#import <Foundation/Foundation.h>

#import <stdio.h>

#import <objc/runtime.h>

void handlePrintingOfProperties(void){

unsigned int count;// 记录属性个数

objc_property_t *properties = class_copyPropertyList([NSString class], &count);

// 生成一个属性名称组成的数组

NSMutableArray *propertyNameArray = [NSMutableArray array];

for (int i = 0; i < count; i++) {

// An opaque type that represents an Objective-C declared property.

// objc_property_t 属性类型

objc_property_t property = properties[i];

// 获取属性的名称 C语言字符串

const char *cName = property_getName(property);

// 转换为Objective C 字符串

NSString *name = [NSString stringWithCString:cName encoding:NSUTF8StringEncoding];

[propertyNameArray addObject:name];

}

NSLog(@"排序前的属性列表 = %@",propertyNameArray);

NSComparator cmptr = ^(NSString *obj1, NSString *obj2){

return [obj1 compare:obj2 options:NSLiteralSearch];

};

NSArray *afterSort = [propertyNameArray sortedArrayUsingComparator:cmptr];

NSLog(@"排序后的属性列表 = %@",afterSort);

//C语言中,用完copy,create的东西之后,最好释放

free(properties);

}

void handlePrintingOfIvars(void){

unsigned int count;// 记录属性个数

Ivar *properties = class_copyIvarList([NSURL class], &count);

// 生成一个属性名称组成的数组

NSMutableArray *propertyNameArray = [NSMutableArray array];

for (int i = 0; i < count; i++) {

// An opaque type that represents an Objective-C declared property.

// objc_property_t 属性类型

Ivar property = properties[i];

// 获取属性的名称 C语言字符串

const char *cName = ivar_getName(property);

// 转换为Objective C 字符串

NSString *name = [NSString stringWithCString:cName encoding:NSUTF8StringEncoding];

[propertyNameArray addObject:name];

}

NSLog(@"排序前的成员变量列表 = %@",propertyNameArray);

NSComparator cmptr = ^(NSString *obj1, NSString *obj2){

return [obj1 compare:obj2 options:NSLiteralSearch];

};

NSArray *afterSort = [propertyNameArray sortedArrayUsingComparator:cmptr];

NSLog(@"排序后的成员变量列表 = %@",afterSort);

//C语言中,用完copy,create的东西之后,最好释放

free(properties);

}

void handleSortingForStrArray(void){

NSArray *stringsArray = [NSArray arrayWithObjects:

@"string b",

@"string A",

@"string a",

@"string \uFF41",

@"string a",

@"string A",

@"string c",

@"string d0030",

@"string d2",

@"アいろはｱｲｳｴイウエ",

@"ｱいろはｱｲｳｴｲｳｴ",

@"アいろはｱｲｳｴイウエ",nil];

NSStringCompareOptions comparisonOptions = NSNumericSearch|NSWidthInsensitiveSearch|NSForcedOrderingSearch;

NSLocale *currentLocale = [NSLocale currentLocale];

NSComparator finderSortBlock = ^(id string1,id string2) {

NSRange string1Range =NSMakeRange(0, [string1 length]);

return [string1 compare:string2 options:comparisonOptions range:string1Range locale:currentLocale];

};

NSArray *finderSortArray = [stringsArray sortedArrayUsingComparator:finderSortBlock];

NSLog(@"finderSortArray: %@", finderSortArray);

}

void handleSortingForIntStrArray(void){

NSArray *originalArray = @[@"00",@"0",@"00",@"01",@"10",@"21",@"12",@"11",@"22"];

//block比较方法，数组中可以是NSInteger，NSString（需要转换）

NSComparator finderSort = ^(id string1,id string2){

if ([string1 integerValue] > [string2 integerValue]) {

return (NSComparisonResult)NSOrderedDescending;

}else if ([string1 integerValue] < [string2 integerValue]){

return (NSComparisonResult)NSOrderedAscending;

}else{

return (NSComparisonResult)NSOrderedSame;

}

};

//数组排序：

NSArray *resultArray = [originalArray sortedArrayUsingComparator:finderSort];

NSLog(@"第一种排序结果：%@",resultArray);

}

int main(int argc, const char * argv[]) {

@autoreleasepool {

// insert code here...

NSLog(@"handlePrintingOfIvars()**********************");

handlePrintingOfIvars();

}

return 0;

}