UI中一些不常用的控件UIActivityIndicatorView、UIProgressView、UISegmentedControl、UIStepper、UISwitch、UITextView、UIAlertController

 //UIActivityIndicatorView //小菊花，加载

 #import "ActivityIndicatorVC.h"

 @interface ActivityIndicatorVC (){
     UIActivityIndicatorView *_activity ;
 }

 @end

 @implementation ActivityIndicatorVC

 -(void)viewDidLoad{
     [super viewDidLoad];

     [self createActivityIndicator];

 }

 -(void)createActivityIndicator{
     //创建对象
     _activity = [[UIActivityIndicatorView alloc]initWithFrame:CGRectMake(, , , )];

     _activity.backgroundColor = [UIColor blackColor];

     _activity.activityIndicatorViewStyle = UIActivityIndicatorViewStyleWhiteLarge;

     [self.view addSubview:_activity];

     //让状态栏中的activityIndicator显示出来
     [[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:YES];

     //开始动画
     [_activity startAnimating];

 }

     // 想要停止的话添加
     // [_activity stopAnimating];
     //[[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:NO];

 @end

 45 // UIProgressView //进度条
 #import "ProgressVC.h"

 @implementation ProgressVC{
     UIProgressView *_progress ;
     NSTimer *_timer;
 }

 -(void)viewDidLoad{
     [super viewDidLoad];

     self.btn.hidden = YES;

     [self createProgress];

     [self createTimer];
 }

 -(void)createProgress{
     _progress = [[UIProgressView alloc]initWithFrame:CGRectMake(, , , )];
     [self.view addSubview:_progress];
 //    progress.backgroundColor = [UIColor lightGrayColor];

     _progress.tintColor = [UIColor redColor];

     _progress.progressTintColor = [UIColor greenColor];
     _progress.trackTintColor = [UIColor blueColor];

     _progress.progress = 0.01;
 }

 -(void)createTimer{
     _timer = [NSTimer scheduledTimerWithTimeInterval:0.1 target:self selector:@selector(run ) userInfo:nil repeats:YES];
 }

 -(void)run{
     _progress.progress += 0.01;
 }

 @end

 90   // UISegmentedControl //分段

 -(void)viewDidLoad{
     [super viewDidLoad];

     self.btn.hidden = YES;

     [self createSegment];
 }

 -(void)createSegment{

     NSArray *items = @[@"", @"", @""];

     UISegmentedControl *segment = [[UISegmentedControl alloc] initWithItems:items];

     segment.frame = CGRectMake(, , , );
     segment.backgroundColor = [UIColor magentaColor];
     segment.tintColor = [UIColor yellowColor];
     segment.selectedSegmentIndex = ;

     [segment insertSegmentWithTitle:@"" atIndex: animated:YES];
     [segment insertSegmentWithImage:[UIImage imageNamed:@"tab_0"] atIndex: animated:YES];
     //让图片显示原始图片
     UIImage *img = [[UIImage imageNamed:@"tab_0"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];

     [segment insertSegmentWithImage:img atIndex: animated:YES];

     [self.view addSubview:segment];

     //添加事件
     [segment addTarget:self action:@selector(segmentSelected:) forControlEvents:UIControlEventValueChanged];

 }

 -(void)segmentSelected:(UISegmentedControl *)segment{
     NSLog(@"%ld", segment.selectedSegmentIndex);
 }

 //UIStepper //步进

 -(void)viewDidLoad{
     [super viewDidLoad];

     self.btn.hidden = YES;

     [self createStepper];
 }

 -(void)createStepper{
     UIStepper *stepper =[[ UIStepper alloc]initWithFrame:CGRectMake(, , , )];
     [self.view addSubview:stepper];

     stepper.tintColor = [UIColor redColor];
     stepper.backgroundColor = [UIColor greenColor];

     stepper.minimumValue = ;
     stepper.maximumValue = ;
     stepper.stepValue = ;
     stepper.wraps = YES;
     stepper.autorepeat = YES;

