem alloc] initWithCustomView:swtDisableState];

18     [self setToolbarItems:@[barBtnDisableState] animated:YES];

19     

20     _btnTitleEdgeInsets = [UIButton buttonWithType:UIButtonTypeCustom];

21     _btnTitleEdgeInsets.frame = CGRectMake(0, 0, 320, 60);

22     _btnTitleEdgeInsets.center = self.view.center;

23     _btnTitleEdgeInsets.backgroundColor = [UIColor whiteColor];

24     _btnTitleEdgeInsets.layer.masksToBounds = YES;

25     _btnTitleEdgeInsets.layer.cornerRadius = 8.0;

26     //设置按钮标题字体及阴影颜色、行数

27     _btnTitleEdgeInsets.titleLabel.font = [UIFont boldSystemFontOfSize:16];

28     _btnTitleEdgeInsets.titleLabel.shadowOffset = CGSizeMake(2.0, 2.0);

29     _btnTitleEdgeInsets.titleLabel.numberOfLines = 2;

30     //设置普通状态下的显示特征

31     [_btnTitleEdgeInsets setTitle:@"点我进行状态图片切换

32 并且进行边间距调整" forState:UIControlStateNormal];

33     [_btnTitleEdgeInsets setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];

34     [_btnTitleEdgeInsets setTitleShadowColor:[UIColor grayColor] forState:UIControlStateNormal];

35     

36     //添加用于按钮各状态下的图片

37     [_btnTitleEdgeInsets setImage:[UIImage imageNamed:@"DogNormal"] forState:UIControlStateNormal];

38     [_btnTitleEdgeInsets setImage:[UIImage imageNamed:@"DogHighlighted"] forState:UIControlStateHighlighted];

39     [_btnTitleEdgeInsets setImage:[UIImage imageNamed:@"DogDisabled"] forState:UIControlStateDisabled];

40     //设置普通状态下的背景图片

41     UIImage *imgStretchable = [[UIImage imageNamed:@"Frame"] stretchableImageWithLeftCapWidth:20 topCapHeight:20];

42     [_btnTitleEdgeInsets setBackgroundImage:imgStretchable forState:UIControlStateNormal];

43     

44     //设置按钮的内部边间距

45     UIEdgeInsets edgeInsets;

46     edgeInsets.left = edgeInsets.right = edgeInsets.top = edgeInsets.bottom = 0;

47     _btnTitleEdgeInsets.titleEdgeInsets = edgeInsets;

48     [_btnTitleEdgeInsets addTarget:self action:@selector(buttonDidPush) forControlEvents:UIControlEventTouchUpInside];

49     

50     [self.view addSubview:_btnTitleEdgeInsets];

51 }

52 

53 - (void)didReceiveMemoryWarning {

54     [super didReceiveMemoryWarning];

55     // Dispose of any resources that can be recreated.

56 }

57 

58 - (void)viewWillAppear:(BOOL)animated {

59     [super viewWillAppear:animated];

60     [self.navigationController setNavigationBarHidden:NO animated:animated];

61     [self.navigationController setToolbarHidden:NO animated:animated];

62 }

63 

64 - (void)disableStateSwitch:(UISwitch *)sender {

65     _btnTitleEdgeInsets.enabled = sender.on;

66 }

67 

68 - (void)buttonDidPush {

69     UIEdgeInsets edgeInsets;

70     edgeInsets.left = -80.0;

71     edgeInsets.right = edgeInsets.top = edgeInsets.bottom = 0;

72     if (_btnTitleEdgeInsets.contentEdgeInsets.left == edgeInsets.left) {

73         edgeInsets.left = 60.0;

74     }

75     _btnTitleEdgeInsets.contentEdgeInsets = edgeInsets;

76     

77     if (_btnTitleEdgeInsets.titleEdgeInsets.left == 0) {

78         edgeInsets.left = 30.0;

79         _btnTitleEdgeInsets.titleEdgeInsets = edgeInsets;

80     }

81 }

82 

83 @end

AppDelegate.h

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

AppDelegate.m

 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