UI第二节——UIButton详解
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]]; UIViewController *controller = [[UIViewController alloc]init]; [self.window setRootViewController:controller]; // 创建UIButton,唯独UIButton的创建不一样 // UIButtonTypeSystem 系统默认的类型 // UIButtonTypeCustom 用户自定义类型 // UIButtonTypeContactAdd 文字前面会有一个 + 符号 // UIButtonTypeDetailDisclosure 会有一个 i 符号 // UIButtonTypeInfoLight // UIButtonTypeInfoDark // UIButtonTypeRoundedRect 跟UIButtonTypeSystem没有区别 UIButton *btn = [UIButton buttonWithType:UIButtonTypeSystem]; // 设置它的frame(位置) btn.frame = CGRectMake(20, 30, 335, 30); // NSLog(@"%f, %f", btn.frame.size.width, btn.frame.size.height); // btn.frame.origin // 原点坐标 // btn.frame.size // 大小 // 设置标题 // UIControlStateNormal 普通状态 // UIControlStateHighlighted 高亮状态 [btn setTitle:@"This is a Button" forState:UIControlStateNormal]; [btn setTitle:@"Heightlighted" forState:UIControlStateHighlighted]; // 设置Button的字体 btn.titleLabel.font = [UIFont systemFontOfSize:30]; // 调整Title位置 // top left bottom right 的偏移 btn.titleEdgeInsets = UIEdgeInsetsMake(0, -100, 0, 0); // 主题颜色 btn.tintColor = [UIColor whiteColor]; // 背景颜色 btn.backgroundColor = [UIColor redColor]; // 添加点击事件 // 让 target(谁) 去做 action (什么事) // 让AppDelegate对象去执行 btnClicked: 这个函数 [btn addTarget:self action:@selector(btnClicked:) forControlEvents:UIControlEventTouchUpInside]; // 把Button添加到Window上 [self.window addSubview:btn]; /****** 第二个Button ******/ UIButton *secondBtn = [UIButton buttonWithType:UIButtonTypeCustom]; secondBtn.frame = CGRectMake(20, 70, 335, 30); [secondBtn setTitle:@"Seconde Button" forState:UIControlStateNormal]; // clearColor 透明颜色 secondBtn.backgroundColor = [UIColor clearColor]; // 设置图片 // 加载项目中的图片 UIImage *image = [UIImage imageNamed:@"bc_btn_blue"]; NSLog(@"%f, %f", image.size.width, image.size.height); UIImage *heightlightedImage = [UIImage imageNamed:@"test"]; // 设置Button的背景图片 [secondBtn setBackgroundImage:image forState:UIControlStateNormal]; [secondBtn setBackgroundImage:heightlightedImage forState:UIControlStateHighlighted]; // 设置Button的图标 // 图标这里,只会要图片的形状 UIImage *iconImage = [UIImage imageNamed:@"IconEye"]; UIImage *heightlightedIconImage = [UIImage imageNamed:@"IconFlag"]; [secondBtn setImage:iconImage forState:UIControlStateNormal]; [secondBtn setImage:heightlightedIconImage forState:UIControlStateHighlighted]; // secondBtn.tintColor = [UIColor redColor]; [self.window addSubview:secondBtn]; self.window.backgroundColor = [UIColor whiteColor]; [self.window makeKeyAndVisible]; return YES; } - (void)btnClicked:(UIButton *)btn { NSLog(@"2222"); }
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