Iphone:拆分一个以逗号分隔的字符串,并在pickerview的行中打印每个字符串
我得到了一个字符串作为Iphone:拆分一个以逗号分隔的字符串,并在pickerview的行中打印每个字符串,iphone,objective-c,ios,uipickerview,Iphone,Objective C,Ios,Uipickerview,我得到了一个字符串作为轻度、中度、热。我用逗号作为分隔符拆分了字符串。我还需要在pickerView中打印它。 我使用了以下代码并成功地将列表计数设置为3 NSString *spList=[mdict objectForKey:@"spicinesstype"]; NSArray *list = [spList componentsSeparatedByString:@","]; NSLog(@"List count:%d",[list count]); ret
轻度、中度、热。我用逗号作为分隔符拆分了字符串。我还需要在pickerView中打印它。
我使用了以下代码并成功地将列表计数设置为3
NSString *spList=[mdict objectForKey:@"spicinesstype"];
NSArray *list = [spList componentsSeparatedByString:@","];
NSLog(@"List count:%d",[list count]);
return [list count];
但是我如何在pickerview中显示所有3个项目呢?您应该将类设置为picker视图的委托,然后为您的picker实现这3个委托方法
- (NSInteger)pickerView:(UIPickerView *)thePickerView numberOfRowsInComponent:(NSInteger)component {
return [array count];
}
- (NSString *)pickerView:(UIPickerView *)thePickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component {
return [array objectAtIndex:row];
}
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)thePickerView {
return 1;
}
首先,您需要通过将UIPickerViewDeleteGate和UIPickerViewDataSource放在视图控制器头文件的@interface行的末尾来实现它们
如下所示:@interface MyViewController:UIViewController
接下来,需要将视图控制器设置为选择器视图的委托和数据源。您可以通过添加以下行,在视图控制器的-(void)viewDidLoad
方法中执行此操作:
myPickerView.delegate = self;
myPickerView.dataSource = self;
或者,如果您正在使用Interface Builder,也可以将其链接到Interface Builder中
然后,需要在视图控制器源文件中实现这些委托方法
(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView;
{
return 1;
}
- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
// whatever you want to happen when a row is selected.
}
- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component;
{
return [list count];
}
- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component;
{
return [list objectAtIndex:row];
}