创建Button
//创建一个button
UIButton * button = [UIButton buttonWithType:UIButtonTypeCustom];
//枚举类型
/*
typedef NS_ENUM(NSInteger, UIButtonType) {
UIButtonTypeCustom = 0, // no button type
UIButtonTypeSystem NS_ENUM_AVAILABLE_IOS(7_0), // standard system button
UIButtonTypeDetailDisclosure,
UIButtonTypeInfoLight,
UIButtonTypeInfoDark,
UIButtonTypeContactAdd,
UIButtonTypeRoundedRect = UIButtonTypeSystem, // Deprecated, use UIButtonTypeSystem instead
};
*/
设置button位置
//设置button位置
button.frame = CGRectMake(100, 100, 120, 160);
设置button的title和状态
[button setTitle:@"点击" forState:UIControlStateNormal];
//正常状态下的Title为“点击”
设置button背景色
//设置button的title
button.backgroundColor = [UIColor redColor];
/*
typedef NS_OPTIONS(NSUInteger, UIControlState) {
UIControlStateNormal = 0, 平时状态
UIControlStateHighlighted = 1 << 0, 高亮状态 // used when UIControl isHighlighted is set
UIControlStateDisabled = 1 << 1, 不允许点击状态
UIControlStateSelected = 1 << 2, // flag usable by app (see below)
UIControlStateFocused NS_ENUM_AVAILABLE_IOS(9_0) = 1 << 3, // Applicable only when the screen supports focus
UIControlStateApplication = 0x00FF0000, // additional flags available for application use
UIControlStateReserved = 0xFF000000 // flags reserved for internal framework use
};
*/
以上为Button的各种状态
设置Title颜色
// 设置title颜色 平时状态
[button setTitleColor:[UIColor grayColor] forState:UIControlStateNormal];
设置高亮下
//设置button高亮标题
[button setTitle:@"点了一下" forState:UIControlStateHighlighted];
//设置button高亮状态文字颜色
[button setTitleColor:[UIColor redColor] forState:UIControlStateHighlighted];
//设置button高亮状态下的背景图片
[button setBackgroundImage:[UIImage imageNamed:@"2.jpg"] forState:UIControlStateHighlighted];
设置禁止点击
//设置button禁止点击;
button.userInteractionEnabled = YES;
设置点击事件
[button addTarget:self action:@selector(onClick:) forControlEvents:UIControlEventTouchUpInside];
//枚举各种点击方式
/*
typedef NS_OPTIONS(NSUInteger, UIControlEvents) {
UIControlEventTouchDown 点下去 = 1 << 0, // on all touch downs
UIControlEventTouchDownRepeat 快速点击 = 1 << 1, // on multiple touchdowns (tap count > 1)
UIControlEventTouchDragInside 点击滑动 button内 = 1 << 2,
UIControlEventTouchDragOutside 点击滑动 button外 = 1 << 3,
UIControlEventTouchDragEnter = 1 << 4,
UIControlEventTouchDragExit = 1 << 5,
UIControlEventTouchUpInside = 1 << 6,
UIControlEventTouchUpOutside = 1 << 7,
UIControlEventTouchCancel = 1 << 8,
UIControlEventValueChanged = 1 << 12, // sliders, etc.
UIControlEventPrimaryActionTriggered NS_ENUM_AVAILABLE_IOS(9_0) = 1 << 13, // semantic action: for buttons, etc.
UIControlEventEditingDidBegin = 1 << 16, // UITextField
UIControlEventEditingChanged = 1 << 17,
UIControlEventEditingDidEnd = 1 << 18,
UIControlEventEditingDidEndOnExit = 1 << 19, // 'return key' ending editing
UIControlEventAllTouchEvents = 0x00000FFF, // for touch events
UIControlEventAllEditingEvents = 0x000F0000, // for UITextField
UIControlEventApplicationReserved = 0x0F000000, // range available for application use
UIControlEventSystemReserved = 0xF0000000, // range reserved for internal framework use
UIControlEventAllEvents = 0xFFFFFFFF
};
*/
Label碰撞反弹事件代码
1 #import "ViewController.h"
2
3 @interface ViewController (){
4 //x坐标
5 float x;
6 //y坐标
7 float y;
8 //x位移量
9 float vX;
10 //y位移量
11 float vY;
12 //点击计数器
13 int times;
14
15 //计时器
16 NSTimer * timer;
17 //标签
18 UILabel * label;
19 // UIImageView * imgView;
20 }
21
22 @end
23
24 @implementation ViewController
25
26 - (void)viewDidLoad {
27 [super viewDidLoad];
28 //创建按钮 实现点击方法
29 UIButton * button = [UIButton buttonWithType:UIButtonTypeCustom];
30 button.frame = CGRectMake((self.view.frame.size.width-150)/2, (self.view.frame.size.height-50)/2, 150, 50);
31 [button setTitle:@"点击开始/暂停" forState:UIControlStateNormal];
32 [button setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
33 [button setTitleColor:[UIColor grayColor] forState:UIControlStateHighlighted];
34 button.backgroundColor = [UIColor groupTableViewBackgroundColor];
35
36 // imgView = [[UIImageView alloc]initWithImage:[UIImage imageNamed:@"1.jpg"]];
37 // imgView.frame = CGRectMake(0, 0, 100, 150);
38 // [self.view addSubview:imgView];
39
40 //设置x,y。times归0 设置位移量
41 x = 0;
42 y = 0;
43 times = 0;
44 vX = 0.01;
45 vY = 0.01;
46
47 //创建标签
48 label = [[UILabel alloc]initWithFrame:CGRectMake(x, y, 200, 35)];
49 label.text = @"这是一个很神奇的标签";
50 label.adjustsFontSizeToFitWidth = YES;
51 label.textAlignment = NSTextAlignmentCenter;
52
53
54
55 [button addTarget:self action:@selector(onClick) forControlEvents:UIControlEventTouchUpInside];
56 [self.view addSubview:label];
57 [self.view addSubview:button];
58 // Do any additional setup after loading the view, typically from a nib.
59 }
60
61 - (void)onClick{
62 //点击后 点击计数器加1
63 times++;
64
65 //计数器为奇数 开始计时器 偶数暂停
66 if (times%2==1) {
67 [self startTimer];
68 }else if (times%2 == 0) {
69
70 [self stopTimer];
71 }
72 }
73 - (void)startTimer{
74 //设置计时器 循环调用move方法
75 timer = [NSTimer scheduledTimerWithTimeInterval:0.0001 target:self selector:@selector(move) userInfo:nil repeats:YES];
76 }
77 - (void)stopTimer{
78 [timer setFireDate:[NSDate distantFuture]];
79 }
80
81 -(void)move{
82 //若x超边界 则vX取反 x,y改变位置
83 if (x>self.view.frame.size.width-200||x<0) {
84 vX = 0-vX;
85 x = x+vX;
86 y = y+vY;
87 }else if (y >self.view.frame.size.height-35||y<0) {
88 //若y超边界 则vY取反 x,y改变位置
89 vY = 0-vY;
90 x = x+vX;
91 y = y+vY;
92 }else{
93 //x,y改变位置
94 x = x+vX;
95 y = y+vY;
96 }
97
98 //重置label位置
99 [label setFrame:CGRectMake(x, y, 200, 35)];
100
101 }
102
103 - (void)didReceiveMemoryWarning {
104 [super didReceiveMemoryWarning];
105 // Dispose of any resources that can be recreated.
106 }
107
108 @end