Iphone 如何在iOS 7中设计全圆形按钮？

我正在为iOS 7创建一个应用程序，我想要一个像呼叫键盘一样的全圆形按钮。

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有人知道我们如何使iOS 7的按钮完全圆整，也可以为圆整按钮设置图像吗？

//在.h文件中支持框架

**#import <QuartzCore/QuartzCore.h>**

UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
[button setImage:[UIImage imageNamed:@"imagename.png"] forState:UIControlStateNormal];
[button addTarget:self action:@selector(click) forControlEvents:UIControlEventTouchUpInside];
[button setTitle:@"Show View" forState:UIControlStateNormal];
button.frame = CGRectMake(135.0, 180.0, 40.0, 40.0);//width and height should be same value
button.clipsToBounds = YES;

button.layer.cornerRadius = 20;//half of the width
button.layer.borderColor=[UIColor redColor].CGColor;
button.layer.borderWidth=2.0f;

[self.view addSubview:button];

**#导入**
UIButton*button=[UIButton button类型：UIButtonTypeCustom]；
[按钮设置图像：[UIImage imagename:@“imagename.png”]用于状态：UIControlStateNormal]；
[按钮添加目标：自我操作：@选择器（单击）用于控制事件：UIControlEventTouchUpInside]；
[按钮设置标题：@“显示视图”状态：uicontrol状态正常]；
button.frame=CGRectMake（135.0,180.0,40.0,40.0）//宽度和高度应为相同的值
button.clipstobunds=是；
button.layer.cornerRadius=20//一半宽度
button.layer.borderColor=[UIColor redColor].CGColor；
button.layer.borderWidth=2.0f；
[self.view addSubview:按钮]；

为此，您需要使用QuartzCore/QuartzCore框架。这里有一个很好的教程看看这个

有几种方法。例如，您可以对按钮图像使用UIImageView，对其使用圆角

UIImageView *avatar = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 33, 33)];
avatar.contentMode = UIViewContentModeScaleAspectFill;
avatar.layer.cornerRadius = 16;
avatar.layer.borderColor = [UIColor whiteColor].CGColor;
avatar.layer.borderWidth = 1;
avatar.clipsToBounds = YES;

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是的，很简单。您需要添加quartzcore框架，并且按钮的框架必须是正方形，宽度和高度相等

#import <QuartzCore/QuartzCore.h>


myButton.layer.cornerRadius = myButton.frame.size.height/2.0;
myButton.clipsToBounds = YES;
myButton.layer.borderWidth = 1.0;
myButton.layer.borderColor = [UIColor blueColor].CGColor;
myButton.layer.backgroundColor =[UIColor cyanColor].CGColor;
myButton.backgroundColor = nil;

或者你可以这样做：

[myButton setImage:[self generateButtonImageOfSize:myButton.frame.size] forState:UIControlStateNormal];


-(UIImage *)generateButtonImageOfSize:(CGSize )buttonSize{
 UIGraphicsBeginImageContextWithOptions(buttonSize, NO , 0);

 CGContextRef context = UIGraphicsGetCurrentContext();

 CGContextSetStrokeColorWithColor(context, [UIColor blueColor].CGColor);
 CGContextSetFillColorWithColor(context, [UIColor cyanColor].CGColor);
 CGContextSetLineWidth(context, 1.0);

 CGRect br = CGRectMake(0, 0, buttonSize.width, buttonSize.height);

 CGContextFillEllipseInRect(context, br);
 CGContextStrokeEllipseInRect(context, br);


//theres a pretty circle, wanna draw other stuff? do it here..




 UIImage *result = UIGraphicsGetImageFromCurrentImageContext();
  UIGraphicsEndImageContext();
  return result;
}

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发布一些你尝试过的代码？哈哈，当我开始键入时，并没有答案，问题是如何在按钮中设置图像，所以请更新你的answer@Rushabh乌尔斯也不错answer@Jef+1很好的解释

[myButton setImage:[self generateButtonImageOfSize:myButton.frame.size] forState:UIControlStateNormal];


-(UIImage *)generateButtonImageOfSize:(CGSize )buttonSize{
 UIGraphicsBeginImageContextWithOptions(buttonSize, NO , 0);

 CGContextRef context = UIGraphicsGetCurrentContext();

 CGContextSetStrokeColorWithColor(context, [UIColor blueColor].CGColor);
 CGContextSetFillColorWithColor(context, [UIColor cyanColor].CGColor);
 CGContextSetLineWidth(context, 1.0);

 CGRect br = CGRectMake(0, 0, buttonSize.width, buttonSize.height);

 CGContextFillEllipseInRect(context, br);
 CGContextStrokeEllipseInRect(context, br);


//theres a pretty circle, wanna draw other stuff? do it here..




 UIImage *result = UIGraphicsGetImageFromCurrentImageContext();
  UIGraphicsEndImageContext();
  return result;
}