设计多选一按钮ChooseOnlyButton

设计多选一按钮ChooseOnlyButton

效果:

源码:

ChooseOnlyButton.h 与 ChooseOnlyButton.m

//
//  ChooseOnlyButton.h
//  ChooseOnlyButton
//
//  Created by YouXianMing on 14/11/4.
//  Copyright (c) 2014年 YouXianMing. All rights reserved.
//

#import <UIKit/UIKit.h>
@class ChooseOnlyButton;

@protocol ChooseOnlyButtonDelegate <NSObject>
@optional
- (void)chooseButtonTitle:(NSString *)title;
@end

@interface ChooseOnlyButton : UIView

/**
 *  代理
 */
@property (nonatomic, assign) id<ChooseOnlyButtonDelegate>  delegate;

/**
 *  选取的按钮的标题(只读)
 */
@property (nonatomic, strong, readonly)  NSString *selectedTitle;

/**
 *  标题的数组
 */
@property (nonatomic, strong) NSArray  *titles;

/**
 *  按钮离左侧的距离
 */
@property (nonatomic, assign) CGFloat   gapFromLeft;

/**
 *  两个按钮之间的水平距离
 */
@property (nonatomic, assign) CGFloat   gapFromHorizontalButton;

/**
 *  两个按钮之间的垂直间距
 */
@property (nonatomic, assign) CGFloat   gapFromVerticalButton;

/**
 *  按钮高度
 */
@property (nonatomic, assign) CGFloat   buttonHeight;

/**
 *  按钮标题字体
 */
@property (nonatomic, strong) UIFont   *buttonTitleFont;

/**
 *  没有选中状态下的按钮的背景颜色以及按钮字体的颜色
 */
@property (nonatomic, strong) UIColor  *normalButtonBackgroundColor;
@property (nonatomic, strong) UIColor  *normalButtonTitleColor;

/**
 *  选中状态下的按钮的背景颜色以及按钮字体的颜色
 */
@property (nonatomic, strong) UIColor  *selectedButtonBackgroundColor;
@property (nonatomic, strong) UIColor  *selectedButtonTitleColor;

/**
 *  重设view的尺寸并且创建出新的按钮
 */
- (void)resetSizeAndCreateButtons;

/**
 *  重新计算frame
 *
 *  @return frame值
 */
- (CGRect)calculateFrame;

@end

//
//  ChooseOnlyButton.m
//  ChooseOnlyButton
//
//  Created by YouXianMing on 14/11/4.
//  Copyright (c) 2014年 YouXianMing. All rights reserved.
//

#import "ChooseOnlyButton.h"

@implementation ChooseOnlyButton

- (instancetype)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {

    }
    return self;
}

- (void)resetSizeAndCreateButtons {

    // 没有元素则退出
    if (_titles.count == ) {
        return;
    }

    // 没有设置左边距则默认值为5.f
    if (_gapFromLeft == ) {
        _gapFromLeft = .f;
    }

    // 没有设置水平按钮间距则默认值为5.f
    if (_gapFromHorizontalButton == ) {
        _gapFromHorizontalButton = .f;
    }

    // 没有设置垂直按钮间距则默认值为5.f
    if (_gapFromVerticalButton == ) {
        _gapFromVerticalButton = .f;
    }

    // 没有设置按钮高度则按钮默认高度为20.f
    if (_buttonHeight == ) {
        _buttonHeight = .f;
    }

    // 获取frame宽度
    CGFloat frameWidth  = self.bounds.size.width;

    // 计算出按钮宽度
    CGFloat buttonWidth = (frameWidth - _gapFromLeft* - _gapFromHorizontalButton)/.f;

    // 动态创建出按钮
    for (int i = ; i < _titles.count; i++) {
        UIButton *button = [[UIButton alloc] initWithFrame:\
                            CGRectMake(_gapFromLeft + (buttonWidth + _gapFromHorizontalButton)*(i%),
                                       (i/)*(_buttonHeight + _gapFromVerticalButton),
                                       buttonWidth,
                                       _buttonHeight)];

        // 设置按钮圆角
        button.layer.cornerRadius = _buttonHeight/.f;
        [button addTarget:self
                   action:@selector(buttonsEvent:)
         forControlEvents:UIControlEventTouchUpInside];

        // 设置按钮标题 + 默认的标题颜色
        [button setTitle:_titles[i] forState:UIControlStateNormal];
        [self normalButtonStyle:button];

        // 设置字体
        if (_buttonTitleFont) {
            button.titleLabel.font = _buttonTitleFont;
        }

        [self addSubview:button];
    }

    // 重设自身view高度
    CGFloat selfViewHeight = _buttonHeight*((_titles.count - )/ + ) + _gapFromVerticalButton*((_titles.count - )/);
    CGRect rect            = self.frame;
    rect.size.height       = selfViewHeight;
    self.frame             = rect;
}

