自定义UIPicker – 插入图片

如下图所示，我试图自定义我的select器。 我已经在我的select器上成功添加了图片，但是没有影响到其他所有的select器。我已经把我的代码也作为参考。 提前感谢，感恩节快乐。

- (void)loadView { picker1 = [[UIPickerView alloc] initWithFrame:CGRectMake(30, 200, 250, 250)]; picker1.delegate = self; picker1.dataSource = self; picker1.showsSelectionIndicator = YES; picker2 = [[UIPickerView alloc] initWithFrame:CGRectMake(390, 200, 250, 250)]; picker2.delegate = self; picker2.dataSource = self; picker2.showsSelectionIndicator = YES; picker3 = [[UIPickerView alloc] initWithFrame:CGRectMake(750, 200, 250, 250)]; picker3.delegate = self; picker3.dataSource = self; picker3.showsSelectionIndicator = YES; self.view = [[UIView alloc] initWithFrame:CGRectZero]; [self.view addSubview:picker1]; [self.view addSubview:picker2]; [self.view addSubview:picker3]; UIImage *seven = [UIImage imageNamed:@"seven.png"]; UIImage *bar = [UIImage imageNamed:@"bar.png"]; for(int i=1; i<=4; i++) { UIImageView *sevenView = [[UIImageView alloc] initWithImage:seven]; UIImageView *barView = [[UIImageView alloc] initWithImage:bar]; NSArray *imageViewArray = [[NSArray alloc] initWithObjects: sevenView,barView,nil]; NSString *fieldName = [[NSString alloc] initWithFormat:@"column%d",i]; [self setValue:imageViewArray forKey:fieldName]; } } -(UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view { NSString *arrayName = [[NSString alloc] initWithFormat:@"column%d",component+1]; NSArray *array = [self valueForKey:arrayName]; return [array objectAtIndex:row]; } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Releases the view if it doesn't have a superview // Release anything that's not essential, such as cached data } - (void)dealloc { } #pragma mark UIPickerViewDelegate methods - (NSString*)pickerView:(UIPickerView*)pv titleForRow:(NSInteger)row forComponent:(NSInteger)component { return [NSString stringWithFormat:@"%d",row]; } #pragma mark UIPickerViewDataSource methods - (NSInteger)numberOfComponentsInPickerView:(UIPickerView*)pv { return 4; } - (NSInteger)pickerView:(UIPickerView*)pv numberOfRowsInComponent:(NSInteger)component { return 2; } @end 

Answer 1

 -(UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view { NSArray *array = nil; if (pickerView == picker1) { array = [self valueForKey:@"column1"]; } else if (pickerView == picker2) { array = [self valueForKey:@"column2"]; } else if (pickerView == picker3) { array = [self valueForKey:@"column3"]; } return [array objectAtIndex:row]; }