UIPickerView自定义背景

#import <UIKit/UIKit.h>

@interface MyPicker : UIPickerView {

}

@end

--------------------------------------------------------------------------------

//
//  MyPicker.m
//  PickerSkinTest
//
//  Created by Wang WenHui on 10-5-3.
//  Copyright 2010 __MyCompanyName__. All rights reserved.
//

#import "MyPicker.h"
#import "Function.h"

@implementation MyPicker

- (id)initWithFrame:(CGRect)frame {
    if (self = [super initWithFrame:frame]) {
        // Initialization code
        
    }
    return self;
}

- (void)drawRect:(CGRect)rect {
    
    //改变最外层的背景
    UIView *v0 = [[self subviews] objectAtIndex:0 ];
    v0.backgroundColor = [Function colorWithHexString:@"#f5f5f5"];
    
    //去掉最大的框
    UIView *v8 = [[self subviews] objectAtIndex:8];
    v8.alpha = 0.0;
    
    //第一列的设置--------------------------------
    UIView *v1 = [[self subviews] objectAtIndex:1 ];
    v1.alpha = 0.6;
    UIView *v2 = [[self subviews] objectAtIndex:2 ];
    v2.alpha = 0;
    UIView *v3 = [[self subviews] objectAtIndex:3 ];
    v3.alpha = 0;
    UIView *v4 = [[self subviews] objectAtIndex:4 ];
    v4.backgroundColor = [Function colorWithHexString:@"#eae1d8"];
    UIView *v5 = [[self subviews] objectAtIndex:5 ];
    v5.alpha = 0.0;
    UIView *v6 = [[self subviews] objectAtIndex:6 ];
    v6.alpha=0.6;
    
    [self setNeedsDisplay];
    
}

@end

======================================================

如果是两列的就用下面这个

- (void)drawRect:(CGRect)rect {
    
    //改变最外层的背景
    UIView *v0 = [[self subviews] objectAtIndex:0 ];
    v0.backgroundColor = [Function colorWithHexString:@"#f5f5f5"];
    
    //去掉最大的框
    UIView *v14 = [[self subviews] objectAtIndex:14];
    v14.alpha = 0.0;
    
    //第一列的设置--------------------------------
    UIView *v1 = [[self subviews] objectAtIndex:1 ];
    v1.alpha = 0.6;
    UIView *v2 = [[self subviews] objectAtIndex:2 ];
    v2.alpha = 0;
    UIView *v3 = [[self subviews] objectAtIndex:3 ];
    v3.alpha = 0;
    UIView *v4 = [[self subviews] objectAtIndex:4 ];
    v4.backgroundColor = [Function colorWithHexString:@"#eae1d8"];
    UIView *v5 = [[self subviews] objectAtIndex:5 ];
    v5.alpha = 0.0;
    UIView *v6 = [[self subviews] objectAtIndex:6 ];
    v6.alpha=0.6;
    
    
    //第二列的设置--------------------------------
    UIView *v7 = [[self subviews] objectAtIndex:7 ];
    v7.alpha = 0.6;
    UIView *v8 = [[self subviews] objectAtIndex:8 ];
    v8.alpha = 0;
    UIView *v9 = [[self subviews] objectAtIndex:9 ];
    v9.alpha = 0;
    UIView *v10 = [[self subviews] objectAtIndex:10 ];
    v10.backgroundColor = [Function colorWithHexString:@"#eae1d8"];
    UIView *v11 = [[self subviews] objectAtIndex:11 ];
    v11.alpha = 0.0;
    UIView *v12 = [[self subviews] objectAtIndex:12 ];
    v12.alpha=0.6;
    
    [self setNeedsDisplay];
    
}