UIEdgeInsets
typedef struct UIEdgeInsets {
CGFloat top, left, bottom, right;
// specify amount to inset (positive) for each of the edges. values can be negative to 'outset'}
UIEdgeInsets;
在UIButton中有三个对EdgeInsets的设置：ContentEdgeInsets、titleEdgeInsets、imageEdgeInsets
@property(nonatomic) UIEdgeInsets contentEdgeInsets UI_APPEARANCE_SELECTOR;
// default is UIEdgeInsetsZero@property(nonatomic) UIEdgeInsets titleEdgeInsets;
// default is UIEdgeInsetsZero@property(nonatomic) BOOL reversesTitleShadowWhenHighlighted;
// default is NO. if YES, shadow reverses to shift between engrave and emboss appearance@property(nonatomic) UIEdgeInsets imageEdgeInsets;
// default is UIEdgeInsetsZero
UIEdgeInsetsMake
里面的四个参数表示距离上边界、左边界、下边界、右边界的距离，默认都为零，title／image在button的正中央
UIKIT_STATIC_INLINE UIEdgeInsets UIEdgeInsetsMake(CGFloat top, CGFloat left, CGFloat bottom, CGFloat right) {
UIEdgeInsets insets = {
top, left, bottom, right}
;
return insets;
}
self.view.backgroundColor = [UIColor blackColor];
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
//button的类型 button.frame = CGRectMake(100, 100,90, 90);
//button的frame button.backgroundColor = [UIColor cyanColor];
//button的背景颜色// [button setBackgroundImage:[UIImage imageNamed:@"man_64.png"] forState:UIControlStateNormal];
// 在UIButton中有三个对EdgeInsets的设置：ContentEdgeInsets、titleEdgeInsets、imageEdgeInsets [button setImage:[UIImage imageNamed:@"IconHome@2x.png"] forState:UIControlStateNormal];
//给button添加image button.imageEdgeInsets = UIEdgeInsetsMake(5,13,21,button.titleLabel.bounds.size.width);
//设置image在button上的位置（上top，左left，下bottom，右right）这里可以写负值，对上写－5，那么image就象上移动5个像素 [button setTitle:@"首页" forState:UIControlStateNormal];
//设置button的title button.titleLabel.font = [UIFont systemFontOfSize:16];
//title字体大小 button.titleLabel.textAlignment = NSTextAlignmentCenter;
//设置title的字体居中 [button setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
//设置title在一般情况下为白色字体 [button setTitleColor:[UIColor grayColor] forState:UIControlStateHighlighted];
//设置title在button被选中情况下为灰色字体 button.titleEdgeInsets = UIEdgeInsetsMake(71, -button.titleLabel.bounds.size.width-50, 0, 0);
//设置title在button上的位置（上top，左left，下bottom，右right）// [button setContentEdgeInsets:UIEdgeInsetsMake(70, 0, 0, 0)];
//// button.contentHorizontalAlignment = UIControlContentHorizontalAlignmentCenter;
//设置button的内容横向居中。。设置content是title和image一起变化 [button addTarget:self action:@selector(tap) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button];
//button相应的事件-(void)tap {
NSLog(@"tap a button");
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"hello" message:@"willingseal" delegate:self cancelButtonTitle:@"ok" otherButtonTitles: nil];
[alertView show];
}
效果图：
我这里使用的image是64*64的
－－
那就一个button，这个button的背景图片中既有图片又有文字就可以了，找个美工帮忙弄一下应该很逼真的。。。！！
以上就是本文给大家分享的iOS - UIButton(UIEdgeInsets)／设置button上的文字和图片上下垂直居中对齐，希望大家喜欢。
