-(UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view{
UILabel *lbl = (UILabel *)view;
if (lbl == nil) {
lbl = [[UILabel alloc]init];
//在这里设置字体相关属性
lbl.font = [UIFont systemFontOfSize:20];
lbl.textColor = [UIColor redColor];
[lbl setTextAlignment:0];
[lbl setBackgroundColor:[UIColor clearColor]];
}
//重新加载lbl的文字内容
lbl.text = [self pickerView:pickerView titleForRow:row forComponent:component];
return lbl;
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