iOS开发——基本控件（UIButton，UILabel，UITextField，UISwitch，UISlider，UISegmentedControl）

时间：2021-04-10 09:25:13
<pre name="code" class="objc"><p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; font-family: Menlo; color: rgb(75, 209, 87);">UIButton<span style="font-family: 'Heiti SC Light';">定制：</span></p>
 


 

UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];    button.frame = CGRectMake(240, 20, 80, 30);    button.tag = 10;    [button setTitle:@"Next"            forState:UIControlStateNormal];    [button addTarget:self               action:@selector(buttonPressed:)     forControlEvents:UIControlEventTouchUpInside];    [self.view addSubview:button];
 

    /* UIButton定制 */    // 定制按钮时采用类型UIButtonTypeCustom    UIButton *customButton = [UIButton buttonWithType:UIButtonTypeCustom];    customButton.frame = CGRectMake(20, 20, 50, 50);    customButton.backgroundColor = [UIColor clearColor];        // 定制标题文本    [customButton setTitle:@"1" forState:UIControlStateNormal];    [customButton setTitle:@"2" forState:UIControlStateHighlighted];        // 定制标题文本色    [customButton setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];    [customButton setTitleColor:[UIColor redColor] forState:UIControlStateHighlighted];        // 定制标题文本类型    customButton.titleLabel.font = [UIFont systemFontOfSize:30];        // 定制图片显示    // 1.配置图片    [customButton setImage:[UIImage imageNamed:@"开灯"] forState:UIControlStateNormal];    [customButton setImage:[UIImage imageNamed:@"关灯"] forState:UIControlStateHighlighted];    [customButton setImage:[UIImage imageNamed:@"关灯"] forState:UIControlStateSelected];    // 2.配置背景图    // [customButton setBackgroundImage:[UIImage imageNamed:@"开灯"] forState:UIControlStateNormal];    // [customButton setBackgroundImage:[UIImage imageNamed:@"关灯"] forState:UIControlStateHighlighted];        // 配置选中状态，默认为NO    customButton.selected = NO;    // 配置是否启用控件，默认为YES    customButton.enabled = YES;    customButton.tag = 11;        [customButton addTarget:self action:@selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside];        [self.view addSubview:customButton];



 

 

<pre name="code" class="objc">/* UILabel文本自适应 */    UIFont *font = [UIFont systemFontOfSize:15];    // 普通标签    UILabel *leftLabel = [[UILabel alloc] initWithFrame:CGRectMake(5, 300, 150, 30)];    leftLabel.text = LONG_STRING;    leftLabel.font = font;    leftLabel.backgroundColor = [UIColor greenColor];    [self.view addSubview:leftLabel];    [leftLabel release];        // 计算文本所占用空间大小    // 定义计算空间边界大小    CGSize constraintSize = CGSizeMake(150, 300);    // 配置文本绘制选项    NSStringDrawingOptions options = NSStringDrawingTruncatesLastVisibleLine | NSStringDrawingUsesFontLeading | NSStringDrawingUsesLineFragmentOrigin;    // 配置计算属性参数    NSDictionary *attributes = @{NSFontAttributeName: font};    CGRect rect = [LONG_STRING boundingRectWithSize:constraintSize options:options attributes:attributes context:nil];    
 

<p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; font-family: Menlo; color: rgb(75, 209, 87);">UILabel定制：</p>    // 适应标签    UILabel *rightLabel = [[UILabel alloc] initWithFrame:CGRectMake(CGRectGetMaxX(leftLabel.frame) + 5, leftLabel.frame.origin.y, CGRectGetWidth(rect), CGRectGetHeight(rect))];    rightLabel.text = LONG_STRING;    rightLabel.font = font;    rightLabel.backgroundColor = [UIColor greenColor];    // 配置可显示的行数，0表示不限制行数    rightLabel.numberOfLines = 0;    // 配置换行模式    rightLabel.lineBreakMode = NSLineBreakByCharWrapping;    [self.view addSubview:rightLabel];    [rightLabel release];



 

<p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; font-family: Menlo; color: rgb(75, 209, 87);">UITextField<span style="font-family: 'Heiti SC Light';">定制：</span></p>
 

 

<pre name="code" class="objc">/* UITextField定制 */
    UITextField *textField = [[UITextField alloc] init];
    textField.bounds = CGRectMake(0, 0, 200, 25);
    textField.center = CGPointMake(160, 200);
    textField.borderStyle = UITextBorderStyleLine;
    textField.placeholder = @"请输入文本...";
    textField.font = font;
    // 配置委托对象
    textField.delegate = self;
    // 配置键盘显示类型
    textField.keyboardType = UIKeyboardTypeDefault;
    // 配置是否使用安全输入
    textField.secureTextEntry = NO;
    // 配置清除按钮显示逻辑
    textField.clearButtonMode = UITextFieldViewModeWhileEditing;
    // 配置是否自动大小写
    textField.autocapitalizationType = UITextAutocapitalizationTypeNone;
    // 配置是否自动更正
    textField.autocorrectionType = UITextAutocorrectionTypeNo;
    [self.view addSubview:textField];
    [textField release];



