Objective c UIPickerView-如何检测以编程方式更改的值?
Objective c UIPickerView-如何检测以编程方式更改的值?,objective-c,uipickerview,onchange,Objective C,Uipickerview,Onchange,-(void)pickerView:(UIPickerView*)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component当值更改时,委托不起作用 i、 e [pickerView selectRow:5不完整:2动画:是]; 如何检测UIPickerView是否设置了该值?请尝试以下操作:- //设置委托和数据源。不要期望picker视图起作用 //如果不设置,则正确 [pickerView set
-(void)pickerView:(UIPickerView*)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
当值更改时,委托不起作用
i、 e
[pickerView selectRow:5不完整:2动画:是];
如何检测UIPickerView
是否设置了该值?请尝试以下操作:-
//设置委托和数据源。不要期望picker视图起作用
//如果不设置,则正确
[pickerView setDataSource: self];
[pickerView setDelegate: self]
首先,让选择指示器(该行位于
//选取器视图,突出显示您的选择)
pickerView.showsSelectionIndicator = YES;
//允许我们在pickerView中预选第五个选项
[pickerView selectRow:5 inComponent:0 animated:YES];