当前位置：首页 > news >正文

iOS7 navigation BarButtonItem 多余的空白的解决方案

news 来源：原创 2024/5/9 7:45:30

https://github.com/lemonlabs/UINavigationItem-iOS7Spacing

实现：

 
  #import "UINavigationItem+iOS7Spacing.h"
 
 
  #import <objc/runtime.h>
 
 
  

 
 
  @implementation 
  UINavigationItem 
  (iOS7Spacing)
 
 
  

 
 
  - 
  (
  BOOL
  )
  isIOS7
 
 
  {
 
 
      
  return 
  ([[[
  UIDevice 
  currentDevice
  ] 
  systemVersion
  ] 
  compare
  :
  @"7" 
  options
  :
  NSNumericSearch
  ] 
  != 
  NSOrderedAscending
  );
 
 
  }
 
 
  

 
 
  - 
  (
  UIBarButtonItem 
  *
  )
  spacer
 
 
  {
 
 
      
  UIBarButtonItem 
  *
  space 
  = 
  [[
  UIBarButtonItem 
  alloc
  ] 
  initWithBarButtonSystemItem
  :
  UIBarButtonSystemItemFixedSpace 
  target
  :
  nil 
  action
  :
  nil
  ];
 
 
      
  space
  .
  width 
  = 
  -
  11
  ;
 
 
      
  return 
  space
  ;
 
 
  }
 
 
  

 
 
  - 
  (
  void
  )
  mk_setLeftBarButtonItem:
  (
  UIBarButtonItem 
  *
  )
  leftBarButtonItem
 
 
  {
 
 
      
  if 
  ([
  self 
  isIOS7
  ] 
  && 
  leftBarButtonItem
  ) 
  {
 
 
          
  [
  self 
  mk_setLeftBarButtonItem
  :
  nil
  ];
 
 
          
  [
  self 
  mk_setLeftBarButtonItems
  :
  @[
  [
  self 
  spacer
  ], 
  leftBarButtonItem
  ]
  ];
 
 
      
  } 
  else 
  {
 
 
          
  if 
  ([
  self 
  isIOS7
  ]) 
  {
 
 
              
  [
  self 
  mk_setLeftBarButtonItems
  :
  nil
  ];
 
 
          
  }
 
 
          
  [
  self 
  mk_setLeftBarButtonItem
  :
  leftBarButtonItem
  ];
 
 
      
  }
 
 
  }
 
 
  

 
 
  - 
  (
  void
  )
  mk_setLeftBarButtonItems:
  (
  NSArray 
  *
  )
  leftBarButtonItems
 
 
  {
 
 
      
  if 
  ([
  self 
  isIOS7
  ] 
  && 
  leftBarButtonItems 
  && 
  leftBarButtonItems
  .
  count 
  > 
  0
  ) 
  {
 
 
          
 
 
          
  NSMutableArray 
  *
  items 
  = 
  [[
  NSMutableArray 
  alloc
  ] 
  initWithCapacity
  :
  leftBarButtonItems
  .
  count 
  + 
  1
  ];
 
 
          
  [
  items 
  addObject
  :[
  self 
  spacer
  ]];
 
 
          
  [
  items 
  addObjectsFromArray
  :
  leftBarButtonItems
  ];
 
 
          
 
 
          
  [
  self 
  mk_setLeftBarButtonItems
  :
  items
  ];
 
 
      
  } 
  else 
  {
 
 
          
  [
  self 
  mk_setLeftBarButtonItems
  :
  leftBarButtonItems
  ];
 
 
      
  }
 
 
  }
 
 
  

 
 
  - 
  (
  void
  )
  mk_setRightBarButtonItem:
  (
  UIBarButtonItem 
  *
  )
  rightBarButtonItem
 
 
  {
 
 
      
  if 
  ([
  self 
  isIOS7
  ] 
  && 
  rightBarButtonItem
  ) 
  {
 
 
          
  [
  self 
  mk_setRightBarButtonItem
  :
  nil
  ];
 
 
          
  [
  self 
  mk_setRightBarButtonItems
  :
  @[
  [
  self 
  spacer
  ], 
  rightBarButtonItem
  ]
  ];
 
 
      
  } 
  else 
  {
 
 
          
  if 
  ([
  self 
  isIOS7
  ]) 
  {
 
 
              
  [
  self 
  mk_setRightBarButtonItems
  :
  nil
  ];
 
 
          
  }
 
 
          
  [
  self 
  mk_setRightBarButtonItem
  :
  rightBarButtonItem
  ];
 
 
      
  }
 
 
  }
 
 
  

 
 
  - 
  (
  void
  )
  mk_setRightBarButtonItems:
  (
  NSArray 
  *
  )
  rightBarButtonItems
 
 
  {
 
 
      
  if 
  ([
  self 
  isIOS7
  ] 
  && 
  rightBarButtonItems 
  && 
  rightBarButtonItems
  .
  count 
  > 
  0
  ) 
  {
 
 
          
 
 
          
  NSMutableArray 
  *
  items 
  = 
  [[
  NSMutableArray 
  alloc
  ] 
  initWithCapacity
  :
  rightBarButtonItems
  .
  count 
  + 
  1
  ];
 
 
          
  [
  items 
  addObject
  :[
  self 
  spacer
  ]];
 
 
          
  [
  items 
  addObjectsFromArray
  :
  rightBarButtonItems
  ];
 
 
          
 
 
          
  [
  self 
  mk_setRightBarButtonItems
  :
  items
  ];
 
 
      
  } 
  else 
  {
 
 
          
  [
  self 
  mk_setRightBarButtonItems
  :
  rightBarButtonItems
  ];
 
 
      
  }
 
 
  }
 
 
  

 
 
  + 
  (
  void
  )
  mk_swizzle:
  (
  SEL
  )
  aSelector
 
 
  {
 
 
      
  SEL 
  bSelector 
  = 
  NSSelectorFromString
  ([
  NSString 
  stringWithFormat
  :
  @"mk_%@"
  , 
  NSStringFromSelector
  (
  aSelector
  )]);
 
 
      
 
 
      
  Method 
  m1 
  = 
  class_getInstanceMethod
  (
  self
  , 
  aSelector
  );
 
 
      
  Method 
  m2 
  = 
  class_getInstanceMethod
  (
  self
  , 
  bSelector
  );
 
 
      
 
 
      
  method_exchangeImplementations
  (
  m1
  , 
  m2
  );
 
 
  }
 
 
  

 
 
  + 
  (
  void
  )
  load
 
 
  {
 
 
      
  [
  self 
  mk_swizzle
  :
  @selector
  (
  setLeftBarButtonItem
  :)];
 
 
      
  [
  self 
  mk_swizzle
  :
  @selector
  (
  setLeftBarButtonItems
  :)];
 
 
      
  [
  self 
  mk_swizzle
  :
  @selector
  (
  setRightBarButtonItem
  :)];
 
 
      
  [
  self 
  mk_swizzle
  :
  @selector
  (
  setRightBarButtonItems
  :)];
 
 
  }
 
 
  

 
 
  @end