- iOS 教程
- iOS 简介
- iOS环境搭建
- Objective-C 简介
- 创建第一款iPhone应用程序
- iOS操作(action)和输出口(Outlet)
- iOS - 委托(Delegates)
- 什么是UI元素?
- IOS加速度传感器(accelerometer)
- IOS通用应用程序
- IOS相机管理
- IOS定位操作
- IOS SQLite数据库
- IOS发送电子邮件
- IOS音频和视频(Audio & Video)
- IOS文件处理
- IOS地图开发
- IOS应用内购买
- IOS iAD整合
- IOS GameKit
- IOS 故事板(Storyboards)
- IOS自动布局
- IOS-Twitter和Facebook
- IOS内存管理
- IOS应用程序调试
按钮使用
按钮使用
按钮用于处理用户操作。它截取触摸事件,并将消息发送到目标对象。
圆角矩形按钮
在 xib 中的按钮属性
您可以在Utility area(实用区域,窗口的右侧)的属性检查器的更改 xib 按钮属性。
按钮类型
- UIButtonTypeCustom
- UIButtonTypeRoundedRect
- UIButtonTypeDetailDisclosure
- UIButtonTypeInfoLight
- UIButtonTypeInfoDark
- UIButtonTypeContactAdd
重要的属性
- imageView
- titleLabel
重要的方法
+ (id)buttonWithType:(UIButtonType)buttonType
- (UIImage *)backgroundImageForState:(UIControlState)state
- (UIImage *)imageForState:(UIControlState)state
- (void)setTitle:(NSString *)title forState:(UIControlState)state
- (void)addTarget:(id)target action:(SEL)action forControlEvents: (UIControlEvents) controlEvents添加自定义方法?addDifferentTypesOfButton
-(void)addDifferentTypesOfButton { // A rounded Rect button created by using class method UIButton *roundRectButton = [UIButton buttonWithType: UIButtonTypeRoundedRect]; [roundRectButton setFrame:CGRectMake(60, 50, 200, 40)]; // sets title for the button [roundRectButton setTitle:@"Rounded Rect Button" forState: UIControlStateNormal]; [self.view addSubview:roundRectButton]; UIButton *customButton = [UIButton buttonWithType: UIButtonTypeCustom]; [customButton setBackgroundColor: [UIColor lightGrayColor]]; [customButton setTitleColor:[UIColor blackColor] forState: UIControlStateHighlighted]; //sets background image for normal state [customButton setBackgroundImage:[UIImage imageNamed: @"Button_Default.png"] forState:UIControlStateNormal]; //sets background image for highlighted state [customButton setBackgroundImage:[UIImage imageNamed: @"Button_Highlighted.png"] forState:UIControlStateHighlighted]; [customButton setFrame:CGRectMake(60, 100, 200, 40)]; [customButton setTitle:@"Custom Button" forState:UIControlStateNormal]; [self.view addSubview:customButton]; UIButton *detailDisclosureButton = [UIButton buttonWithType: UIButtonTypeDetailDisclosure]; [detailDisclosureButton setFrame:CGRectMake(60, 150, 200, 40)]; [detailDisclosureButton setTitle:@"Detail disclosure" forState: UIControlStateNormal]; [self.view addSubview:detailDisclosureButton]; UIButton *contactButton = [UIButton buttonWithType: UIButtonTypeContactAdd]; [contactButton setFrame:CGRectMake(60, 200, 200, 40)]; [self.view addSubview:contactButton]; UIButton *infoDarkButton = [UIButton buttonWithType: UIButtonTypeInfoDark]; [infoDarkButton setFrame:CGRectMake(60, 250, 200, 40)]; [self.view addSubview:infoDarkButton]; UIButton *infoLightButton = [UIButton buttonWithType: UIButtonTypeInfoLight]; [infoLightButton setFrame:CGRectMake(60, 300, 200, 40)]; [self.view addSubview:infoLightButton]; }
注意:
我们将命名为"Button_Default.png"和"Button_Highlighted.png"的个图像添加到我们的项目,可以通过将图像拖到列出了我们的项目文件的导航区域来完成。
在 ViewController.m 中更新 viewDidLoad,如下所示
(void)viewDidLoad { [super viewDidLoad]; //The custom method to create our different types of button is called [self addDifferentTypesOfButton]; //Do any additional setup after loading the view, typically from a nib }
输出
现在当我们运行应用程序时我们就会得到下面的输出:
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