iOS-填充静态UIPickerView

我有一份个人资料表，作为

iOS

应用程序注册过程的一部分

---

我想使用“下拉”菜单来显示诸如性别、标题、，DOB等。每个选择器的数据都是静态的-我将使用UIPickerView来实现-但我的问题是-我是否需要创建数组和数据委托来填充每个选择器，还是有一种更简单的方法来应用静态数据？

没有委托你能做到吗？没有

没有阵列你能做到吗？是的，但你不应该

下面是一个没有数组的示例（来自）

但是，您真的应该只使用一个数组，这样可以更容易地读取和维护一个数组。如果要添加附加值，只需将其添加到数组中即可。不要在多个点中更新，只需向数组中添加另一个值即可。而且，更容易理解

@implementation PickerViewController
.
.
- (void)viewDidLoad {
      [super viewDidLoad];
      _myArray = @[@"Row 1", @"Row 2", @"Row 3",];
}

- (void)pickerView:(UIPickerView *)pickerView didSelectRow: (NSInteger)row inComponent:(NSInteger)component {
    // Handle the selection
}

// tell the picker how many rows are available for a given component
- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component {
    NSUInteger numRows = 3;

    return _myArray.count;
}

// tell the picker how many components it will have
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView {
 return 1;
}

// tell the picker the title for a given component
- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component {
    NSString *title;

    title = myArray[row];

    return title;
}

// tell the picker the width of each row for a given component
- (CGFloat)pickerView:(UIPickerView *)pickerView widthForComponent:(NSInteger)component {
 int sectionWidth = 300;

 return sectionWidth;
}

如果有多个选择器，则只需使用多个数组并检查每个PickerView，以查看在将PickerView传递到列出的每个函数中后所使用的是哪一个

@implementation PickerViewController
.
.
- (void)viewDidLoad {
      [super viewDidLoad];
      _myArray1 = @[@"Row 1", @"Row 2", @"Row 3",];
      _myArray2 = @[@"Row 1-2", @"Row 2-2", @"Row 3-2", @"Row 4-2"];      

      UIPickerView pickerView1 = [[UIPickerView alloc] init];
      UIPickerView pickerView2 = [[UIPickerView alloc] init];      
}

- (void)pickerView:(UIPickerView *)pickerView didSelectRow: (NSInteger)row inComponent:(NSInteger)component {
    // Handle the selection
    if (pickerView == pickerView1)
    {
        // First Picker
    }
    else if (pickerView == pickerView2)
    {
        // First Picker    
    }
}

// tell the picker how many rows are available for a given component
- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component {
    if (pickerView == pickerView1)
    {
        // First Picker
         return _myArray1.count;
    }
    else if (pickerView == pickerView2)
    {
        // Second Picker    
        return _myArray2.count;
    }    

    // A third picker passed in somehow
    return 0;
}

// tell the picker how many components it will have
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView {
    if (pickerView == pickerView1)
    {
        // First Picker
         return 1;
    }
    else if (pickerView == pickerView2)
    {
        // Second Picker    
        return 1;
    }    

    // A third picker passed in somehow
    return 0;
}

// tell the picker the title for a given component
- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component {
    NSString *title;

    if (pickerView == pickerView1)
    {
        // First Picker
         title = myArray1[row];
    }
    else if (pickerView == pickerView2)
    {
        // Second Picker    
        rtitle = myArray2[row];
    }    

    return title;
}

// tell the picker the width of each row for a given component
- (CGFloat)pickerView:(UIPickerView *)pickerView widthForComponent:(NSInteger)component {
    if (pickerView == pickerView1)
    {
        // First Picker
         return 300;
    }
    else if (pickerView == pickerView2)
    {
        // Second Picker    
        return 400;
    }    

    // A third picker passed in somehow
    return 0;
}

---

如果你在应用程序中多次需要它，你可以创建一个自定义类来实现UIPickerViewDataSource和UIPickerViewDelegate，该类将数组作为初始参数，并处理其余的internallycool cheers@ansible-我能不能在同一页面中对多个UIPicker使用array方法？@Dancer-是的-在中添加了一个示例我的回答是两个选择。同样的想法也适用于多个UITableView、UITextBox。。。在iOS中。

@implementation PickerViewController
.
.
- (void)viewDidLoad {
      [super viewDidLoad];
      _myArray1 = @[@"Row 1", @"Row 2", @"Row 3",];
      _myArray2 = @[@"Row 1-2", @"Row 2-2", @"Row 3-2", @"Row 4-2"];      

      UIPickerView pickerView1 = [[UIPickerView alloc] init];
      UIPickerView pickerView2 = [[UIPickerView alloc] init];      
}

- (void)pickerView:(UIPickerView *)pickerView didSelectRow: (NSInteger)row inComponent:(NSInteger)component {
    // Handle the selection
    if (pickerView == pickerView1)
    {
        // First Picker
    }
    else if (pickerView == pickerView2)
    {
        // First Picker    
    }
}

// tell the picker how many rows are available for a given component
- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component {
    if (pickerView == pickerView1)
    {
        // First Picker
         return _myArray1.count;
    }
    else if (pickerView == pickerView2)
    {
        // Second Picker    
        return _myArray2.count;
    }    

    // A third picker passed in somehow
    return 0;
}

// tell the picker how many components it will have
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView {
    if (pickerView == pickerView1)
    {
        // First Picker
         return 1;
    }
    else if (pickerView == pickerView2)
    {
        // Second Picker    
        return 1;
    }    

    // A third picker passed in somehow
    return 0;
}

// tell the picker the title for a given component
- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component {
    NSString *title;

    if (pickerView == pickerView1)
    {
        // First Picker
         title = myArray1[row];
    }
    else if (pickerView == pickerView2)
    {
        // Second Picker    
        rtitle = myArray2[row];
    }    

    return title;
}

// tell the picker the width of each row for a given component
- (CGFloat)pickerView:(UIPickerView *)pickerView widthForComponent:(NSInteger)component {
    if (pickerView == pickerView1)
    {
        // First Picker
         return 300;
    }
    else if (pickerView == pickerView2)
    {
        // Second Picker    
        return 400;
    }    

    // A third picker passed in somehow
    return 0;
}