每个单词的首字母转成大写

//
//  main.m
//  每个单词的首字母转成大写
//
//  Created by yaomars on 16/4/28.
//  Copyright © 2016年 yaomars. All rights reserved.
//

#import <Foundation/Foundation.h>

//	给一个英文句子，把每个单词的首字母转成大写

int main(int argc, const char * argv[]) {
    @autoreleasepool {
    
        NSString *sentenceStr = @"  sweet   are The uses of adversity";
        //定义一个可变数组用来存储字符串中的每一个字符
        NSMutableArray *strArray = [NSMutableArray array];
        for (int i=0; i<[sentenceStr length]; i++) {
            NSString *tempStr = [sentenceStr substringWithRange:NSMakeRange(i, 1)];
            
            [strArray addObject:tempStr];
            
        }
        
        int word = 0;  //判断是否是单词的首字母
        NSMutableString *newString = [NSMutableString string];
        
        for (int j=0; j<[strArray count]; j++) {
            
            if ( [strArray[j] isEqual:@" "] ) {
                
                word = 0;
                
            }else if(word == 0){
                
                word = 1;
                NSString *str = strArray[j];
                const char *ch = [str UTF8String];
                if (*ch >= 'a' && *ch <= 'z') {
                    
                    char tempC = *ch -32;
                    NSString *chStr = [NSString stringWithFormat:@"%c",tempC];
                    
                    strArray[j] = chStr;
                }
            
            }
            
            [newString appendString:[NSString stringWithFormat:@"%@",strArray[j]]];
        }
        
        NSLog(@"新字符串为:%@",newString);
        
    
    }
    return 0;
}