iOS - UIButton(UIEdgeInsets)／设置button上的文字和图片上下垂直居中对齐

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*

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:@"[e-mail]"] 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。