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iOS自定义UITabBar中间按钮

转载 作者:qq735679552 更新时间:2022-09-28 22:32:09 25 4
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ios自定义uitabbar中间按钮的具体代码,供大家参考,具体内容如下 。

iOS自定义UITabBar中间按钮

自定义yltbabar继承自uitabbar 。

git地址 。

yltbabar.h 。

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//
// yltabbar.h
// 自定义tabbar
//
// created by nyl on 2018/10/15.
// copyright © 2018年 nieyinlong. all rights reserved.
//
 
#import <uikit/uikit.h>
//tab页面个数
typedef ns_enum(nsinteger, ktbabaritemuitype) {
  ktbabaritemuitype_three = 3, //底部3个选项
  ktbabaritemuitype_five = 5, //底部5个选项
};
 
@ class yltabbar;
 
@protocol yltabbardelegate <nsobject>
 
-( void )tabbar:(yltabbar *)tabbar clickcenterbutton:(uibutton *)sender;
 
@end
 
 
@interface yltabbar : uitabbar
 
@property (nonatomic, weak) id<yltabbardelegate> tabdelegate;
@property (nonatomic, strong) nsstring *centerbtntitle;
@property (nonatomic, strong) nsstring *centerbtnicon;
 
+ (instancetype)instancecustomtabbarwithtype:(ktbabaritemuitype)type;
 
@end

yltbabar.m 。

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//
// yltabbar.m
// 自定义tabbar
//
// created by nyl on 2018/10/15.
// copyright © 2018年 nieyinlong. all rights reserved.
//
 
#import "yltabbar.h"
 
@interface yltabbar()
 
@property(nonatomic, strong) uibutton *centerbutton;
@property(nonatomic, strong) uilabel *centertitle;
@property (nonatomic,assign) ktbabaritemuitype type;
 
@end
 
@implementation yltabbar
 
+(instancetype)instancecustomtabbarwithtype:(ktbabaritemuitype)type{
  yltabbar *tabbar = [[yltabbar alloc] init];
  tabbar.type = type;
  return tabbar;
}
 
-(instancetype)initwithframe:(cgrect)frame{
  self = [super initwithframe:frame];
  if (self) {
  self.translucent = no;
  uibutton *plusbtn = [uibutton buttonwithtype:uibuttontypecustom];
  self.centerbutton = plusbtn;
  [plusbtn addtarget:self action:@selector(plusbtndidclick) forcontrolevents:uicontroleventtouchupinside];
  [self addsubview:plusbtn];
 
  uilabel *lbltitle = [[uilabel alloc] init];
  self.centertitle = lbltitle;
  lbltitle.font = [uifont systemfontofsize:10];
  lbltitle.textcolor = [uicolor blackcolor];
  lbltitle.textalignment = nstextalignmentcenter;
  [self addsubview:lbltitle];
 
  }
  return self;
}
 
-( void )plusbtndidclick{
  if (self.tabdelegate && [self.tabdelegate respondstoselector:@selector(tabbar:clickcenterbutton:)]) {
  [self.tabdelegate tabbar:self clickcenterbutton:self.centerbutton];
  }
}
 
 
// 调整子视图的布局
-( void )layoutsubviews{
  [super layoutsubviews];
  cgfloat width = self.frame.size.width/self.type;
  class class = nsclassfromstring(@ "uitabbarbutton" );
  for (uiview *view in self.subviews) {
  if ([view isequal:self.centertitle]) { //self.centerbutton
   view.frame = cgrectmake(0, 0, width, 15);
   view.center = cgpointmake(self.frame.size.width/2, self.frame.size.height - view.frame.size.height + 8);
  } else if ([view isequal:self.centerbutton]) { //self.centerbutton
   view.frame = cgrectmake(0, 0, width, self.frame.size.height);
   [view sizetofit];
   view.center = cgpointmake(self.frame.size.width/2, 10);
  } else if ([view iskindofclass: class ]){ //system button
   cgrect frame = view.frame;
   int indexfromorign = view.frame.origin.x/width; //防止uiview *view in self.subviews 获取到的不是有序的
   if (indexfromorign >= (self.type - 1) / 2) {
   indexfromorign++;
   }
   cgfloat x = indexfromorign * width;
   //如果是系统的uitabbarbutton,那么就调整子控件位置,空出中间位置
   view.frame = cgrectmake(x, view.frame.origin.y, width, frame.size.height);
  
