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