UIButton中的**EdgeInsets是做什么用的?
UIEdgeInsetsMake
Creates an edge inset for a button or view.
An inset is a margin
around the drawing rectangle where each side (left, right, top, and
bottom) can have a different value.
给一个button或者view创建一个嵌入的边缘.
inset是一个矩形view页边空白,每一边都可以设定一个不同的值.
图片素材: [email protected]
- (void)viewDidLoad
{
[super viewDidLoad];UIButton *normalButton = nil;
UIButton *edgeButton = nil;// normalButton
{
// 初始化按钮
normalButton = [[UIButton alloc] initWithFrame:CGRectMake(100, 100, 100, 100)];
normalButton.backgroundColor = [UIColor blackColor];// 按钮图片
[normalButton setImage:[UIImage imageNamed:@"1"] forState:UIControlStateNormal];
}// EdgeButton
{
// 初始化按钮
edgeButton = [[UIButton alloc] initWithFrame:CGRectMake(100, 210, 100, 100)];
edgeButton.backgroundColor = [UIColor blackColor];// 按钮图片
[edgeButton setImage:[UIImage imageNamed:@"1"] forState:UIControlStateNormal];// 设置图片间距
edgeButton.imageEdgeInsets = UIEdgeInsetsMake(10, 10, 10, 10);
}[self.view addSubview:normalButton];
[self.view addSubview:edgeButton];
}
viewDidLoad
以下是模拟器显示结果:
从结果中可以看到,设置了图片的imageEdgeInsets后,图片显示被缩放了哦.
再来测试文本的titleEdgeInsets
- (void)viewDidLoad
{
[super viewDidLoad];UIButton *normalButton = nil;
UIButton *edgeButton = nil;// normalButton
{
// 初始化按钮
normalButton = [[UIButton alloc] initWithFrame:CGRectMake(100, 100, 100, 100)];
normalButton.backgroundColor = [UIColor blackColor];[normalButton setTitle:@"Y.X." forState:UIControlStateNormal];
[normalButton setTitleColor:[UIColor redColor] forState:UIControlStateNormal];
}// EdgeButton
{
// 初始化按钮
edgeButton = [[UIButton alloc] initWithFrame:CGRectMake(100, 210, 100, 100)];
edgeButton.backgroundColor = [UIColor blackColor];[edgeButton setTitle:@"Y.X." forState:UIControlStateNormal];
[edgeButton setTitleColor:[UIColor redColor] forState:UIControlStateNormal];edgeButton.titleEdgeInsets = UIEdgeInsetsMake(60, 60, 0, 0);
}[self.view addSubview:normalButton];
[self.view addSubview:edgeButton];
}
viewDidLoad
以下是运行结果:
文本并没有缩放的说,再试试这么设置:
UIButton还有一个属性叫contentEdgeInsets.
Use this property to resize and reposition the effective drawing
rectangle for the button content. The content comprises the button
image and button
title.
实际上,这个contentEdgeInsets是用来同时设置imageEdgeInsets与titleEdgeInsets的,没什么特别的,就不举例子了:)
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