   //调整badge postion
   for (uiview *badgeview in view.subviews){
   nsstring *classname = nsstringfromclass([badgeview class ]);
   // looking for _uibadgeview
   if ([classname rangeofstring:@ "badgeview" ].location != nsnotfound){
    badgeview.layer.transform = catransform3didentity;
    badgeview.layer.transform = catransform3dmaketranslation(-17.0, 1.0, 1.0);
    break ;
   }
   }
  }
  }
}
 
-(uiview *)hittest:(cgpoint)point withevent:(uievent *)event{
  //这一个判断是关键,不判断的话push到其他页面,点击发布按钮的位置也是会有反应的,这样就不好了
  //self.ishidden == no 说明当前页面是有tabbar的,那么肯定是在导航控制器的根控制器页面
  //在导航控制器根控制器页面,那么我们就需要判断手指点击的位置是否在发布按钮身上
  //是的话让发布按钮自己处理点击事件,不是的话让系统去处理点击事件就可以了
  if (self.ishidden == no) {
  //将当前tabbar的触摸点转换坐标系,转换到发布按钮的身上,生成一个新的点
  cgpoint newp = [self convertpoint:point toview:self.centerbutton];
 
  //判断如果这个新的点是在发布按钮身上,那么处理点击事件最合适的view就是发布按钮
  if ( [self.centerbutton pointinside:newp withevent:event]) {
   return self.centerbutton;
  } else { //如果点不在发布按钮身上,直接让系统处理就可以了
   return [super hittest:point withevent:event];
  }
  }
  else { //tabbar隐藏了,那么说明已经push到其他的页面了,这个时候还是让系统去判断最合适的view处理就好了
  return [super hittest:point withevent:event];
  }
}
 
-( void )setcenterbtnicon:(nsstring *)centerbtnicon{
  _centerbtnicon = centerbtnicon;
  [self.centerbutton setbackgroundimage:[uiimage imagenamed:self.centerbtnicon] forstate:uicontrolstatenormal];
  [self.centerbutton setbackgroundimage:[uiimage imagenamed:self.centerbtnicon] forstate:uicontrolstatehighlighted];
}
 
-( void )setcenterbtntitle:(nsstring *)centerbtntitle{
  _centerbtntitle = centerbtntitle;
  self.centertitle.text = centerbtntitle;
}
 
 
@end

在uitabbarcontroller中使用  。

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// viewdidloda中, kvo形式添加
[self setvalue:self.yltabbar forkey:@ "tabbar" ];
 
- (yltabbar *)yltabbar {
  if (!_yltabbar) {
  _yltabbar = [yltabbar instancecustomtabbarwithtype:ktbabaritemuitype_five];
  _yltabbar.centerbtnicon = @ "centericon" ;
  _yltabbar.tabdelegate = self;
  }
  return _yltabbar;
}

yltabbardelegate 。

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-( void )tabbar:(yltabbar *)tabbar clickcenterbutton:(uibutton *)sender{
  uialertcontroller *alert = [uialertcontroller alertcontrollerwithtitle:@ "提示" message:@ "点击了中间按钮" preferredstyle:uialertcontrollerstylealert];
  uialertaction *action = [uialertaction actionwithtitle:@ "ok" style:uialertactionstylecancel handler:^(uialertaction * _nonnull action) {
 
  // todo
  }];
  [alert addaction:action];
  [self presentviewcontroller:alert animated:yes completion:nil];
}

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原文链接:https://blog.csdn.net/NLYNN/article/details/83537630 。

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