我编写了以下代码,出于某种原因 pickerView 显示 ??????而不是它应该显示的数组。
数组已经在header中定义,dataSource已经设置到view controller。
- (void)viewDidLoad
{
[super viewDidLoad];
arrayContext = [[NSMutableArray alloc] init];
[arrayContext addObject:@"is"];
[arrayContext addObject:@"wants"];
[arrayContext addObject:@"loves"];
[arrayContext addObject:@"hates"];
[arrayContext addObject:@"enjoyed"];
[arrayContext addObject:@"liked"];
[arrayContext addObject:@"likes"];
[pickerView selectRow:1 inComponent:0 animated:NO];
}
- (void)viewDidUnload
{
[textField release];
textField = nil;
[pickerView release];
pickerView = nil;
[arrayContext release];
arrayContext = nil;
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView {
return 1;
}
-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
NSMutableDictionary *plistDict = [NSMutableDictionary dictionaryWithContentsOfFile:@"/var/mobile/Library/Preferences/com.ScotDev.QuickComPrefs.plist"];
NSString *chosenContext = [NSString stringWithFormat:@"%@ ", [arrayContext objectAtIndex:row]];
[plistDict setValue:chosenContext forKey:@"Context"];
}
- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component {
return [arrayContext count];
}
- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component {
return [arrayContext objectAtIndex:row];
}
最佳答案
- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component;
是 delegate
方法而不是 dataSource
方法。为了使您的代码正常工作,两者都必须连接到此 View Controller 。
关于ios - 奇怪的字符串文本出现在 UIPickerView 内容中,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/9691470/