UISwitch，UISegmentedControl及UISlider的初步学习

// AppDelegate.h #import <UIKit/UIKit.h> @interface AppDelegate : UIResponder <UIApplicationDelegate> @property (strong, nonatomic) UIWindow *window; @end 复制代码// AppDelegate.m #import "AppDelegate.h" #import "ViewController.h" @interface AppDelegate () @end @implementation AppDelegate - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {self.window = [[UIWindow alloc]initWithFrame:[UIScreen mainScreen].bounds];self.window.backgroundColor = [UIColor whiteColor];ViewController *viewController = [[ViewController alloc]init];UINavigationController * navigationController = [[UINavigationController alloc]initWithRootViewController:viewController];self.window.rootViewController = navigationController;[self.window makeKeyAndVisible];return YES; } - (void)applicationWillResignActive:(UIApplication *)application { } - (void)applicationDidEnterBackground:(UIApplication *)application { } - (void)applicationWillEnterForeground:(UIApplication *)application { } - (void)applicationDidBecomeActive:(UIApplication *)application { } - (void)applicationWillTerminate:(UIApplication *)application { } @end 复制代码// ViewController.h #import <UIKit/UIKit.h> @interface ViewController : UIViewController @end 复制代码// ViewController.m #import "ViewController.h" #import "DemonstrationController.h" #import "RightController.h" @interface ViewController () @property(strong,nonatomic)UISwitch *rightSwitch; @property(strong,nonatomic)UISwitch *leftSwitch; @property(strong,nonatomic)UILabel *sliderValue; @end @implementation ViewController - (void)viewDidLoad {[super viewDidLoad];CGRect screen = [[UIScreen mainScreen] bounds];CGFloat switchScreenSpace = 39;//初始化开关控件self.rightSwitch = [[UISwitch alloc] init];CGRect frame = self.rightSwitch.frame;//origin：表示控件的坐标原点frame.origin = CGPointMake(switchScreenSpace,98);//重新设置控件的位置self.rightSwitch.frame = frame;//设置控件的状态self.rightSwitch.on = true;//添加事件[self.rightSwitch addTarget:self action:@selector(switchValueChanged:) forControlEvents:UIControlEventValueChanged];//添加开关控件到控制器视图[self.view addSubview:self.rightSwitch];self.leftSwitch = [[UISwitch alloc] init];frame = self.leftSwitch.frame;frame.origin = CGPointMake(screen.size.width - (frame.size.width + switchScreenSpace), 98);self.leftSwitch.frame = frame;self.leftSwitch.on = true;[self.leftSwitch addTarget:self action:@selector(switchValueChanged:) forControlEvents:UIControlEventValueChanged];[self.view addSubview:self.leftSwitch];NSArray *segments = @[@"right",@"left"];//初始化分段控制器UISegmentedControl *segmentedControl = [[UISegmentedControl alloc]initWithItems:segments];CGFloat scWidth = 220;CGFloat scHeight = 29;//29为默认高度CGFloat scTopView = 186;frame = CGRectMake((screen.size.width - scWidth)/2, scTopView, scWidth, scHeight);segmentedControl.frame = frame;//添加事件[segmentedControl addTarget:self action:@selector(tounchDow:) forControlEvents:UIControlEventValueChanged];//将分段控制器添加到控制器视图[self.view addSubview:segmentedControl];CGFloat sliderWidth = 300;CGFloat sliderHeight = 31;///默认高度CGFloat sliderTopView = 298;//初始化滑块控件UISlider *slider = [[UISlider alloc]initWithFrame:CGRectMake((screen.size.width - sliderWidth)/2, sliderTopView, sliderWidth, sliderHeight)];slider.minimumValue = 0.0f;//设置最小值slider.maximumValue = 100.0f;//设置最大值slider.value = 50.0f;//设置默认值//添加事件[slider addTarget:self action:@selector(sliderValueChange:) forControlEvents:UIControlEventValueChanged];//添加滑块控件到控制器视图[self.view addSubview:slider];//添加labelSliderValue标签CGFloat labelSliderValueSliderSpace = 30;//初始化标签UILabel *labelSliderValue = [[UILabel alloc]initWithFrame:CGRectMake(slider.frame.origin.x, slider.frame.origin.y - labelSliderValueSliderSpace, 103, 21)];labelSliderValue.text = @"SliderValue";[self.view addSubview:labelSliderValue];//添加sliderValueself.sliderValue = [[UILabel alloc]initWithFrame:CGRectMake(labelSliderValue.frame.origin.x + 120, labelSliderValue.frame.origin.y, 50, 21)];self.sliderValue.text = @"50";[self.view addSubview:self.sliderValue]; } //用标签显示滑块的值 -(void)sliderValueChange:(id)sender{UISlider *slider = (UISlider *) sender;int progressAsInt = (int)(slider.value);NSString * newText = [[NSString alloc]initWithFormat:@"%d",progressAsInt];NSLog(@"滑块的值 : %@",newText);self.sliderValue.text = newText; } //点击分段控件控制分段开关的隐藏和显示 -(void)tounchDow:(id)sender{UISegmentedControl *segmentedControl = (UISegmentedControl *)sender;NSLog(@"选择的段 ： %li",segmentedControl.selectedSegmentIndex);if(self.rightSwitch.hidden){self.rightSwitch.hidden = false;self.leftSwitch.hidden = false;DemonstrationController *demonstration = [[DemonstrationController alloc]init];//把当前控制器作为背景self.definesPresentationContext = YES;//设置模态视图弹出样式demonstration.modalPresentationStyle = UIModalPresentationOverFullScreen;//模态切换的方式跳转[self presentViewController:demonstration animated:YES completion:nil];}else{self.rightSwitch.hidden = true;self.leftSwitch.hidden = true;RightController *right = [[RightController alloc]init];//导航控制器入栈的方式跳转[self.navigationController pushViewController:right animated:YES];} } ///使两个开关的值保持一致 -(void)switchValueChanged:(id)sender{UISwitch *witch = (UISwitch *)sender;//判断开关状态BOOL setting = witch.isOn;[self.rightSwitch setOn:setting animated:true];[self.leftSwitch setOn:setting animated:true]; } @end 复制代码// DemonstrationController.h #import <UIKit/UIKit.h> #import "ShadowController.h" @interface DemonstrationController : ShadowController @end 复制代码// DemonstrationController.m #import "DemonstrationController.h" #import "RightController.h" #import <objc/runtime.h> static void * KEY_IS_CLOSED = &KEY_IS_CLOSED; @interface DemonstrationController ()@end@implementation DemonstrationController- (void)viewDidLoad {[super viewDidLoad];CGRect screen = [[UIScreen mainScreen]bounds];CGFloat viewWidth = 150.0;CGFloat viewHeight = 150.0;CGFloat buttonWidth = 100;CGFloat buttonHeight = 30;//监听通知[[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(fun) name:@"tongzhi" object:nil];//初始化UIViewUIView *view = [[UIView alloc]initWithFrame:CGRectMake((screen.size.width - viewWidth)/2, (screen.size.height - viewHeight) / 2, viewWidth, viewHeight)];//设置背景颜色view.backgroundColor = [UIColor orangeColor];//将UIView添加到控制器视图[self.view addSubview:view];//初始化按钮并设置样式UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];//设置按钮标题[button setTitle:@"前往右控制器" forState:UIControlStateNormal];//设置按钮标题颜色[button setTitleColor:[UIColor greenColor] forState:UIControlStateNormal];//设置按钮标题字体大小button.titleLabel.font = [UIFont systemFontOfSize:15];//设置按钮背景颜色[button setBackgroundColor:[UIColor blueColor]];//设置按钮位置button.frame = CGRectMake((viewWidth - buttonWidth)/2, (viewHeight - buttonHeight)/2, buttonWidth, buttonHeight);//添加按钮到UIView[view addSubview:button];//添加事件[button addTarget:self action:@selector(onClick) forControlEvents:UIControlEventTouchUpInside]; } -(void)onClick{RightController *right = [[RightController alloc]init];[self presentViewController:right animated:YES completion:nil]; }-(void)fun{//延时执行方法[self performSelector:@selector(jumpRootController) withObject:nil afterDelay:0.5]; }-(void)jumpRootController{//关闭当前控制器[self closeCurrentViewController]; }#pragma mark - Close current view controller.//关闭当前视图控制器 - (void)closeCurrentViewController {//注销当前view[self.view endEditing:YES];if (self.presentingViewController) {[self dismissViewControllerAnimated:YES completion:NULL];} else if (self.navigationController) {UINavigationController *navigationController = self.navigationController;NSMutableArray *viewControllers = [NSMutableArray arrayWithArray:navigationController.childViewControllers];if ([viewControllers indexOfObject:self] != (viewControllers.count - 1)) {if([self respondsToSelector:@selector(setClosed:)]) {[self setClosed:YES];}} else {[navigationController popViewControllerAnimated:YES];}}} - (void)setClosed:(BOOL)closed {//void objc_setAssociatedObject(id object, const void *key, id value, objc_AssociationPolicy policy);关联对象。