我想在我的应用程序中使用https://www.cocoacontrols.com/controls/radiobutton(可可控制单选按钮)实现单选按钮 . 我希望默认情况下应始终选择其中一个 . 我该怎样才能实现这个目标 .
我的单选按钮代码如下:
RadioButton *radioButtonForDay = [[RadioButton alloc] initWithGroupId:@"first group" index:0 ];
RadioButton *radioButtonForWeek = [[RadioButton alloc] initWithGroupId:@"first group" index:1 ];
RadioButton *radioButtonForMonth = [[RadioButton alloc] initWithGroupId:@"first group" index:2 ];
radioButtonForDay.frame = CGRectMake(40,65,22,28);
radioButtonForWeek.frame = CGRectMake(130,65,22,28);
radioButtonForMonth.frame = CGRectMake(195,65,22,28);
[self.view addSubview:radioButtonForDay];
[self.view addSubview:radioButtonForWeek];
[self.view addSubview:radioButtonForMonth];
[RadioButton addObserverForGroupId:@"first group" observer:self];
RadioButton.m
`
import“RadioButton.h”
@interface RadioButton() - (void)defaultInit; - (无效)otherButtonSelected:(ID)发送者; - (无效)handleButtonTap:(ID)发送者; @结束
@implementation RadioButton
@synthesize groupId = _groupId; @synthesize index = _index;
static const NSUInteger kRadioButtonWidth = 22; static const NSUInteger kRadioButtonHeight = 22;
static NSMutableArray * rb_instances = nil; static NSMutableDictionary * rb_observers = nil;
pragma mark - 观察者
(void)addObserverForGroupId:(NSString *)groupId observer:(id)observer {if(!rb_observers){rb_observers = [[NSMutableDictionary alloc] init]; }
if ([groupId length] > 0 && observer) {
[rb_observers setObject:observer forKey:groupId];
// Make it weak reference
//[observer release];
}
}
pragma mark - 管理实例
(void)registerInstance:(RadioButton *)radioButton {if(!rb_instances){rb_instances = [[NSMutableArray alloc] init]; }
[rb_instances addObject:radioButton];
// Make it weak reference
//[radioButton release];
}
pragma mark - 类级别处理程序
(空隙)buttonSelected:(单选按钮*)RADIOBUTTON {
// Notify observers
if (rb_observers) {
id observer= [rb_observers objectForKey:radioButton.groupId];
if(observer && [observer respondsToSelector:@selector(radioButtonSelectedAtIndex:inGroup:)]){
[observer radioButtonSelectedAtIndex:radioButton.index inGroup:radioButton.groupId];
}
}
// Unselect the other radio buttons
if (rb_instances) {
for (int i = 0; i < [rb_instances count]; i++) {
RadioButton *button = [rb_instances objectAtIndex:i];
if (![button isEqual:radioButton] && [button.groupId isEqualToString:radioButton.groupId]) {
[button otherButtonSelected:radioButton];
}
}
}
}
pragma mark - 对象生命周期
- (id)initWithGroupId:(NSString *)groupId index:(NSUInteger)index {self = [super init];
if (self) {
_groupId = groupId;
_index = index;
// _selected = selected;
[self defaultInit];
}
return self;
}
- (void)dealloc {// [_ groupId release]; // [_button release]; // [super dealloc]; }
pragma mark - 点击处理
-
(void)handleButtonTap:(id)sender {[_button setSelected:YES]; [RadioButton buttonSelected:self]; }
-
(void)otherButtonSelected:(id)sender {//当选择其他单选按钮实例时调用(_button.selected){[_button setSelected:NO];
}}
pragma mark - RadioButton init
- (void)defaultInit {//设置容器视图self.frame = CGRectMake(0,0,kRadioButtonWidth,kRadioButtonHeight);
// Customize UIButton
_button = [UIButton buttonWithType:UIButtonTypeCustom];
_button.frame = CGRectMake(0, 0,kRadioButtonWidth, kRadioButtonHeight);
_button.adjustsImageWhenHighlighted = NO;
[_button setImage:[UIImage imageNamed:@"RadioButton-Unselected"] forState:UIControlStateNormal];
[_button setImage:[UIImage imageNamed:@"RadioButton-Selected"] forState:UIControlStateSelected];
[_button addTarget:self action:@selector(handleButtonTap:) forControlEvents:UIControlEventTouchUpInside];
[self addSubview:_button];
[RadioButton registerInstance:self];
}
@end`
2 回答
最初将所选图像设置为任何按钮 .
而根据你的代码只需将
handleButtonTap
方法放在RadioButton.h
中并在
RadioButtonViewController.m
中访问您要选择的按钮它用于第二个按钮(即RadioButton * rb2)
试试这个 :
用于默认选择
当你去下一个视图只是检查条件....