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 == 0) { return; } // 没有设置左边距则默认值为5.f if (_gapFromLeft == 0) { _gapFromLeft = 5.f; } // 没有设置水平按钮间距则默认值为5.f if (_gapFromHorizontalButton == 0) { _gapFromHorizontalButton = 5.f; } // 没有设置垂直按钮间距则默认值为5.f if (_gapFromVerticalButton == 0) { _gapFromVerticalButton = 5.f; } // 没有设置按钮高度则按钮默认高度为20.f if (_buttonHeight == 0) { _buttonHeight = 20.f; } // 获取frame宽度 CGFloat frameWidth = self.bounds.size.width; // 计算出按钮宽度 CGFloat buttonWidth = (frameWidth - _gapFromLeft*2 - _gapFromHorizontalButton)/2.f; // 动态创建出按钮 for (int i = 0; i < _titles.count; i++) { UIButton *button = [[UIButton alloc] initWithFrame: CGRectMake(_gapFromLeft + (buttonWidth + _gapFromHorizontalButton)*(i%2), (i/2)*(_buttonHeight + _gapFromVerticalButton), buttonWidth, _buttonHeight)]; // 设置按钮圆角 button.layer.cornerRadius = _buttonHeight/2.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 - 1)/2 + 1) + _gapFromVerticalButton*((_titles.count - 1)/2); CGRect rect = self.frame; rect.size.height = selfViewHeight; self.frame = rect; } - (CGRect)calculateFrame { // 没有元素则退出 if (_titles.count == 0) { return CGRectZero; } // 没有设置左边距则默认值为5.f if (_gapFromLeft == 0) { _gapFromLeft = 5.f; } // 没有设置水平按钮间距则默认值为5.f if (_gapFromHorizontalButton == 0) { _gapFromHorizontalButton = 5.f; } // 没有设置垂直按钮间距则默认值为5.f if (_gapFromVerticalButton == 0) { _gapFromVerticalButton = 5.f; } // 没有设置按钮高度则按钮默认高度为20.f if (_buttonHeight == 0) { _buttonHeight = 20.f; } // 根据控件的一些参数计算出高度 CGFloat selfViewHeight = _buttonHeight*((_titles.count - 1)/2 + 1) + _gapFromVerticalButton*((_titles.count - 1)/2); 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:1] 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:1].CGColor; button.layer.borderWidth = 1.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:1] forState:UIControlStateNormal]; } if (_selectedButtonBackgroundColor) { button.backgroundColor = _selectedButtonBackgroundColor; } else { button.backgroundColor = [UIColor colorWithRed:0.055 green:0.365 blue:0.663 alpha:1]; } button.layer.borderColor = [UIColor colorWithRed:0.055 green:0.365 blue:0.663 alpha:1].CGColor; button.layer.borderWidth = 1.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(0, 50, 320, 30)]; 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(0, 100, 320, 400)]; button.buttonHeight = 25.f; button.gapFromLeft = 10.f; button.gapFromVerticalButton = 20.f; button.gapFromHorizontalButton = 10.f; button.buttonTitleFont = [UIFont systemFontOfSize:16.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
