如何使用 iOS 创建一个大的红色 UIButton? [英] How can I create a big, red UIButton with iOS?

问题描述

使用 iOS，我将如何创建一个类似于在 iPhone 上删除联系人时使用的红色删除"按钮?

Using iOS, how would I go about creating a red "delete" button similar to the one used when deleting contacts on the iPhone?

推荐答案

你首先从一个可拉伸的图像开始:

You first start with a stretchable image:

替代文字 http://grab.by/4lP

然后您制作一个以拉伸图像为背景的按钮并应用文本.

Then you make a button with the stretched image as the background and apply text.

UIButton *sampleButton = [UIButton buttonWithType:UIButtonTypeCustom];
[sampleButton setFrame:CGRectMake(kLeftMargin, 10, self.view.bounds.size.width - kLeftMargin - kRightMargin, 52)];
[sampleButton setTitle:@"Button Title" forState:UIControlStateNormal];
[sampleButton setFont:[UIFont boldSystemFontOfSize:20]];
[sampleButton setBackgroundImage:[[UIImage imageNamed:@"redButton.png"] stretchableImageWithLeftCapWidth:10.0 topCapHeight:0.0] forState:UIControlStateNormal];
[sampleButton addTarget:self action:@selector(buttonPressed) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:sampleButton];

显然，您需要调整框架原点和大小以匹配您的应用，以及目标、选择器和标题.

Obviously, you will need to adjust the frame origin and size to match your app, as well as the target, selector, and title.

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