iOS开发教程:创建透明的UIToolbar
iOS开发教程:创建透明的UIToolbar
今天需要创建一个透明的UIToolbar,便看了下SDK,使用下面代码
- CGRect barFrame = CGRectMake(900, 0, 124, 40);
- UIToolbar *tb;
- tb = [[UIToolbar alloc]initWithFrame:barFrame];
- tb.barStyle =UIBarStyleDefault;
- tb.tintColor = [UIColor clearColor];
- tb.translucent = YES;
在边缘的位置们依然能看出视图层之间的层叠,所以查看了些资料,原来正确的方法是子类化UIToolbar,设置其backgroundColor
- @interface TranslucentToolbar : UIToolbar
- @end
- @implementation TranslucentToolbar
- - (void)drawRect:(CGRect)rect {
- // do nothing
- }
- - (id)initWithFrame:(CGRect)aRect {
- if ((self = [super initWithFrame:aRect])) {
- self.opaque = NO;
- self.backgroundColor = [UIColor clearColor];
- self.clearsContextBeforeDrawing = YES;
- }
- return self;
- }
- @end
- TranslucentToolbar *tb;
- tb = [[TranslucentToolbar alloc]initWithFrame:barFrame];
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