ios：在 uitextfield 中显示数组值？

ios : display the array value in uitextfield?

在文本字段中显示键值。

这就是我获取数据的方式：

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-(void)textFieldDidBeginEditing:(UITextField *)textField{

if (txtviolation.editing == YES)
{
pickerV = [[UIPickerView alloc]init];
pickerV.dataSource = self;[![enter image description here][1]][1]
pickerV.delegate = self;
pickerV.showsSelectionIndicator = YES;
UIBarButtonItem *doneButton = [[UIBarButtonItem alloc] initWithTitle:@”Done” style:UIBarButtonItemStyleDone target:self action:@selector(done)];

[[UIBarButtonItem appearance] setTintColor:[UIColor whiteColor]];
UIToolbar *toolBar = [[UIToolbar alloc]initWithFrame:CGRectMake(0, self.view.frame.size.height-pickerV.frame.size.height-50, 320, 50)];
[toolBar setBarStyle:UIBarStyleBlackOpaque];
NSArray *toolbarItems = [NSArray arrayWithObjects:doneButton, nil];
[toolBar setItems:toolbarItems];
txtviolation.inputView = pickerV;
txtviolation.inputAccessoryView = toolBar;
flag=1;
}
else if (txttype.editing == YES)
{

pickerV = [[UIPickerView alloc]init];
pickerV.dataSource = self;
pickerV.delegate = self;
pickerV.showsSelectionIndicator = YES;
UIBarButtonItem *doneButton = [[UIBarButtonItem alloc] initWithTitle:@”Done” style:UIBarButtonItemStyleDone target:self action:@selector(done)];

[[UIBarButtonItem appearance] setTintColor:[UIColor whiteColor]];
UIToolbar *toolBar = [[UIToolbar alloc]initWithFrame:CGRectMake(0, self.view.frame.size.height-pickerV.frame.size.height-50, 320, 50)];
[toolBar setBarStyle:UIBarStyleBlackOpaque];
NSArray *toolbarItems = [NSArray arrayWithObjects:
doneButton, nil];
[toolBar setItems:toolbarItems];
txttype.inputView = pickerV;
txttype.inputAccessoryView = toolBar;
flag=2;
}
}

这是显示数据的方式：

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-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
{
if (flag==1)
{
return ViolationA.count;
}
else if (flag==2)
{
return VTypeA.count;
}
return 0;
}

– (NSString*)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
{
if (flag==1)
{
return [NSString stringWithFormat:@”%@”, [ViolationA objectAtIndex:row]];
}
else if (flag==2)
{
return [NSString stringWithFormat:@”%@”, [VTypeA objectAtIndex:row]];
}

return 0;
}

-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
if (flag==1)
{
// [txtviolation setText:[[ViolationA objectAtIndex:row] forKeyPath:@”violation_name”]];

txtviolation.text =[NSString stringWithFormat:@”%@”, [ViolationA objectAtIndex:row]];
}
else if (flag==2)
{
txttype.text = [NSString stringWithFormat:@”%@”, [VTypeA objectAtIndex:row]];

}
}

我无法绑定：

点击文本框然后打开 uipicker 视图但不显示标题名称只显示 ‘{‘ 符号。

然后滚动它以设置数组键和值的值，但我只设置值。

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uitextfield setvalue:
{ “violation_name” =”Street Light”; }

and

uipickerview display:
{
{
{

then to select any value to set in text field.

uipickerview 执行选择文本字段不使用任何按钮

相关讨论

你的编码很好，我认为你的数组包含另一个索引，所以试试 txtviolation.text =[[ViolationA objectAtIndex:row]objectatindex:0];，实际上我们不知道你的 ViolationA 包含什么
@Nilesh：您的代码根本不干净，不必要重复相同的代码…请通过此链接 stackoverflow.com/a/11612702/1570609

@property(strong, nonatomic) NSMutableArray *ViolationA; @property(strong, nonatomic) NSMutableArray *VTypeA;

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-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
{
return 1;
}

-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
{
if (flag==0)
{
return ViolationA.count;
}
else if (flag==1)
{
return VTypeA.count;
}
return 0;
}

– (NSString*)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
{
if (flag==0)
{
return [[ViolationA objectAtIndex:row] valueForKey:@”violation_name”];
}
else if (flag==1)
{
return [[VTypeA objectAtIndex:row] valueForKey:@”priorirty_name”];
//[NSString stringWithFormat:@”%@”, [VTypeA objectAtIndex:row]];
//violation_name
}
return 0;
}

-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
if (flag==0)
{
txtviolation.text =[[ViolationA objectAtIndex:row] valueForKey:@”violation_name”];
//[NSString stringWithFormat:@”%@”,[ViolationA objectAtIndex:row]];
}
else if (flag==1)
{
txttype.text = [[VTypeA objectAtIndex:row] valueForKey:@”priorirty_name”];

}
}

-(void)textFieldDidBeginEditing:(UITextField *)textField
{
pickerV = [[UIPickerView alloc]init];
pickerV.dataSource = self;
pickerV.delegate = self;
pickerV.showsSelectionIndicator = YES;
UIBarButtonItem *doneButton = [[UIBarButtonItem alloc] initWithTitle:@”Done” style:UIBarButtonItemStyleDone target:self action:@selector(done)];
[[UIBarButtonItem appearance] setTintColor:[UIColor whiteColor]];
UIToolbar *toolBar = [[UIToolbar alloc]initWithFrame:CGRectMake(0, self.view.frame.size.height-pickerV.frame.size.height-50, 320, 50)];
[toolBar setBarStyle:UIBarStyleBlackOpaque];
NSArray *toolbarItems = [NSArray arrayWithObjects:doneButton, nil];
[toolBar setItems:toolbarItems];

if (txtviolation.editing == YES)
{
txtviolation.inputView = pickerV;
txtviolation.inputAccessoryView = toolBar;
flag=0;
}
else if (txttype.editing == YES)
{
txttype.inputView = pickerV;
txttype.inputAccessoryView = toolBar;
flag=1;
}
}

来源：https://www.codenong.com/31825707/

ios : display the array value in uitextfield?

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