- (CGRect)calculateFrame {

    // 没有元素则退出
    if (_titles.count == ) {
        return CGRectZero;
    }

    // 没有设置左边距则默认值为5.f
    if (_gapFromLeft == ) {
        _gapFromLeft = .f;
    }

    // 没有设置水平按钮间距则默认值为5.f
    if (_gapFromHorizontalButton == ) {
        _gapFromHorizontalButton = .f;
    }

    // 没有设置垂直按钮间距则默认值为5.f
    if (_gapFromVerticalButton == ) {
        _gapFromVerticalButton = .f;
    }

    // 没有设置按钮高度则按钮默认高度为20.f
    if (_buttonHeight == ) {
        _buttonHeight = .f;
    }

    // 根据控件的一些参数计算出高度
    CGFloat selfViewHeight = _buttonHeight*((_titles.count - )/ + ) + _gapFromVerticalButton*((_titles.count - )/);
    CGRect rect            = self.frame;
    rect.size.height       = selfViewHeight;

    // 返回控件
    return rect;
}

- (void)buttonsEvent:(UIButton *)button {

    [[self subviews] enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
        if ([obj isKindOfClass:[UIButton class]]) {
            if ([button isEqual:obj]) {
                // 选中按钮的样式
                [self selectButtonStyle:obj];

                UIButton *button = (UIButton *)obj;

                // 获取到选取的按钮标题
                _selectedTitle = button.titleLabel.text;

                // 代理
                if (_delegate && [_delegate respondsToSelector:@selector(chooseButtonTitle:)]) {

                    [_delegate chooseButtonTitle:button.titleLabel.text];
                }
            } else {
                [self normalButtonStyle:obj];
            }
        }
    }];
}

#pragma mark - 私有方法
/**
 *  普通按钮的样式
 *
 *  @param button 要改变样式的按钮
 */
- (void)normalButtonStyle:(UIButton *)button {

    if (_normalButtonTitleColor) {
        [button setTitleColor:_normalButtonTitleColor
                     forState:UIControlStateNormal];
    } else {
        [button setTitleColor:[UIColor colorWithRed:0.000 green:0.361 blue:0.671 alpha:]
                     forState:UIControlStateNormal];
    }

    if (_normalButtonBackgroundColor) {
        button.backgroundColor = _normalButtonBackgroundColor;
    } else {
        button.backgroundColor = [UIColor clearColor];
    }

    button.layer.borderColor = [UIColor colorWithRed:0.843 green:0.843 blue:0.843 alpha:].CGColor;
    button.layer.borderWidth = .f;
}

/**
 *  选中按钮时的样式
 *
 *  @param button 要改变样式的按钮
 */
- (void)selectButtonStyle:(UIButton *)button {

    if (_selectedButtonTitleColor) {
        [button setTitleColor:_selectedButtonTitleColor
                     forState:UIControlStateNormal];
    } else {
        [button setTitleColor:[UIColor colorWithRed:0.973 green:0.984 blue:0.988 alpha:]
                     forState:UIControlStateNormal];
    }

    if (_selectedButtonBackgroundColor) {
        button.backgroundColor = _selectedButtonBackgroundColor;
    } else {
        button.backgroundColor = [UIColor colorWithRed:0.055 green:0.365 blue:0.663 alpha:];
    }

    button.layer.borderColor = [UIColor colorWithRed:0.055 green:0.365 blue:0.663 alpha:].CGColor;
    button.layer.borderWidth = .f;
}

@end

使用时候的源码:

//
//  ViewController.m
//  ChooseOnlyButton
//
//  Created by YouXianMing on 14/11/4.
//  Copyright (c) 2014年 YouXianMing. All rights reserved.
//

#import "ViewController.h"
#import "ChooseOnlyButton.h"

@interface ViewController ()<ChooseOnlyButtonDelegate>

{
    ChooseOnlyButton *button;
}

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    UILabel *label      = [[UILabel alloc] initWithFrame:CGRectMake(, , , )];
    label.textAlignment = NSTextAlignmentCenter;
    label.text          = @"学挖掘机哪家强?";
    label.textColor     = [UIColor grayColor];
    [self.view addSubview:label];

    button                         = [[ChooseOnlyButton alloc] initWithFrame:CGRectMake(, , , )];
    button.buttonHeight            = .f;
    button.gapFromLeft             = .f;
    button.gapFromVerticalButton   = .f;
    button.gapFromHorizontalButton = .f;
    button.buttonTitleFont         = [UIFont systemFontOfSize:.f];
    button.titles                  = @[@"A. 蓝翔",
                                       @"B. blueShit",
                                       @"C. YouXianMing",
                                       @"D. 不知道"];
    button.delegate                = self;

    [self.view addSubview:button];

    // 设置完所有参数后创建出控件
    [button resetSizeAndCreateButtons];
}

#pragma mark - 代理
- (void)chooseButtonTitle:(NSString *)title {
    NSLog(@"%@", title);
    NSLog(@"%@", button.selectedTitle);
}

@end

以下是需要注意的地方:

超高的可定制性