#pragma mark - UITextFieldDelegate methods
 

 

<pre name="code" class="objc">// 每次键盘文本输入时调用
// 文本限制：文本长度限制、文本输入内容限制
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {

    NSLog(@"range = %@ string = %@", NSStringFromRange(range), string);

    // 处理退格键
    if (string.length == 0) {
        return YES;
    }

    // 限制文本长度10
    if (range.location > 9) {
        return NO;
    }

    // 限制文本输入
    if ([@"1234567890" rangeOfString:string].location == NSNotFound) {
        return NO;
    }

    return YES;
}

// 是否可以开始编辑
- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField {

    NSLog(@"%@", NSStringFromSelector(_cmd));
    return YES;
}

// 开始编辑
- (void)textFieldDidBeginEditing:(UITextField *)textField {

    NSLog(@"%@", NSStringFromSelector(_cmd));
}

// 点击确认按钮时调用
- (BOOL)textFieldShouldReturn:(UITextField *)textField {

    NSLog(@"%@", NSStringFromSelector(_cmd));

    // 关闭键盘
    [textField resignFirstResponder];
    return YES;
}

// 编辑完成
- (void)textFieldDidEndEditing:(UITextField *)textField {

    NSLog(@"%@", NSStringFromSelector(_cmd));
}
 




<p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; font-family: Menlo; color: rgb(75, 209, 87);">UISwitch <span style="font-family: 'Heiti SC Light';">开关定制：</span></p>
 

    // UISwitch 开关    UISwitch *switchControl = [[UISwitch alloc] init];    switchControl.bounds = CGRectMake(0, 0, 50, 30);    switchControl.center = CGPointMake(160, 100);        switchControl.onTintColor = [UIColor redColor];    switchControl.tintColor = [UIColor darkGrayColor];    switchControl.thumbTintColor = [UIColor blackColor];        [switchControl addTarget:self action:@selector(processControl:) forControlEvents:UIControlEventValueChanged];        [self.view addSubview:switchControl];    [switchControl release];    
 

<p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; font-family: Menlo; color: rgb(75, 209, 87);">UISlider <span style="font-family: 'Heiti SC Light';">滑条定制：</span></p>    // UISlider 滑条    UISlider *slider = [[UISlider alloc] init];    slider.bounds = CGRectMake(0, 0, 200, 30);    slider.center = CGPointMake(160, 180);    slider.minimumValue = 0.0;    slider.maximumValue = 1.0;    slider.value = 1.0;    slider.maximumTrackTintColor = [UIColor grayColor];    slider.minimumTrackTintColor = [UIColor redColor];    [slider addTarget:self action:@selector(processControl:) forControlEvents:UIControlEventValueChanged];    [self.view addSubview:slider];    [slider release];    
 

<p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; font-family: Menlo; color: rgb(75, 209, 87);"> UISegmentedControl <span style="font-family: 'Heiti SC Light';">分段控件定制：</span></p>    // UISegmentedControl 分段控件    UISegmentedControl *segmentedControl = [[UISegmentedControl alloc] initWithItems:@[@"白色", @"红色", @"绿色", @"黄色"]];    segmentedControl.bounds = CGRectMake(0, 0, 200, 30);    segmentedControl.center = CGPointMake(160, 284);    segmentedControl.tintColor = [UIColor blackColor];    // 配置当前分段选中索引    segmentedControl.selectedSegmentIndex = 0;    [segmentedControl addTarget:self action:@selector(processControl:) forControlEvents:UIControlEventValueChanged];    [self.view addSubview:segmentedControl];    [segmentedControl release];  



<p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; font-family: Menlo; color: rgb(75, 209, 87);">UIActivityIndicatorView <span style="font-family: 'Heiti SC Light';">进度指示器定制：</span></p>      // UIActivityIndicatorView 进度指示器
 

<pre name="code" class="objc">    <pre name="code" class="objc">UIActivityIndicatorView *<span style="font-family: Arial, Helvetica, sans-serif;">activityIndicatorView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];</span>
 activityIndicatorView.center = CGPointMake(CGRectGetMidX(self.view.bounds), CGRectGetMidY(self.view.bounds)); [self.view addSubview:activityIndicatorView]; 

}- (void)processControl:(UIControl *)sender { // 开关 if ([sender isKindOfClass:[UISwitch class]]) { UISwitch *switchControl = (UISwitch *)sender; self.view.backgroundColor = switchControl.isOn ? switchControl.onTintColor : [UIColor whiteColor]; } // 滑条 else if ([sender isKindOfClass:[UISlider class]]) { UISlider *slider = (UISlider *)sender; self.view.alpha = slider.value; } // 分段控件 else if ([sender isKindOfClass:[UISegmentedControl class]]) { UISegmentedControl *segmentedControl = (UISegmentedControl *)sender; NSArray *colors = @[[UIColor whiteColor], [UIColor redColor], [UIColor greenColor], [UIColor yellowColor]]; self.view.backgroundColor = colors[segmentedControl.selectedSegmentIndex]; }} 

 



 

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