UITableView背景只填充了一半？

Question

不幸的是，我填充了tableView背景視圖（漸變），只填充了背景的一半。

任何想法如何填補下半年？

非常感謝提前！

代碼：

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

明白了。我的梯度代碼是錯誤的。我使用了視圖的中間部分，但漸變應該在底部結束。

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

CGRect currentBounds = self.bounds; 
CGPoint topCenter = CGPointMake(CGRectGetMidX(currentBounds), CGRectGetMaxY(currentBounds)); 
CGPoint bottomCent = CGPointMake(CGRectGetMidX(currentBounds), CGRectGetMinY(currentBounds)); 
CGContextDrawLinearGradient(currentContext, glossGradient, topCenter, bottomCent, 0); 

CGGradientRelease(glossGradient); 
CGColorSpaceRelease(rgbColorspace); 

Answer 2

你有設置MyView的的autoresizemask？嘗試將其設置爲可變的高度和寬度。

此外，您將myView的框架設置爲self.bounds而不是myTableView.bounds。