需要#import <objc/runtime.h>。//应用场景：关联对象相当于实例变量，在类别(也有人管叫分类)里面，不能创建实例变量， 关联对象就可以解决这种问题。//相关参数：key：要保证全局唯一，key与关联的对象是一一对应关系,必须全局唯一,通常都是会采用静态变量来作为关键字 可以自己创建 也可以使用"@selector(methodName)"作为key。//value：要关联的对象。//policy：关联策略。有五种关联策略。//OBJC_ASSOCIATION_ASSIGN 等价于 @property(assign)。//OBJC_ASSOCIATION_RETAIN_NONATOMIC等价于 @property(strong, nonatomic)。//OBJC_ASSOCIATION_COPY_NONATOMIC等价于@property(copy, nonatomic)。//OBJC_ASSOCIATION_RETAIN等价于@property(strong,atomic)。//OBJC_ASSOCIATION_COPY等价于@property(copy, atomic)。objc_setAssociatedObject(self, KEY_IS_CLOSED, @(closed), OBJC_ASSOCIATION_RETAIN_NONATOMIC); } @end 复制代码// ShadowController.h //继承该控制器可以得到一个带阴影层的控制器 #import <UIKit/UIKit.h> @interface ShadowController : UIViewController @end 复制代码// ShadowController.m #define SCREEN_WIDTH [UIScreen mainScreen].bounds.size.width #define SCREEN_HEIGHT [UIScreen mainScreen].bounds.size.height #import "ShadowController.h"@interface ShadowController () @property (nonatomic, strong) UIView *shadowView; @end@implementation ShadowController- (instancetype)init {self = [super init];if (self) {//设置模态转换样式self.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;//设置模态表示样式self.modalPresentationStyle = UIModalPresentationOverCurrentContext;//设置背景颜色self.view.backgroundColor = [UIColor clearColor];self.shadowView = [[UIView alloc]init];//设置透明度self.shadowView.backgroundColor = [UIColor colorWithWhite:0 alpha:0.5];//设置位置self.shadowView.frame = CGRectMake(0, 64, SCREEN_WIDTH, SCREEN_HEIGHT);//将子控件插入到subviews数组中index这个位置[self.view insertSubview:self.shadowView atIndex:0];}return self; } @end 复制代码// RightController.h #import <UIKit/UIKit.h> #import "ShadowController.h" @interface RightController : ShadowController @end 复制代码// RightController.m#import "RightController.h" #import "ViewController.h" #import <objc/runtime.h> static void * KEY_IS_CLOSED = &KEY_IS_CLOSED; @interface RightController ()@end@implementation RightController- (void)viewDidLoad {[super viewDidLoad];CGRect screen = [[UIScreen mainScreen]bounds];CGFloat viewWidth = 150.0;CGFloat viewHeight = 150.0;CGFloat buttonWidth = 100;CGFloat buttonHeight = 30;UIView *view = [[UIView alloc]initWithFrame:CGRectMake((screen.size.width - viewWidth)/2, (screen.size.height - viewHeight) / 2, viewWidth, viewHeight)];view.backgroundColor = [UIColor redColor];[self.view addSubview:view];UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];[button setTitle:@"返回根控制器" forState:UIControlStateNormal];[button setTitleColor:[UIColor greenColor] forState:UIControlStateNormal];button.titleLabel.font = [UIFont systemFontOfSize:15];[button setBackgroundColor:[UIColor purpleColor]];button.frame = CGRectMake((viewWidth - buttonWidth)/2, (viewHeight - buttonHeight)/2, buttonWidth, buttonHeight);[view addSubview:button];[button addTarget:self action:@selector(onClick) forControlEvents:UIControlEventTouchUpInside]; } -(void)onClick{//注册通知[[NSNotificationCenter defaultCenter]postNotificationName:@"tongzhi" object:nil];[self closeCurrentViewController]; }#pragma mark - Close current view controller. - (void)closeCurrentViewController {[self.view endEditing:YES];if (self.presentingViewController) {[self dismissViewControllerAnimated:YES completion:NULL];} else if (self.navigationController) {UINavigationController *navigationController = self.navigationController;NSMutableArray *viewControllers = [NSMutableArray arrayWithArray:navigationController.childViewControllers];if ([viewControllers indexOfObject:self] != (viewControllers.count - 1)) {if([self respondsToSelector:@selector(setClosed:)]) {[self setClosed:YES];}} else {[navigationController popViewControllerAnimated:YES];}}} - (void)setClosed:(BOOL)closed {objc_setAssociatedObject(self, KEY_IS_CLOSED, @(closed), OBJC_ASSOCIATION_RETAIN_NONATOMIC); } @end 复制代码

转载于:https://juejin.im/post/5cb467895188257ab966d0b9

总结

以上是生活随笔为你收集整理的UISwitch，UISegmentedControl及UISlider的初步学习的全部内容，希望文章能够帮你解决所遇到的问题。

如果觉得生活随笔网站内容还不错，欢迎将生活随笔推荐给好友。