[英]Iphone:Split a string seperated by comma and print each in row of pickerview
我得到了mild,medium,hot
的字符串。我用逗號作為分隔符分割了字符串。我也需要在pickerView中打印它。
我使用以下代碼,成功將List計數為3。
NSString *spList=[mdict objectForKey:@"spicinesstype"];
NSArray *list = [spList componentsSeparatedByString:@","];
NSLog(@"List count:%d",[list count]);
return [list count];
但是我怎么能在pickerview中顯示所有3個項目
您應該將您的類設置為Picker視圖的委托,然后為您的Picker實現這3個委托方法
- (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,您需要通過將UIPickerViewDelegate和UIPickerViewDataSource放在視圖控制器的頭文件的@interface行的末尾來實現它們。
像這樣: @interface MyViewController : UIViewController <UIPickerViewDelegate, UIPickerViewDataSource>
接下來,您需要將視圖控制器設置為選擇器視圖的委托和數據源。 您可以通過添加以下行,在視圖控制器的- (void)viewDidLoad
方法中執行此操作:
myPickerView.delegate = self;
myPickerView.dataSource = self;
或者,您也可以在Interface Builder中將其鏈接起來。
然后,您需要在View Controller源文件中實現這些委托方法。
(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];
}
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.