UIPicView地區選擇器

今天公司做項目用到了選擇地址,於是便寫了一個,用的純系統方法和控件,還沒有封裝,有需要的可以自行封裝一下,先上效果圖吧
刷新任意一列每一列都可以進行刷新

下面是代碼

這是聲明的內容

#import "ViewController.h"
#define WIDTH [UIScreen mainScreen].bounds.size.width

@interface ViewController ()<UIPickerViewDelegate,UIPickerViewDataSource>

@property (nonatomic,copy)NSMutableArray * proTitleList0;
@property (nonatomic,copy)NSMutableArray * proTitleList1;
@property (nonatomic,copy)NSMutableArray * proTitleList2;
@property (nonatomic,copy)NSString * a;
@property (nonatomic,copy)NSString * b;
@property (nonatomic,copy)NSString * c;
@property (nonatomic,strong)UITextField * textField;
@property (nonatomic,strong)UIToolbar * tool;
@end

創建

- (void)viewDidLoad {
    [super viewDidLoad];
    [self creatData];
    [self creatPickView];

}

-(void)creatData{

    _proTitleList0 = [[NSMutableArray alloc]initWithObjects:@"1",@"2",@"3",@"4",@"5",nil];
    _proTitleList1 = [[NSMutableArray alloc]initWithObjects:@"a",@"b",@"c",@"d",@"e",@"f",nil];
    _proTitleList2 = [[NSMutableArray alloc]initWithObjects:@"A",@"B",@"C",@"D",@"E",@"F",@"G",nil];

}
-(void)creatPickView{

    _textField = [[UITextField alloc] initWithFrame:CGRectMake(0, 100, WIDTH, 40)];
    _textField.backgroundColor = [UIColor yellowColor];
    [self.view addSubview:_textField];


    UIPickerView * pickerView = [[UIPickerView alloc] initWithFrame:CGRectMake(0, 300, WIDTH, 250)];
    pickerView.showsSelectionIndicator = YES;
    pickerView.dataSource = self;
    pickerView.delegate = self;
    [pickerView addSubview:_tool];

    _textField.inputView = pickerView;
}

-(void)breakDataproTitleList1:(NSInteger)row{

    //刷新之前需要先將數組中的內容移除
//    [_proTitleList1 removeAllObjects];


    //重新加載數據
    for (int i = 0; i < _proTitleList1.count; i ++) {
        //此處是直接替換
        NSString * result = [NSString stringWithFormat:@"%@%d",[_proTitleList0 objectAtIndex:row],i];
        [_proTitleList1 replaceObjectAtIndex:i withObject:result];
    }


}

-(void)breakDataproTitleList2:(NSInteger)row{

    //刷新之前需要先將數組中的內容移除
    //    [_proTitleList1 removeAllObjects];


    //重新加載數據
    for (int i = 0; i < _proTitleList2.count; i ++) {
        //此處是直接替換
        NSString * result = [NSString stringWithFormat:@"%@%d",[_proTitleList1 objectAtIndex:row],i];
        [_proTitleList2 replaceObjectAtIndex:i withObject:result];
    }
}
// pickerView 列數
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView {

    return 3;
}

// pickerView 每列個數
- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component {
    if (component == 0) {

        return [_proTitleList0 count];

    }else if (component == 1){

        return [_proTitleList1 count];

    }else{

        return [_proTitleList2 count];
    }
}

// 每列寬度
- (CGFloat)pickerView:(UIPickerView *)pickerView widthForComponent:(NSInteger)component {

    if (component == 1) {
        return WIDTH/3;
    }else if(component == 0){
        return WIDTH/3;
    }else{
        return WIDTH/3;
    }
}
// 返回選中的行
- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
    if (component == 0) {

        //在此處刷新數據proTimeList
        [self breakDataproTitleList1:row];
        [pickerView reloadComponent:1];

        //這個地方時確保第二列變了第三列也變
        [self breakDataproTitleList2:[pickerView selectedRowInComponent:1]];;
        [pickerView reloadComponent:2];


    } else if(component == 1){

        [self breakDataproTitleList2:row];
        [pickerView reloadComponent:2];


    }else{



    }
    _a = [_proTitleList0 objectAtIndex:[pickerView selectedRowInComponent:0]];
    _b = [_proTitleList1 objectAtIndex:[pickerView selectedRowInComponent:1]];
    _c = [_proTitleList2 objectAtIndex:[pickerView selectedRowInComponent:2]];
    _textField.text = [NSString stringWithFormat:@"第一列%@第二列%@第三列%@",_a,_b,_c];

}

//返回當前行的內容,此處是將數組中數值添加到滾動的那個顯示欄上
-(NSString*)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
{
    if (component == 0) {
        return [_proTitleList0 objectAtIndex:row];
    } else if(component == 1){

        return [_proTitleList1 objectAtIndex:row];

    }else{
        return [_proTitleList2 objectAtIndex:row];

    }
}

-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{

    [_textField resignFirstResponder];

}