如何在圓形按鈕物鏡內適合圖像c

Question

我在關鍵路徑中使用layer.cornerRadius在圓形窗體中創建了一個按鈕。我想添加一個圖像。我如何將圖像添加到我的按鈕，圖像是適合我的按鈕的大小相同

Answer 1

使用此控制設置圖像尺寸調整按鈕大小：

[btn setImage:[UIImage imageNamed:@"image_name"] forState:UIControlStateNormal];  
btn.imageView.contentMode = UIViewContentModeScaleAspectFit; //set to fit button size 

Answer 2

它應該是這樣的

UIImage *btnImage = [UIImage imageNamed:@"image.png"]; 

[buttonName setImage:btnImage forState:UIControlStateNormal]; 

Write the below code in viewDidAppear instead of viiewDidLoad 

buttonName.layer.masksToBounds = YES; 

buttonName.layer.cornerRadius = 20;//half of the button height 

Answer 3

嘗試使用此方法適合圖像按鈕：

UIButton *button =[[UIButton alloc]initWithFrame: CGRectMake(10, 10, 50, 32)]; 
[button setImage:[UIImage imageNamed:@"image_name"] forState:UIControlStateNormal]; 

// to set image to fit button size 
button.imageView.contentMode = UIViewContentModeScaleAspectFit; 
//ScaleToFill (UIViewContentModeScaleToFill) 
//ScaleAspectFit (UIViewContentModeScaleAspectFit) 
//ScaleAspectFill (UIViewContentModeScaleAspectFill)