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WZBGradualTableView

一个透明度渐变的TableView

很多app用到了这种效果,比如歌词显示、直播间聊天记录等。 效果如下:

image image

使用方法:

/*
 * frame:tableView的frame
 * direction:透明渐进的方向
 * gradualValue:透明范围值,如果只有一个方向,此值传一个NSNumber、NSString即可,值的范围0—1。如果是两个方向,则需要传一个数组,数组里边传两个NSNumber或者NSString
 ***/
+ (instancetype)gradualTableViewWithFrame:(CGRect)frame direction:(WZBTableViewGradualDirection)direction gradualValue:(id)gradualValue;

参数值说明一下,direction代表方向,是一个位移枚举,如果想让tableView顶部渐变,则此值为WZBTableViewGradualDirectionTop,如果为底部渐变,则此值为WZBTableViewGradualDirectionBottom,如果上下都要渐变,则需要WZBTableViewGradualDirectionTop | WZBTableViewGradualDirectionBottom。gradualValue代表渐变范围值,值的范围为0-1,如果想让顶部20%渐变,此值为@(0.2)。如果想顶部底部都有20%渐变,此值为@[@(0.2), @(0.2)]。

如下:

WZBGradualTableView *tableView = [WZBGradualTableView gradualTableViewWithFrame:self.view.bounds direction:(WZBTableViewGradualDirectionTop | WZBTableViewGradualDirectionBottom)  gradualValue:@[@(.3), @0.3]];

则显示效果为:

image

如果这样写

[WZBGradualTableView gradualTableViewWithFrame:CGRectMake(0, self.view.frame.size.height - 180, self.view.frame.size.width, 140) direction:WZBTableViewGradualDirectionTop  gradualValue:@.3f]

效果如下:

image

怎么样,您学会怎么用了吗?

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