//

//  QRViewController.m

//

#import "QRViewController.h"

#import "QRFlag.h"

#import "QRFlagView.h"

@interface QRViewController ()<UIPickerViewDataSource,UIPickerViewDelegate>

@property (nonatomic,strong) NSArray *flags;

@end

@implementation QRViewController

- (void)viewDidLoad {

    [super viewDidLoad];

}

/**

 *懒加载国旗数据

 */

- (NSArray *)flags

{

    if(_flags==nil){

        NSString *path=[[NSBundle mainBundle] pathForResource:@"flags" ofType:@"plist"];

        NSArray *arrayList=[NSArray arrayWithContentsOfFile:path];

        NSMutableArray *dictArray=[NSMutableArray array];

        for (NSDictionary *dict in arrayList) {

            QRFlag *flag=[QRFlag flagWithDict:dict];

            [dictArray addObject:flag];

        }

        _flags=dictArray;

    }

    return _flags;

}

#pragma mark - 设置数据源

/**

 *设置列数

 */

-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView

{

    return ;

}

/**

 *设置某一列的行

 */

- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component

{

    return self.flags.count;

}

/**

 *设置某一列中的某一行的显示数据

 */

//- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component

//{

//    QRFlag *flag=self.flags[row];

//    return flag.name;

//}

/**

 *  第component列的第row行显示怎样的view

 *  每当有一行内容出现在视野范围内,就会调用(调用频率高)

 */

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

{

    QRFlagView *flagView=[QRFlagView flagViewWithResuingView:view];

    flagView.flag=self.flags[row];

    return flagView;

}

- (CGFloat)pickerView:(UIPickerView *)pickerView rowHeightForComponent:(NSInteger)component

{

    return [QRFlagView flogViewHeight];

}

@end

#import <Foundation/Foundation.h>

@interface QRFlag : NSObject

@property (nonatomic,copy) NSString *name;

@property (nonatomic,copy) NSString *icon;

+(instancetype)flagWithDict:(NSDictionary *)dict;

- (instancetype)initWithDict:(NSDictionary *)dict;

@end

//===================

#import "QRFlag.h"

@implementation QRFlag

+(instancetype)flagWithDict:(NSDictionary *)dict

{

    return [[self alloc] initWithDict:dict];

}

- (instancetype)initWithDict:(NSDictionary *)dict

{

    if(self=[super init]){

        [self setValuesForKeysWithDictionary:dict];

    }

    return self;

}

@end

#import <UIKit/UIKit.h>

@class QRFlag;

@interface QRFlagView : UIView

@property (nonatomic,strong) QRFlag *flag;

+ (instancetype)flagViewWithResuingView:(UIView *)resuingView;

+(CGFloat)flogViewHeight;

@end

//=================

#import "QRFlagView.h"

#import "QRFlag.h"

@interface QRFlagView()

@property (weak, nonatomic) IBOutlet UILabel *name;

@property (weak, nonatomic) IBOutlet UIImageView *icon;

@end

@implementation QRFlagView

+ (instancetype)flagViewWithResuingView:(UIView *)resuingView

{

    if(resuingView==nil)

    {

    NSBundle *bundle=[NSBundle mainBundle];

    NSArray *obj=[bundle loadNibNamed:@"QRFlag" owner:nil options:nil];

    return [obj lastObject];

    }else{

        return (QRFlag *)resuingView;

    }

}

+(CGFloat)flogViewHeight

{

    return ;

}

-(void)setFlag:(QRFlag *)flag

{

    self.name.text=flag.name;

    self.icon.image=[UIImage imageNamed:flag.icon];

}

@end