1: Use of uipickerView 2: return a rich text display 3: set the cell line height 4: Set return a custom view 5: Set the color of the top and bottom lines of the PickerView or hide them

Instantiation of picker View

    self.pickView = [[UIPickerView alloc] init];
    self.pickView.dataSource = self;
    self.pickView.delegate = self;
    self.pickView.userInteractionEnabled = NO;
    [self.backGroundView addSubview:self.pickView];
    self.pickView.showsSelectionIndicator = NO;
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Set up the self. PickView. UserInteractionEnabled = NO; Is to make the user can not click on the rollover effect

Use several required usage functions

   #pragma mark - uipickview DELEGATE- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView {
    return 1; } - (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component {
    return self.dataArry.count;
   }
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2.1 Returns a rich text editing effect

- (NSAttributedString *)pickerView:(UIPickerView *)pickerView attributedTitleForRow:(NSInteger)row forComponent:(NSInteger)component{
    NSString * reStr = self.dataArry[row];
    // Create a rich text
    NSMutableAttributedString * attriStr = [[NSMutableAttributedString alloc] initWithString:reStr];
    // Modify the styles of different text in rich text
    [attriStr addAttribute:NSForegroundColorAttributeName value:YSColor(88.164.240) range:NSMakeRange(0, reStr.length)];
    //[attriStr addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:14] range:NSMakeRange(0, reStr.length)];
    ((UIView*) [self.pickView.subviews objectAtIndex:1]).backgroundColor = [YSColor(255.255.255) colorWithAlphaComponent:0.5];
    return attriStr;
}
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2.2 Setting the Row height of the Cell

- (CGFloat)pickerView:(UIPickerView *)pickerView rowHeightForComponent:(NSInteger)component {
    return 20;
}
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2.3 Set the Cell to a Custom View

- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view {
    CGFloat width = 125.0f;
    CGFloat height = 20.0f;
    
    UIView * myView = [[UIView alloc] initWithFrame:CGRectMake(0.0, width, height)];
    myView.backgroundColor = [UIColor clearColor];
    
    UILabel * complateLabel = [[UILabel alloc] init];
    complateLabel.center = myView.center;
    complateLabel.bounds = CGRectMake(0.0, width, height);
    complateLabel.textColor = YSColor(88.164.240);
    complateLabel.textAlignment = NSTextAlignmentCenter;
    complateLabel.font = FONTWITHSIZE_LIGHT(14);
    complateLabel.text =  self.dataArry[row];
    [myView addSubview:complateLabel];
    
    ((UIView*) [self.pickView.subviews objectAtIndex:1]).backgroundColor = [YSColor(255.255.255) colorWithAlphaComponent:0.5];
    if (IS_IOS7) {
        ((UIView*) [self.pickView.subviews objectAtIndex:2]).backgroundColor = [YSColor(255.255.255) colorWithAlphaComponent:0.5];
    }
    return myView;
}
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Here,

((UIView*) [self.pickView.subviews objectAtIndex:1]).backgroundColor = [YSColor(255.255.255) colorWithAlphaComponent:0.5];

((UIView*) [self.pickView.subviews objectAtIndex:2]).backgroundColor = [YSColor(255.255.255) colorWithAlphaComponent:0.5];
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Set the color of the top and bottom lines of the pickView, or hide it