iOS 轻量级购物车输入框组件

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先看效果

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1.加入最大值最小值判断

2.可以设置初始值

3.代理和block两种回调

主要代码:

- (void)textChange: (NSNotification *)noti {
    
    NSInteger count = self.text.integerValue;

    if (count >= self.maxCount) {
        self.rightButton.enabled = NO;
        self.leftButton.enabled = YES;
        self.text = [NSString stringWithFormat:@"%ld",(long)self.maxCount];
    }else if (count == self.minCount) {
        self.leftButton.enabled = NO;
        self.rightButton.enabled = YES;

    } else if (count < self.maxCount && count > self.minCount) {
        self.leftButton.enabled = YES;
        self.rightButton.enabled = YES;
    }
    
    if (self.countFielddDelegate && [self.countFielddDelegate respondsToSelector:@selector(countField:count:)]) {
        [self.countFielddDelegate countField:self count:self.text.integerValue];
    }
    
    if (self.countBlock) {
        self.countBlock(self.text.integerValue);
    }
}

- (void)dealloc {
    [[NSNotificationCenter defaultCenter] removeObserver:self name:UITextFieldTextDidChangeNotification object:self];
}
- (void)setCount:(NSInteger)count {
    _count = count;
    self.text = [NSString stringWithFormat:@"%ld",(long)count];
}
- (void)clickButton: (UIButton *)button {
    button.selected = !button.selected;
    NSInteger count = self.text.integerValue;

    if (button.tag == GHCountFieldButtonType_add) {
        if (count < self.maxCount) {
            count++;
            button.enabled = YES;
            
            if (count ==self.maxCount) {
                button.enabled = NO;
            }
            self.leftButton.enabled = YES;

        }
    } else if (button.tag == GHCountFieldButtonType_sub) {
        if (count > self.minCount) {
            count--;
            if (count == self.minCount) {
                button.enabled = NO;

            }
            self.rightButton.enabled = YES;

        } else {
            button.enabled = YES;
        }
    }
    self.text = [NSString stringWithFormat:@"%ld",(long)count];

    if (self.countFielddDelegate && [self.countFielddDelegate respondsToSelector:@selector(countField:count:)]) {
        [self.countFielddDelegate countField:self count:self.text.integerValue];
    }
    
    if (self.countBlock) {
        self.countBlock(self.text.integerValue);
    }
}

构造方法

   GHCountField *countField = [[GHCountField alloc]initWithFrame:CGRectMake(100, 100, 100, 40)];
    countField.count = 4;
    countField.maxCount = 10;
    countField.countFielddDelegate = self;
    countField.countBlock = ^(NSInteger count) {
        NSLog(@"回调 :%ld",(long)count);
    };
    [self.view addSubview:countField];

代理方法

- (void)countField:(GHCountField *)countField count:(NSInteger)count {
    NSLog(@"代理:%ld",(long)count);
}

demo地址