UI_06 UIControl及其子類

時間 2019-11-10

標籤 uicontrol 及其子類简体版

原文原文鏈接

⼀、UISegmentedControl的使⽤html

分段控件。每一個segment都能被點擊，至關於集成了若干個button。一般咱們會點擊不一樣的segment來切換不一樣的view。ios

一、常⽤⽅法和屬性app

initWithItems: //UISegmentedControl獨有的初始化⽅法，⽤來建立多個分段ide
setTitle: forSegmentAtIndex: //爲指定下標的分段設置titleatom
selectedSegmentAtIndex //（property）被選中的segmentspa
tintColor //（property）segmentedControl條的顏⾊（含每一個segment的顏⾊）.net
addTarget: action: forControlEvents://給UISegmentedControl添加事件，code
controlEvent //爲UIControlEventValueChanged。orm

二、使用視頻

RootViewController.m

#import "RootViewController.h"
#import "MessageViewController.h"
#import "PhoneViewController.h"

@interface RootViewController ()

@property (nonatomic, retain) UISegmentedControl *segmentedControl;

@property (nonatomic, retain) MessageViewController * messageVC;

@property (nonatomic, retain) PhoneViewController * phoneVC;

@end

@implementation RootViewController
- (void)dealloc
{
    [_segmentedControl release];
    [_messageVC release];
    [_phoneVC release];
    [super dealloc];
}
- (void)viewDidLoad {
    [super viewDidLoad];
    self.view.backgroundColor = [UIColor whiteColor];

#pragma mark -- 添加子視圖控制器 --
    [self createChildViewControllers];

#pragma mark -- UISegmentedControl --
    [self createSegmentedControl];

}

- (void)createChildViewControllers
{
    MessageViewController * messageVC = [[MessageViewController alloc] init];
    PhoneViewController * phoneVC = [[PhoneViewController alloc] init];

    self.phoneVC = phoneVC;
    self.messageVC = messageVC;

    [self addChildViewController:messageVC];
    [self addChildViewController:phoneVC];

    [messageVC release];
    [phoneVC release];

    [self.view addSubview:messageVC.view];

}

- (void)createSegmentedControl
{
    UIImage *image

= [UIImage imageNamed:@"bank_icon_ccb.png"];

    self.segmentedControl = [[UISegmentedControl alloc] initWithItems:@[@"消息",@"電話",image]];
    self.segmentedControl.frame = CGRectMake(100, 100, 150, 30);
    self.segmentedControl.selectedSegmentIndex = 0;
    //改變顏色
    _segmentedControl.tintColor = [UIColor redColor];
    [self.view addSubview:self.segmentedControl];
    [self.segmentedControl release];
    //添加事件

[_segmentedControl addTarget:self action:@selector(exchangeView:) forControlEvents:UIControlEventValueChanged];

    [self.segmentedControl release];
}

- (void)exchangeView:(UISegmentedControl *)SC
{
    NSLog(@"%ld", (long)SC.selectedSegmentIndex);
    switch (SC.selectedSegmentIndex) {
        case 0: {
            if (!self.messageVC.view.superview) {
                [_phoneVC.view removeFromSuperview];
                [self.view addSubview:_messageVC.view];
            }
            break;
        }
        case 1:
            if (!_phoneVC.view.superview) {
                [_messageVC.view removeFromSuperview];
                [self.view addSubview:_phoneVC.view];
            }
            break;
        default:
            break;
    }
    [self.view bringSubviewToFront:SC];
}

- (void)didReceiveMemoryWarning {

[super didReceiveMemoryWarning];

}

@end

⼆、UISlider的使⽤

滑塊控件。一般⽤於控制視頻播放進度，控制⾳量等。它也是繼承於UIControl，滑塊提供了⼀系列連續的值，滑塊停在不同的位置，獲取到滑塊上的值也不一樣。

一、UISlider常⽤屬性

minimumValue //設置滑塊的最⼩值
maximumValue //設置滑塊的最⼤值
value //設置滑塊的當前值
minimumTrackTinkColor //定義劃過區域的顏⾊
addTarget: action: forControlEvents: //給UISlider添加事件，
controlEvent //爲UIControlEventValueChanged。

二、UISlider使用

下面是UISlider與UIImageView的綜合使用。用UISlider控制動圖的播放速度（關於UIImageView的介紹請看前一篇）

RootViewController.m

#import "RootViewController.h"

@interface RootViewController ()
@property (nonatomic, retain) UIImageView *imgView;
@property (nonatomic, retain) UISlider *slider;

@end

@implementation RootViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    self.view.backgroundColor = [UIColor whiteColor];

