UIPickerView內容居中顯示,設定初始預設值
阿新 • • 發佈：2018-12-23
系統預設的是內容居左顯示的，有時會覺得不太好看，可以實現代理方法。
- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view
{
UILabel *label = [[[UILabel alloc] initWithFrame:CGRectMake(12.0f, 0.0f, [pickerView rowSizeForComponent:component].width-12, [pickerView rowSizeForComponent:component].height)] autorelease];
[label setText:[pickerData objectAtIndex:row]];
label.backgroundColor = [UIColor clearColor];
[label setTextAlignment:UITextAlignmentCenter];
return label;
}
設定初始預設值
[pickerView selectRow:3 inComponent:0 animated:NO];