launchscreen - ¿Cómo puedo cambiar la fuente de texto en UIPickerView en iOS 7?

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Question

Pude cambiar el color de mi fuente, pero también necesito cambiar el tamaño de la fuente, ¿cómo puedo lograr eso? Aquí está mi código para cambiar el color,

 - (NSAttributedString *)pickerView:(UIPickerView *)pickerView attributedTitleForRow:(NSInteger)row forComponent:(NSInteger)component {
NSString *title = _currencyName[row];
NSAttributedString *attString = [[NSAttributedString alloc] initWithString:title attributes:@{NSForegroundColorAttributeName:[UIColor whiteColor]}];
return attString;
}

ACTUALIZACIÓN: esto no funcionó:

 NSAttributedString *attString = [[NSAttributedString alloc] initWithString:title attributes:@{NSForegroundColorAttributeName:[UIColor whiteColor], NSFontAttributeName: [UIFont fontWithName:@"HelveticaNeue-Light" size:40]}];

Answer 1

Creo que debe agregar NSFontAttributeName en su lista de attributes y puede usar el método de clase fontWithName:size: de UIFont

Answer 2

pickerView:viewForRow:forComponent:reusingView: implementar pickerView:viewForRow:forComponent:reusingView: method en delegado del selector

- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view{
UILabel* lbl = (UILabel*)view;
// Customise Font
if (lbl == nil) {
//label size
CGRect frame = CGRectMake(0.0, 0.0, 70, 30);
lbl = [[UILabel alloc] initWithFrame:frame];
[lbl setTextAlignment:UITextAlignmentLeft];
[lbl setBackgroundColor:[UIColor clearColor]];
//here you can play with fonts
[lbl setFont:[UIFont fontWithName:@"Times New Roman" size:14.0]];
}
//picker view array is the datasource
[lbl setText:[pickerViewArray objectAtIndex:row]];
return lbl;
}

Answer 3

- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view
{
UILabel* tView = (UILabel*)view;
if (!tView)
{
tView = [[UILabel alloc] init];
[tView setFont:[UIFont fontWithName:@"Helvetica" size:14]];
//[tView setTextAlignment:UITextAlignmentLeft];
tView.numberOfLines=3;
}
// Fill the label text here
tView.text=[wishvalues objectAtIndex:row];
return tView;
}

Answer 4

Aquí está la versión Swift probada en iOS8:

Actualice en Swift para iOS8, puede agregar esto a su delegado:

func pickerView(pickerView: UIPickerView, viewForRow row: Int, forComponent component: Int, reusingView view: UIView!) -> UIView {
var pickerLabel = view as? UILabel;
if (pickerLabel == nil)
{
pickerLabel = UILabel()
pickerLabel?.font = UIFont(name: "Montserrat", size: 16)
pickerLabel?.textAlignment = NSTextAlignment.Center
}
pickerLabel?.text = fetchLabelForRowNumber(row)
return pickerLabel!;
}

Answer 5

Gracias por @Richard Bown

¿Esta sería una mejor respuesta para Swift?

func pickerView(pickerView: UIPickerView, viewForRow row: Int, forComponent component: Int, reusingView view: UIView?) -> UIView {
if let titleLabel = view as? UILabel {
titleLabel.text = "Your Text"
return titleLabel
} else {
let titleLabel = UILabel()
titleLabel.font = UIFont.boldSystemFontOfSize(16)//Font you want here
titleLabel.textAlignment = NSTextAlignment.Center
titleLabel.text = "Your Text"
return titleLabel
}
}

Answer 6

Puede usar el siguiente código para establecer la fuente de pickerview ..

- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view {
UILabel *tView = (UILabel *)view;
if (!tView){
tView = [[UILabel alloc] init];
[tView setFont:[UIFont .....]];//set font
// Setup label properties - frame, font, colors etc
...
}
// Fill the label text here
...
return tView;
}

Answer 7

let textLabel = view as? UILabel ?? {
let label = UILabel()
label.font = UIFont.boldSystemFontOfSize(16)
label.textAlignment = .Center
return label
}()
textLabel.text = Array(componentDataSources[component].keys)[row]
return textLabel

Answer 8

Actualizado para Swift 4:

public func pickerView(_ pickerView: UIPickerView, viewForRow row: Int, forComponent component: Int, reusing view: UIView?) -> UIView {
let label = view as? UILabel ?? UILabel()
label.font = .systemFont(ofSize: 16)
label.textColor = .white
label.textAlignment = .center
label.text = text(for: row, for: component)
return label
}