蘋果選擇器严衬，還是比較方便使用的巡李，但是每次抚笔，UI設(shè)計(jì)師都會(huì)有自己的獨(dú)特見解，哈哈侨拦，有點(diǎn)意思殊橙。有一個(gè)開源的框架自定義程度還挺高的，好像是通過UITableView 來做的。還挺有意思的膨蛮，大家可以去看看螃概。傳送門 -- PGDatePicker

下面針對(duì)UIPickerView 做一些調(diào)整，先看效果圖鸽疾。

效果圖

下面是實(shí)現(xiàn)代碼：Demo

原理：就是在復(fù)用的時(shí)候吊洼，進(jìn)行修改。和 UITableView 自定義Cell 等類似制肮。

- (UIView *)pickerView:(UIPickerView *)pickerView
            viewForRow:(NSInteger)row forComponent:(NSInteger)component
           reusingView:(UIView *)view{
    
    //普通狀態(tài)的顏色
    UILabel* norLabel = (UILabel*)view;
    if (!norLabel){
        norLabel = [[UILabel alloc] init];
        norLabel.textColor = [UIColor grayColor];
        norLabel.adjustsFontSizeToFitWidth = YES;
        [norLabel setTextAlignment:NSTextAlignmentCenter];
        [norLabel setBackgroundColor:[UIColor blueColor]];
        [norLabel setFont:[UIFont systemFontOfSize:13]];
        
        //icon
        UIImageView *av = [[UIImageView alloc] initWithFrame:CGRectMake(30, 3, 20, 20)];
        av.image = [UIImage imageNamed:[NSString stringWithFormat:@"img_%d", (int)row%2]];
        [norLabel addSubview:av];
    }
    norLabel.text = [self pickerView:pickerView
                            titleForRow:row
                           forComponent:component];
    
    //當(dāng)前選中的顏色
    UILabel *selLb = (UILabel*)[pickerView viewForRow:row forComponent:0];
    if (selLb) {
        selLb.textColor = [UIColor brownColor];
        selLb.adjustsFontSizeToFitWidth = YES;
        [selLb setTextAlignment:NSTextAlignmentCenter];
        [selLb setBackgroundColor:[UIColor purpleColor]];
        [selLb setFont:[UIFont systemFontOfSize:16]];
    }
    
    //下一個(gè)選中的顏色（為了選中狀態(tài)不突兀冒窍，自己注釋看看效果）
    UILabel *selLb1 = (UILabel*)[pickerView viewForRow:row + 1 forComponent:0];
    if (selLb1) {
        selLb1.textColor = [UIColor redColor];
        selLb1.adjustsFontSizeToFitWidth = YES;
        [selLb1 setTextAlignment:NSTextAlignmentCenter];
        [selLb1 setBackgroundColor:[UIColor greenColor]];
        [selLb1 setFont:[UIFont systemFontOfSize:16]];
    }
    
    //設(shè)置分割線
    for (UIView *line in pickerView.subviews) {
        if (line.frame.size.height < 1) {//0.6667
            line.backgroundColor = [UIColor blackColor];
            CGRect tempRect = line.frame;
            CGFloat lineW = 120;
            line.frame = CGRectMake((pickerView.frame.size.width - lineW) * 0.5, tempRect.origin.y, lineW, 2);
        }
    }
    
    return norLabel;
}