顾名思义：用到时再去加载，而且也只加载一次
#import "XMGShopView.h"
#import "XMGShop.h"
@interface XMGShopView()
/** 图片控件 */
@property (nonatomic, strong) UIImageView *iconView;
/** 名字控件 */
@property (nonatomic, strong) UILabel *nameLabel;
@end
@implementation XMGShopView
+ (instancetype)shopView
{
return [[self alloc] init];
}
# 懒加载模式 #
- (UIImageView *)iconView
{
if (_iconView == nil) {
UIImageView *iconView = [[UIImageView alloc] init];
iconView.backgroundColor = [UIColor blueColor];
[self addSubview:iconView];
_iconView = iconView;
}
return _iconView;
}
- (UILabel *)nameLabel
{
if (_nameLabel == nil) {
UILabel *nameLabel = [[UILabel alloc] init];
nameLabel.font = [UIFont systemFontOfSize:11];
nameLabel.textAlignment = NSTextAlignmentCenter;
nameLabel.backgroundColor = [UIColor redColor];
[self addSubview:nameLabel];
_nameLabel = nameLabel;
}
return _nameLabel;
}
/**
* 这个方法专门用来布局子控件，一般在这里设置子控件的frame
* 当控件本身的尺寸发生改变的时候，系统会自动调用这个方法
*
*/
- (void)layoutSubviews{
// 一定要调用super的layoutSubviews
[super layoutSubviews];
CGFloat shopW = self.frame.size.width;
CGFloat shopH = self.frame.size.height;
self.iconView.frame = CGRectMake(0, 0, shopW, shopW);
self.nameLabel.frame = CGRectMake(0, shopW, shopW, shopH - shopW);
}
- (void)setShop:(XMGShop *)shop
{
_shop = shop;
self.nameLabel.text = shop.name;
self.iconView.image = [UIImage imageNamed:shop.icon];
}
@end
