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[互联网] IOS自定义RadioGroup
IOS自定义RadioGroup

实现与android平台上相同的RadioGroup控件
//使用是只需要实现RadioGroup代理即可完成监听事件

[1].[图片] EBF2792E-4CB0-4318-B6B8-7CBA0E1E2DE5.png 跳至 [1] [2]



[2].[代码] Objective-C 跳至 [1] [2]


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//RadioButton实现

#import <UIKit/UIKit.h>
#import <QuartzCore/QuartzCore.h>
#define RadioButton_WHeight 25
#define RadioButton_Space 5
typedef enum {
    CCRadioButtonAligmentLeft,  //图片在左方
    CCRadioButtonAligmentRight
}CCRadioButtonAligment;

@protocol  CCRadioButtonDelegate;
@interface CCRadioButton : UIControl
{
@private
    CCRadioButtonAligment _aligment;
    CGSize _textSize;
    //使用layer减少内存消耗
    CALayer *_imageLayer;
    CATextLayer *_labelLayer;
}
@property (nonatomic, strong) UIImage *image;   //图片
@property (nonatomic, strong) UIColor *textColor;  //字体颜色
@property (assign, nonatomic) id<CCRadioButtonDelegate> delegate;
@property (nonatomic, getter = isChecked, setter = setCheck:) BOOL check;
@property (nonatomic, strong) NSString *text;

- (id)initWithFrame:(CGRect)frame text:(NSString *)text aligment:(CCRadioButtonAligment)aligment isChecked:(BOOL)check;
- (void)setCheck:(BOOL)check;
@end

@protocol CCRadioButtonDelegate <NSObject>

- (void)onCheckedChanged:(CCRadioButton *)button;

@end

#import "CCRadioButton.h"
#import "CCUITool.h"

@implementation CCRadioButton

- (id)initWithFrame:(CGRect)frame text:(NSString *)text aligment:(CCRadioButtonAligment)aligment isChecked:(BOOL)check
{
    self = [super initWithFrame:frame];
    if (self) {
        self.backgroundColor = [UIColor clearColor];
        _check = check;
        _aligment = aligment;
        _text = text;
        /* 添加target */
        [self addTarget:self action:@selector(valueChanged) forControlEvents:UIControlEventTouchUpInside];
         //更具字的size 计算本控件的frame
        _textSize = [_text sizeWithFont:[CCUITool getDefaultFont:14] constrainedToSize:CGSizeMake(SCREEN_WIDTH, SCREEN_HEIGHT)];
        self.frame = CGRectMake(self.frame.origin.x, self.frame.origin.y, RadioButton_WHeight + _textSize.width + RadioButton_Space, RadioButton_WHeight > _textSize.height ? RadioButton_WHeight : _textSize.height);
    }
    return self;
}

- (void)drawRect:(CGRect)rect
{
    if (!_imageLayer && !_labelLayer) {
        _imageLayer = [CALayer layer];
        //计算_imageLayer 与_labelLayer 的frame
        _imageLayer.frame = _aligment == CCRadioButtonAligmentLeft ? CGRectMake(_textSize.width + 5, _textSize.height > RadioButton_WHeight ? (_textSize.height - RadioButton_WHeight)/2.0 : 0, RadioButton_WHeight, RadioButton_WHeight) : CGRectMake(0, _textSize.height > RadioButton_WHeight ? (_textSize.height - RadioButton_WHeight)/2.0 : 0, RadioButton_WHeight, RadioButton_WHeight);
        [self.layer addSublayer:_imageLayer];
        
        _labelLayer = [CATextLayer layer];
        _labelLayer.string = _text;
        _labelLayer.fontSize = 14;
        _labelLayer.frame = _aligment == CCRadioButtonAligmentLeft ? CGRectMake(0, _textSize.height > RadioButton_WHeight ? 0 : (RadioButton_WHeight - _textSize.height) / 2.0, _textSize.width, _textSize.height > RadioButton_WHeight ? _textSize.height : RadioButton_WHeight) : CGRectMake(RadioButton_WHeight+RadioButton_Space, (self.frame.size.height - _textSize.height)/2.0, _textSize.width, _textSize.height);
        [self.layer addSublayer:_labelLayer];
    }
    
    / *重新切换图片,字体颜色(选中为红色)*/
    _image = [UIImage imageNamed:_check ? @"radiobutton_checked" : @"radiobutton_normal"];
    _textColor = _check ? [UIColor redColor] : [CCUITool getDefaultTextColor];
    _imageLayer.contents = (id)_image.CGImage;
    _labelLayer.foregroundColor = _textColor.CGColor;
}

