objective-c - UITableView 背景只填充了一半？

Question

不幸的是，我用背景 View (渐变)填充了我的 tableView，只有一半的背景被填充了。

有什么想法可以填补下半场吗？

非常感谢!

代码:

UIView* myView = [[GradientBackground alloc] initWithFrame:CGRectMake(self.view.bounds.origin.x, self.view.bounds.origin.y, self.view.bounds.size.width,  self.view.bounds.size.height)];

myTableView.backgroundColor = [UIColor clearColor];

myTableView.backgroundView = myView;

和Gradientbackground.m

- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
    // Initialization code
}
return self;
}

- (void)drawRect:(CGRect)rect 
{
CGContextRef currentContext = UIGraphicsGetCurrentContext();       
CGGradientRef glossGradient;
CGColorSpaceRef rgbColorspace;
size_t num_locations = 2;
CGFloat locations[2] = { 0.0, 1.0 };
CGFloat components[8] = {  25.0 / 255.0, 89.0 / 255.0, 140.0 / 255.0, 0.65,  // Start color
25.0 / 255.0, 89.0 / 255.0, 140.0 / 255.0, 1.0 }; // End color


//( 25.0 / 255.0 ) green:( 89.0 / 255.0 ) blue:( 140.0 / 255.0 )

rgbColorspace = CGColorSpaceCreateDeviceRGB();
glossGradient = CGGradientCreateWithColorComponents(rgbColorspace, components, locations, num_locations);

CGRect currentBounds = self.bounds;
CGPoint topCenter = CGPointMake(CGRectGetMidX(currentBounds), 0.0f);
CGPoint midCenter = CGPointMake(CGRectGetMidX(currentBounds), CGRectGetMidY(currentBounds));
CGContextDrawLinearGradient(currentContext, glossGradient, topCenter, midCenter, 0);

CGGradientRelease(glossGradient);
CGColorSpaceRelease(rgbColorspace); 
} 

25.0 / 255.0, 89.0 / 255.0, 140.0 / 255.0, 1.0 }; // End color


//( 25.0 / 255.0 ) green:( 89.0 / 255.0 ) blue:( 140.0 / 255.0 )

rgbColorspace = CGColorSpaceCreateDeviceRGB();
glossGradient = CGGradientCreateWithColorComponents(rgbColorspace, components, locations, num_locations);

CGRect currentBounds = self.bounds;
CGPoint topCenter = CGPointMake(CGRectGetMidX(currentBounds), 0.0f);
CGPoint midCenter = CGPointMake(CGRectGetMidX(currentBounds), CGRectGetMidY(currentBounds));
CGContextDrawLinearGradient(currentContext, glossGradient, topCenter, midCenter, 0);

CGGradientRelease(glossGradient);
CGColorSpaceRelease(rgbColorspace); 

Answer 1

您是否在 myView 上设置了 autoresizemask？尝试将其设置为可变高度和宽度。

您还将 myView 的框架设置为 self.bounds 而不是 myTableView.bounds。