如何自定义UIPickerView中文本的大小和文本靠左或靠右显示？

需要重写UIPickerView中的

1 -(UIView*)pickerView:(UIPickerView*)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view

方法

示例代码如下

 1 //自定义uipickerview中的文字大小
 2 -(UIView*)pickerView:(UIPickerView*)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view
 3 {
 4     UILabel *myView=nil;
 5     
 6     myView=[[UILabel alloc]initWithFrame:CGRectMake(0.0, 0.0, 264, 30)];
 7     myView.textAlignment=NSTextAlignmentRight;
 8     
 9     if (pickerView==self.SourcePicker) {
10         myView.text=[_SourcePickerArray objectAtIndex:row];
11         
12     }else{
13         myView.text=[_RoomPickerArray objectAtIndex:row];
14     }
15     myView.font=[UIFont systemFontOfSize:17];
16     myView.textColor=[UIColor blackColor];
17     myView.backgroundColor=[UIColor clearColor];
18     return  myView;
19     
20 }

另外注意，ios6之前调整文本靠左或者靠右对齐的代码为

1 mylabel.textAlignment= UITextAlignmentCenter;

在ios7以上版本需要改为

1 mylabel.textAlignment=NSTextAlignmentCenter;