     [stepper addTarget:self action:@selector(steperValueChanged:) forControlEvents:UIControlEventValueChanged];
 }

 -(void)steperValueChanged:(UIStepper *)stepper{
     NSLog(@"%f", stepper.value);

 }

 //UISwitch  //开关

 -(void)viewDidLoad{
     [super viewDidLoad];

     self.btn.hidden = YES;

     [self createSwitch];
 }

 -(void)createSwitch{
     UISwitch *mySwitch = [[UISwitch alloc]initWithFrame:CGRectMake(, , , )];

     mySwitch.onTintColor = [UIColor redColor];
     mySwitch.tintColor = [UIColor greenColor];

     [self.view addSubview:mySwitch];

     [mySwitch addTarget:self action:@selector(switchValueChanged:) forControlEvents:UIControlEventValueChanged];
 }

 -(void)switchValueChanged:(UISwitch *)mySwitch{
     if (mySwitch.isOn) {
         NSLog(@"on");
     }  else{
         NSLog(@"off");
     }
 }

 //UITextView //文本
 -(void)viewDidLoad{
     [super viewDidLoad];

     self.btn.hidden = YES;

     [self createTextView];
 }

 -(void)createTextView{
     UITextView *textView = [[UITextView alloc]initWithFrame:CGRectMake(, , , )];

     [self.view addSubview:textView   ];
 }

 //UIAlertController //警报管理
 - (void)btnClicked {

     UIAlertController *alertCtrl = [UIAlertController alertControllerWithTitle:@"删除" message:@"是否确定要删除该数据" preferredStyle:UIAlertControllerStyleActionSheet];
     UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:nil ];
     UIAlertAction *deleteAction = [UIAlertAction actionWithTitle:@"删除" style:UIAlertActionStyleDestructive handler:^(UIAlertAction * _Nonnull action) {
         NSLog(@"具体的删除数据的代码");
     }];

     [alertCtrl addAction:cancelAction];
     [alertCtrl addAction:deleteAction];

     [self presentViewController:alertCtrl animated:YES completion:nil];

 }

 - (void)btnClicked3 {

     UIAlertController *alertCtrl = [ UIAlertController alertControllerWithTitle:@"警告" message:@"需要输入用户名和密码" preferredStyle:UIAlertControllerStyleAlert];
     // 添加文本框
     [alertCtrl addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {
         // 可以对文本框进行设置
        textField.placeholder = @"用户名";
     }];

     [alertCtrl addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {
         textField.placeholder = @"密码";
         textField.secureTextEntry = YES;

         [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(pwdTextChanged) name:UITextFieldTextDidChangeNotification object:textField];
     }];

     // 添加一个动作，就是一个按钮
     UIAlertAction *action2 = [UIAlertAction actionWithTitle:@"登录" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
         // 用户点击这个按钮的操作
         NSLog(@"用户名：%@, 密码：%@", alertCtrl.textFields[].text , alertCtrl.textFields[].text );
     }];
     action2.enabled = NO;
     [alertCtrl addAction:action2];

     // 弹出提示信息框
     [self presentViewController:alertCtrl animated:YES completion:nil];

 }

 -(void)pwdTextChanged{
     // 取得弹出的UIAlertController对象
     UIAlertController *alertCtrl = (UIAlertController *)  self.presentedViewController;
     if (alertCtrl) {
         UIAlertAction *loginAction = alertCtrl.actions.firstObject;
         loginAction.enabled = YES;
     }

 }

 - (void)btnClicked2 {

     UIAlertController *alertCtrl = [ UIAlertController alertControllerWithTitle:@"警告" message:@"电量低" preferredStyle:UIAlertControllerStyleAlert];

     UIAlertAction *action1 = [UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:nil];
     UIAlertAction *action2 = [UIAlertAction actionWithTitle:@"知道了" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
         NSLog(@"知道了");
     }];
     [alertCtrl addAction:action1];
     [alertCtrl addAction:action2];

     [self presentViewController:alertCtrl animated:YES completion:nil];

 }