IOS微博项目之UITextField

微博项目中，有个自定义搜索框

主要功能还是继承自UITextField，只是将个属性进行了封装

- (instancetype)initWithFrame:(CGRect)frame {
    self = [super initWithFrame:frame];
    if (self) {
        // 背景
        self.background = [UIImage imageWithNamedResizable:@"searchbar_textfield_background"];
        // 左侧搜索Icon
        UIImageView *iconView = [[UIImageView alloc] initWithImage:[UIImage imageWithNamed:@"searchbar_textfield_search_icon"]];
        iconView.bounds = CGRectMake(0, 0, 30, 15);
        iconView.contentMode = UIViewContentModeCenter;
        self.leftView = iconView;
        self.leftViewMode = UITextFieldViewModeAlways;
        // 提醒文字
        NSMutableDictionary *atts = [[NSMutableDictionary alloc] init];
        [atts setValue:[UIColor grayColor] forKey:NSForegroundColorAttributeName];
        self.attributedPlaceholder = [[NSAttributedString alloc] initWithString:@"待得花开虫破茧，我必化蝶向天飞" attributes:atts];
        // 文字大小
        self.font = [UIFont systemFontOfSize:13];
        // 清除按钮
        self.clearButtonMode = UITextFieldViewModeAlways;
        // 设置返回按钮的类型
        self.returnKeyType = UIReturnKeySearch;
        // 设置键盘返回按钮是否可以点击
        self.enablesReturnKeyAutomatically = YES;
    }
    return self;
}