iOS接口回調模式

       首先聲明我是一個Android開發工程師，由於公司項目需要，我暫時轉變成爲了iOS開發，今天下午在做項目時，遇到的iOS接口回調，頗有些心得，分享給大家～～～

         廢話不多說，直接上代碼：

在AlertDatePicker.h文件中

@class AlertDatePicker;

@protocol DatePickerViewDelegate <NSObject>      

@required
- (void)datePickerView:(AlertDatePicker *)pickerView didSelecteDate:(NSString *)string andUILabel:(NSString *)uiLabelString;

@optional
- (void)datePickerDidCancelSelect:(AlertDatePicker *)pickerView;

@end

@interface AlertDatePicker:TenementAlertView

- (instancetype)initWithDelegate:(id)delegate initTitle:(NSString *)title maxDate:(NSString *)maxDate minDate:(NSString *)minDate;

@end

@protocol是定義接口名稱

@required在實現接口類中必須要實現的方法

@optional在實現接口類中必須要實現的方法

在AlertDatePicker.m文件中

-(void)confirmButtonPressed:(id)sender{
    [super confirmButtonPressed:sender];
    if ([self.delegate respondsToSelector:@selector(datePickerView:didSelecteDate:andUILabel:)]) {
         NSString *dateString=[DateUtil stringFromDay:_datePicker.date];
        [self.delegate datePickerView:self didSelecteDate:dateString andUILabel:dateString];
    }
}

-(void)cancelButtonPressed:(id)sender{
    [super cancelButtonPressed:sender];
    if ([self.delegate respondsToSelector:@selector(datePickerDidCancelSelect:)]) {
        [self.delegate datePickerDidCancelSelect:self];
    }

}

<span style="background-color: rgb(255, 255, 255);">首先在文件中查看接口類中有沒有該方法[self.delegate respondsToSelector:@selector(datePickerView:didSelecteDate:andUILabel:)]</span>

接口被調用

[self.delegate datePickerView:self didSelecteDate:dateString andUILabel:dateString];

實現接口的類中：

@interface ContractSignedViewController ()<DatePickerViewDelegate>


//綁定接口
 AlertDatePicker *alertDatePicker=[[AlertDatePicker alloc]initWithDelegate:self initTitle:@"選擇入住日" maxDate:[DateUtil stringFromDay:[NSDate dateWithTimeInterval:7*24*60*60 sinceDate:[DateUtil dayFromString:_enterDate.text]]] minDate:_enterDate.text];
    [alertDatePicker show:YES];


#pragma mark  DatePickerViewDelegate  實現接口
-(void)datePickerView:(AlertDatePicker *)pickerView didSelecteDate:(NSString *)string andUILabel:(NSString *)uiLabelString{
    NSLog(@"%@,%@",string,uiLabelString);
}

-(void)datePickerDidCancelSelect:(AlertDatePicker *)pickerView{
    //點擊“取消“暫時不做處理
}

分享的比較粗糙，還在慢慢學習～～～