1 // UIView+addsubview.h2 3 @interface UIView (addsubview)4 @property (nonatomic,assign) NSInteger sort;5 - (void)addsubviewBysort:(UIView *)newView ;6 7 @end

 1 //UIView+addsubview.m 2  3 #import "UIView+addsubview.h" 4 #import <objc/runtime.h> 5 @implementation UIView (addsubview) 6 - (void)setSort:(NSInteger)sort{ 7  objc_setAssociatedObject(self, @selector(setSort:), @(sort), OBJC_ASSOCIATION_ASSIGN); 8 } 9 10 - (NSInteger)sort{11 NSNumber *num = objc_getAssociatedObject(self, @selector(setSort:));12 return num.integerValue;13 }14 15 - (void)addsubviewBysort:(UIView *)newView {16 BOOL bInsert = NO;17 for (NSInteger i = self.subviews.count - 1; i >= 0 ; i--) {18 UIView *subview = [self.subviews objectAtIndex:i];19 if (subview.sort <= newView.sort) {20 bInsert = YES;21 NSLog(@"lz--insert->%li---on:%li",(long)newView.sort,(long)subview.sort);22  [self insertSubview:newView aboveSubview:subview ];23 break;24  }25  }26 if (bInsert == NO) {27 NSLog(@"lz--below all->%li",(long)newView.sort);28 [self insertSubview:newView atIndex:0];29  }30 }31 32 - (NSInteger)getMaxSort{33 NSInteger maxSort = 0;34 for (UIView *subview in self.subviews) {35 if (maxSort < subview.sort) {36 maxSort = subview.sort;37  }38  }39 return maxSort;40 }41 @end

 1 - (void)test{ 2 for (int i = 100; i > 0; i--) { 3 dispatch_async(dispatch_get_main_queue(), ^{ 4 UIView *view = [UIView new]; 5 view.sort = arc4random()%100; 6  [self.view addsubviewBysort:view]; 7  }); 8  } 9 10 11 dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(2 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{12 for (UIView *subview in self.view.subviews) {13 NSLog(@"lz-->%li",(long)subview.sort);14  }15  });16 17 }