#pragma mark -- 建立UIImageView --
    [self createImageView];
#pragma mark -- 建立UISlider --
    [self createSlider];
}

- (void)createSlider
{
    self.slider = [[UISlider alloc] initWithFrame:CGRectMake(50, 400, 267, 30)];
    [self.view addSubview:_slider];

    [_slider release];

    _slider.minimumValue = 1;
    _slider.maximumValue = 5; //最大值必須大於最小值
    _slider.minimumTrackTintColor = [UIColor redColor];
    _slider.maximumTrackTintColor = [UIColor blueColor];
    //設置滑塊
    [_slider setThumbImage:[UIImage imageNamed:@"greenbird.png"] forState:UIControlStateNormal];
    [_slider setThumbImage:[UIImage imageNamed:@"bluebird.png"] forState:UIControlStateHighlighted];
    [_slider addTarget:self action:@selector(changeSpeed:) forControlEvents:UIControlEventValueChanged];

}

- (void)changeSpeed:(UISlider *)slider
{
    if (slider.value==slider.minimumValue) {
        [self.imgView stopAnimating];
    } else if(slider.value != slider.maximumValue) {
        self.imgView.animationDuration = slider.maximumValue-slider.value;
        [self.imgView startAnimating];
    } else {
        self.imgView.animationDuration = 0.0001;
        [self.imgView startAnimating];
    }
}

- (void)createImageView
{
    self.imgView = [[UIImageView alloc] init];
    _imgView.frame = CGRectMake(50, 100, 250, 250);
    [self.view addSubview:_imgView];
    [_imgView release];

    NSMutableArray * imagesArray = [NSMutableArray array];
    for (int i = 1; i<28; i++) {
        [imagesArray addObject:[UIImage imageNamed:[NSString stringWithFormat:@"Z6CLNZ]T)N8I}L9A))7TRD9－%d（被拖移）.tiff", i]]];
    }
    _imgView.animationImages = imagesArray;
    _imgView.image = _imgView.animationImages[0];
}

- (void)didReceiveMemoryWarning {

[super didReceiveMemoryWarning];

}

@end

3、UIAlertController

RootViewController.m

#import "RootViewController.h"

@interface RootViewController ()
@property (nonatomic, retain) UITextField * textField;
@property (nonatomic, retain) UIButton *button;
@end

@implementation RootViewController

- (void)dealloc
{
    [_textField release];
    [_button release];
    [super dealloc];
}

- (void)viewDidLoad {
    [super viewDidLoad];

    self.textField = [[UITextField alloc] initWithFrame:CGRectMake(100, 100, 150, 30)];

    _textField.borderStyle = UITextBorderStyleRoundedRect;
    _textField.placeholder = @"請輸入密碼";
    [self.view addSubview:_textField];
    [_textField release];

    self.button = [UIButton buttonWithType:UIButtonTypeCustom];
    _button.frame = CGRectMake(150, 300, 60, 30);
    [_button setTitle:@"登錄" forState:UIControlStateNormal];
    [_button setTitleColor:[UIColor blueColor] forState:UIControlStateNormal];
    [_button addTarget:self action:@selector(login:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:_button];


    NSLog(@"%lu", self.retainCount);
}

- (void)login:(UIButton *)button
{
    NSString * infoStr;
    if ([_textField.text isEqualToString:@"123"]) {

infoStr = @"登陸成功";

#pragma mark -- UIAlertView -- //UIAlertView

UIAlertView * alertView = [[UIAlertView alloc] initWithTitle:@"登陸成功" message:infoStr delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"肯定", nil];
[alertView show];

[alertView release];

} else {

infoStr = @"登陸失敗";

#pragma mark -- UIAlertController -- //UIAlertController

UIAlertController * alertC = [UIAlertController alertControllerWithTitle:@"登陸信息" message:infoStr preferredStyle:UIAlertControllerStyleAlert];

//避免循環引用

//在block裏用到self，將self賦值給__block修飾的變量再使用

        __block RootViewController *rootVC = self;
        //在block裏用到實例變量（非屬性），用以下方式
        //    __block UITextField *textField = _textField;
        UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction *action) {
            [rootVC.textField resignFirstResponder];
        }];

UIAlertAction *reloginAction = [UIAlertAction actionWithTitle:@"從新登陸" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {

rootVC.textField.text = @"";
}];

        [alertC addAction:cancelAction];
        [alertC addAction:reloginAction];

        [self presentViewController:alertC animated:YES completion:nil];
    }

}

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
    NSLog(@"%@", _textField.text);
}

- (void)alertViewCancel:(UIAlertView *)alertView
{
    NSLog(@"canceled");
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];