iOS几种简单有效的数组排序方法

//第一种，利用数组的sortedArrayUsingComparator调用 NSComparator ，obj1和obj2指的数组中的对象

NSComparator cmptr = ^(id obj1, id obj2){ if ([obj1 integerValue] > [obj2 integerValue]) {        return (NSComparisonResult)NSOrderedDescending;    }     if ([obj1 integerValue] < [obj2 integerValue]) {        return (NSComparisonResult)NSOrderedAscending;    }    return (NSComparisonResult)NSOrderedSame;};

NSArray *sortArray = [[NSArray alloc] initWithObjects:@"1",@"3",@"4",@"7",@"8",@"2",@"6",@"5",@"13",@"15",@"12",@"20",@"28",@"",nil]; //排序前 NSMutableString *outputBefore = [[NSMutableString alloc] init]; for(NSString *str in sortArray){  [outputBefore appendFormat:@"]; } NSLog(@"排序前:%@",outputBefore); [outputBefore release]; //第一种排序 NSArray *array = [sortArray sortedArrayUsingComparator:cmptr];  NSMutableString *outputAfter = [[NSMutableString alloc] init]; for(NSString *str in array){  [outputAfter appendFormat:@"]; } NSLog(@"排序后:%@",outputAfter); [outputAfter release];

第二种 排序方法 利用sortedArrayUsingFunction 调用 对应方法customSort，这个方法中的obj1和obj2分别是指数组中的对象。NSInteger customSort(id obj1, id obj2,void* context){ if ([obj1 integerValue] > [obj2 integerValue]) {        return (NSComparisonResult)NSOrderedDescending;    }     if ([obj1 integerValue] < [obj2 integerValue]) {        return (NSComparisonResult)NSOrderedAscending;    }    return (NSComparisonResult)NSOrderedSame;}

 NSArray *sortArray = [[NSArray alloc] initWithObjects:@"1",@"3",@"4",@"7",@"8",@"2",@"6",@"5",@"13",@"15",@"12",@"20",@"28",@"",nil]; //排序前 NSMutableString *outputBefore = [[NSMutableString alloc] init]; for(NSString *str in sortArray){  [outputBefore appendFormat:@"]; } NSLog(@"排序前:%@",outputBefore); [outputBefore release];  NSArray *array = [sortArray sortedArrayUsingFunction:customSort context:nil];  NSMutableString *outputAfter = [[NSMutableString alloc] init]; for(NSString *str in array){  [outputAfter appendFormat:@"]; } NSLog(@"排序后:%@",outputAfter); [outputAfter release];

第三种 利用sortUsingDescriptors调用NSSortDescriptor

 NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"price" ascending:NO];//其中，price为数组中的对象的属性，这个针对数组中存放对象比较更简洁方便  NSArray *sortDescriptors = [[NSArray alloc] initWithObjects:&sortDescriptor count:1];  [_totalInfoArray sortUsingDescriptors:sortDescriptors];  [_airListView refreshTable:_totalInfoArray];  [sortDescriptor release];  [sortDescriptors release];

转载于:https://www.cnblogs.com/pengjuwang/p/6126071.html

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