ios 11和iphone x的相关适配问题及解决方法

有关ios11 ,最大的变化就是增加了一个安全区域（safearea）的概念，ios11 适配的大部分问题都是由于它引起的。

在ios 11中，tableview会莫名偏移，解决办法：

//解决ios11 tableview会出现漂移,预估高度都设为0 
 self.tableview.estimatedrowheight = 0; 
 self.tableview.estimatedsectionheaderheight = 0; 
 self.tableview.estimatedsectionfooterheight = 0; 

解决scrollview，默认位移了，解决办法：

-(void)setscrollviewcontentinsetadjustmentbehavior:(uiscrollview *)scrollview { 
#if __iphone_os_version_max_allowed >= 110000 
 if(@available(ios 11.0, *)) { 
  if ([scrollview respondstoselector:@selector(setcontentinsetadjustmentbehavior:)]) { 
   scrollview.contentinsetadjustmentbehavior = uiscrollviewcontentinsetadjustmentnever; 
  } 
 } 
#endif 
} 

关于iphone x适配，封装了一个类：代码如下：

screentool.h

#import <foundation/foundation.h> 
#import <uikit/uikit.h> 
#define viewsafeareainsets(view) [screentoolsharedinstance getviewsafeareainsets:view] 
#define windowsafeareainsets [screentoolsharedinstance getwindowsafeareainsets] 
#define screen_height [[uiscreen mainscreen] bounds].size.height 
#define screen_width [[uiscreen mainscreen] bounds].size.width 
#define screentoolsharedinstance [screentool sharedinstance] 
#define navandstatusbarheight [screentoolsharedinstance getnavandstatusbarheight] 
#define tabbarandvirtualhomeheight [screentoolsharedinstance gettabbarandvirtualhomeheight] 
#define statusbarheight [screentoolsharedinstance getstatusbarheight] 
#define navcontentheight [screentoolsharedinstance getnavcontentheight] 
#define tabbarcontentheight [screentoolsharedinstance gettabbarcontentheight] 
#define scrollviewcontentinsetadjustmentbehavior(scrollview) [screentoolsharedinstance setscrollviewcontentinsetadjustmentbehavior:scrollview] 
typedef ns_enum(nsuinteger, devicescreentype) {//设备屏幕类型 
 devicetypeiphone4screen, 
 devicetypeiphone5screen, 
 devicetypeiphone6screen, 
 devicetypeiphone6plusscreen, 
 devicetypeiphonexscreen, 
 devicetypeotherscreen 
}; 
typedef ns_enum(nsuinteger, deviceorientationtype) {//屏幕方向类型 
 deviceorientationtypehorizontalscreen, 
 deviceorientationtypeverticalscreen, 
 deviceorientationtypeother 
}; 
@interface screentool : nsobject 
@property(nonatomic,unsafe_unretained)bool isaccordingtosafearea; 
-(void)setscrollviewcontentinsetadjustmentbehavior:(uiscrollview *)scrollview; 
+(screentool *)sharedinstance; 
+(bool)issmallscreen; 
-(uiedgeinsets)getwindowsafeareainsets; 
-(uiedgeinsets)getviewsafeareainsets:(uiview *)view; 
-(nsstring *)getdevice; 
-(devicescreentype)getdevicetype; 
-(deviceorientationtype)getdeviceorientationtype; 
-(cgfloat)getnavandstatusbarheight; 
-(cgfloat)gettabbarandvirtualhomeheight; 
-(cgfloat)gettabbarcontentheight; 
-(cgfloat)getnavcontentheight; 
-(cgfloat)getstatusbarheight; 
@end 
screentool.m
[objc] view plain copy
#import "screentool.h" 
@implementation screentool 
-(instancetype)init{ 
 if (self = [super init]) { 
  self.isaccordingtosafearea = yes; 
 } 
 return self; 
} 
+(screentool *)sharedinstance { 
 static dispatch_once_t pred = 0; 
 __strong static id screentool = nil; 
 dispatch_once(&pred, ^{ 
  screentool = [[self alloc] init]; 
 }); 
 return screentool; 
} 
-(void)setscrollviewcontentinsetadjustmentbehavior:(uiscrollview *)scrollview { 
#if __iphone_os_version_max_allowed >= 110000 
 if(@available(ios 11.0, *)) { 
  if ([scrollview respondstoselector:@selector(setcontentinsetadjustmentbehavior:)]) { 
   scrollview.contentinsetadjustmentbehavior = uiscrollviewcontentinsetadjustmentnever; 
  } 
 } 
#endif 
} 
-(uiedgeinsets)getwindowsafeareainsets { 
 uiedgeinsets i = uiedgeinsetszero; 
#if __iphone_os_version_max_allowed >= 110000 
 if(@available(ios 11.0, *)) { 
