- (void)selectRow:(NSInteger)row inComponent:(NSInteger)component animated:(BOOL)animated;
[pickerView selectRow:2 inComponent:0 animated:NO];
选中的是第 0 个组件,第 3 行;
- (void)selectRow:(NSInteger)row inComponent:(NSInteger)component animated:(BOOL)animated;
[pickerView selectRow:2 inComponent:0 animated:NO];
选中的是第 0 个组件,第 3 行;