iOS开发自定义时间选取器
jopen
9年前
自定义时间选取器
今天我们做一个时间选取器,很简单,效果如下:
我们自定义一个LGDatePickerView,在LGDatePickerView里面实现。
背景半透明
背景是半透明的,点击的灰色背景的时候,时间选取器消失。在LGDatePickerView初始化方法里,代码如下:
- (id)init { self = [super init]; if (self) { //背景半透明,绑定取消方法 UIControl *control = [[UIControl alloc] initWithFrame:SCREEN_BOUNDS]; control.backgroundColor = [UIColor colorWithRed:0.0/255.0 green:0.0/255.0 blue:0.0/255.0 alpha:0.5f]; [self addSubview:control]; [control addTarget:self action:@selector(actionCancel:) forControlEvents:UIControlEventTouchUpInside]; } return self; }
绑定的actionCancel方法:
- (void)actionCancel:(id)sender { [self removeFromSuperview]; }
确定取消按钮
看到上面的确定取消按钮,你会怎么做,写一个UIView上面放两个UIButton。这样做也是可以实现的。我们还可以用UIToolbar。在LGDatePickerView初始化方法里加上下面这段代码:
// Toolbar UIToolbar *toolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, SCREEN.height - 250, SCREEN.width, 50)]; toolbar.autoresizingMask = UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleWidth; UIBarButtonItem *itemCancelDone = [[UIBarButtonItem alloc] initWithTitle:@"确定" style:UIBarButtonItemStylePlain target:self action:@selector(actionConfirm:)]; UIBarButtonItem *itemCancel = [[UIBarButtonItem alloc] initWithTitle:@"取消" style:UIBarButtonItemStylePlain target:self action:@selector(actionCancel:)]; UIBarButtonItem *space = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil]; [toolbar setItems:[NSArray arrayWithObjects:itemCancel,space,itemCancelDone, nil]]; [control addSubview:toolbar];
actionCancel上面已经实现了。下面实现actionConfirm方法。它有什么作用呢?
- 点击的时候获取到时间,然后通过代理代理出去
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时间选取器消失
- (void)actionConfirm:(id)sender { if ([self.delegate respondsToSelector:@selector(datePickerView:didSelectTime:)]) { [self.delegate datePickerView:self didSelectTime:self.datePicker.date]; } [self removeFromSuperview]; }
代理方法
在LGDatePickerView.h
@protocol LGDatePickerViewDelegate <NSObject> - (void)datePickerView:(LGDatePickerView *)datepicker didSelectTime:(NSDate *)time; @end
创建UIDatePicker
在LGDatePickerView.h定义一个全局变量:
@property (nonatomic, strong) UIDatePicker *datePicker;
在LGDatePickerView初始化方法里加上下面这段代码:
UIDatePicker *datePicker = [[UIDatePicker alloc] init]; datePicker.backgroundColor = [UIColor whiteColor]; datePicker.datePickerMode = UIDatePickerModeCountDownTimer; datePicker.date = [NSDate date]; datePicker.frame = CGRectMake(0, SCREEN.height - 200, SCREEN.width, 220); [control addSubview:datePicker]; self.datePicker = datePicker;
使用LGDatePickerView
使用起来很简单,创建一下,然后加载self.view上面即可:
LGDatePickerView *datePicker = [[LGDatePickerView alloc] init]; datePicker.delegate = self; datePicker.datePicker.date = [NSDate date]; datePicker.frame = self.view.bounds; [self.view addSubview:datePicker];
以上就实现了iOS开发自定义时间选取器,代码不难,有什么问题,欢迎提问哈。
Posted by 李刚
来自:http://www.superqq.com/blog/2015/07/06/ioskai-fa-zi-ding-yi-shi-jian-xuan-qu-qi/