  i = [uiapplication sharedapplication].keywindow.safeareainsets; 
 } 
#endif 
 return i; 
} 
-(uiedgeinsets)getviewsafeareainsets:(uiview *)view { 
 uiedgeinsets i = uiedgeinsetszero; 
#if __iphone_os_version_max_allowed >= 110000 
 if(@available(ios 11.0, *)) { 
  i = view.safeareainsets; 
 } 
#endif 
 return i; 
} 
-(nsstring *)getdevice { 
 if ((screen_width == 320 && screen_height == 480) || (screen_height == 320 && screen_width == 480)) { 
  return @"4"; 
 }else if ((screen_width == 320 && screen_height == 568) || (screen_height == 320 && screen_width == 568)) { 
  return @"5"; 
 }else if ((screen_width == 375 && screen_height == 667) || (screen_height == 375 && screen_width == 667)) { 
  return @"6"; 
 }else if ((screen_width == 375 && screen_height == 812) || (screen_height == 375 && screen_width == 812)) { 
  return @"x"; 
 }else if ((screen_width == 414 && screen_height == 736) || (screen_height == 414 && screen_width == 736)) { 
  return @"6p"; 
 }else { 
  return @""; 
 } 
} 
-(devicescreentype)getdevicetype { 
 if ((screen_width == 320 && screen_height == 480) || (screen_height == 320 && screen_width == 480)) { 
  return devicetypeiphone4screen; 
 }else if ((screen_width == 320 && screen_height == 568) || (screen_height == 320 && screen_width == 568)) { 
  return devicetypeiphone5screen; 
 }else if ((screen_width == 375 && screen_height == 667) || (screen_height == 375 && screen_width == 667)) { 
  return devicetypeiphone6screen; 
 }else if ((screen_width == 375 && screen_height == 812) || (screen_height == 375 && screen_width == 812)) { 
  return devicetypeiphonexscreen; 
 }else if ((screen_width == 414 && screen_height == 736) || (screen_height == 414 && screen_width == 736)) { 
  return devicetypeiphone6plusscreen; 
 }else { 
  return devicetypeotherscreen; 
 } 
} 
-(deviceorientationtype)getdeviceorientationtype { 
 if ([[uidevice currentdevice] orientation] == uideviceorientationportrait || [[uidevice currentdevice] orientation] == uideviceorientationportraitupsidedown) { 
  return deviceorientationtypeverticalscreen; 
 } else if ([[uidevice currentdevice] orientation] == uideviceorientationlandscapeleft || [[uidevice currentdevice] orientation] == uideviceorientationlandscaperight) { 
  return deviceorientationtypehorizontalscreen; 
 }else { 
  return deviceorientationtypeother; 
 } 
} 
+(bool)issmallscreen{ 
 if (screen_width >=375 && screen_height >= 667) { 
  return no; 
 }else { 
  return yes; 
 } 
} 
-(cgfloat)gettabbarcontentheight { 
 if (!uiedgeinsetsequaltoedgeinsets(uiedgeinsetszero, windowsafeareainsets)) { 
  //if ([self getdevicetype] == devicetypeiphonexscreen) { 
  if ([self getdeviceorientationtype] == deviceorientationtypehorizontalscreen) { 
   if (self.isaccordingtosafearea) { 
    return 32; 
   }else { 
    return 49; 
   } 
  }else { 
   return 49; 
  } 
 }else { 
  return 49; 
 } 
} 
-(cgfloat)getnavcontentheight { 
 if (!uiedgeinsetsequaltoedgeinsets(uiedgeinsetszero, windowsafeareainsets)) { 
  // } 
  // if ([self getdevicetype] == devicetypeiphonexscreen) { 
  if ([self getdeviceorientationtype] == deviceorientationtypehorizontalscreen) { 
   if (self.isaccordingtosafearea) { 
    return 32; 
   }else { 
    return 44; 
   } 
  }else { 
   return 44; 
  } 
 }else { 
  return 44; 
 } 
} 
-(cgfloat)getstatusbarheight { 
 return [[uiapplication sharedapplication] statusbarframe].size.height; 
} 
-(cgfloat)getnavandstatusbarheight { 
 return [self getnavcontentheight]+[self getstatusbarheight]; 
} 
-(cgfloat)gettabbarandvirtualhomeheight { 
 return [self gettabbarcontentheight]+windowsafeareainsets.bottom; 
} 
@end 

总结

以上所述是小编给大家介绍的ios 11和iphone x的相关适配问题及解决方法，希望对大家有所帮助