- (void)valueChanged
{
    if (!_check) {
        _check = !_check;
        if (_delegate && [_delegate respondsToSelector:@selector(onCheckedChanged:)]) {
            [_delegate onCheckedChanged:self];
        }
    }
}

- (void)setCheck:(BOOL)check
{
    _check = check;
    [self setNeedsDisplay];
}

@end

//RadioGroup实现
#import <UIKit/UIKit.h>
#import "CCRadioButton.h"
typedef enum {
    CCRadioGroupOrientationHorizental,  //RadioGroup水平放置
    CCRadioGroupOrientationVertical
}CCRadioGroupOrientation;

@protocol CCRadioGroupDelegate;
@interface CCRadioGroup : UIView<CCRadioButtonDelegate/*实现RadioButton代理 */>
{
@private
    NSMutableArray *_buttonArray;
    CCRadioButton *_currentButton;
}
@property (assign, nonatomic) NSUInteger checkedIndex;
@property (assign, nonatomic) id<CCRadioGroupDelegate> delegate;

- (id)initWithFrame:(CGRect)frame buttonTitle:(NSArray *)array orientation:(CCRadioGroupOrientation)orientation;
- (void)checkIndex:(NSUInteger)index;
- (CCRadioButton *)getCheckedRadioButton:(NSUInteger)checkId;

@end
#import "CCRadioGroup.h"
#import "CCUITool.h"
#import "CCRadioGroupDelegate.h"

@implementation CCRadioGroup

- (id)initWithFrame:(CGRect)frame buttonTitle:(NSArray *)array orientation:(CCRadioGroupOrientation)orientation
{
    self = [super initWithFrame:frame];
    if (self) {
        _buttonArray = [NSMutableArray array];
        CGFloat tempY = 0;
        for (int i = 0; i < array.count; i++) {
            CCRadioButton *radioButton = nil;
            switch (orientation) {
                case CCRadioGroupOrientationVertical:
                    radioButton = [[CCRadioButton alloc] initWithFrame:CGRectMake(0, tempY, 0, 0) text:[array objectAtIndex:i] aligment:CCRadioButtonAligmentRight isChecked:NO];
                    tempY += 10;
                    break;
                case CCRadioGroupOrientationHorizental:
                    radioButton = [[CCRadioButton alloc] initWithFrame:CGRectMake(i * self.frame.size.width/array.count, 0, 0, 0) text:[array objectAtIndex:i] aligment:CCRadioButtonAligmentRight isChecked:NO];
                    break;
            }
            radioButton.tag = i;
            if (i == 0) {
                _currentButton = radioButton;
            }
            radioButton.delegate = self;
            [self addSubview:radioButton];
            [_buttonArray addObject:radioButton];
        }
    }
    return self;
}

- (void)checkIndex:(NSUInteger)index
{
    _currentButton = [_buttonArray objectAtIndex:index];
    _currentButton.check = YES;
    _checkedIndex = index;
}

- (CCRadioButton *)getCheckedRadioButton:(NSUInteger)checkId
{
    return (CCRadioButton *)[_buttonArray objectAtIndex:checkId];
}

#pragma mark - CCRadioButtonDelegate
- (void)onCheckedChanged:(CCRadioButton *)button
{
    [_currentButton setCheck:NO];
    _currentButton = button;
    [_currentButton setCheck:YES];
    _checkedIndex = button.tag;
    if (_delegate && [_delegate respondsToSelector:@selector(onCheckedChanged:index:)]) {
        [_delegate onCheckedChanged:self index:button.tag];
    }
}

@end
//RadioGroup代理
#import <Foundation/Foundation.h>

@class CCRadioGroup;
@protocol CCRadioGroupDelegate <NSObject>

- (void)onCheckedChanged:(CCRadioGroup *)radioGroup index:(NSUInteger)checkId;

@end


//使用实例
NSArray *textArray = @[@"一月", @"半年", @"一年"];
    CCRadioGroup *radioGroup = [[CCRadioGroup alloc] initWithFrame:CGRectMake(5, 2, SCREEN_WIDTH - 10, DEFAULT_HEIGHTLB) buttonTitle:textArray orientation:CCRadioGroupOrientationHorizental];
    radioGroup.delegate = self;

//实现代理
- (void)onCheckedChanged:(CCRadioGroup *)radioGroup index:(NSUInteger)checkId
{
    NSLog(@"点击了 -- %@", [radioGroup getCheckedRadioButton:checkId].text);
}



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2017-11-18 23:56:22
 
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