NSMutableString常见的用法 - 黑马程序员技术交流社区

#import <Foundation/Foundation.h>
int main(int argc, const char * argv[]) {
@autoreleasepool {
//格式化延展
//appendFormat
NSMutableString *str1=[NSMutableString string];
[str1 appendFormat:@"jpg%d",10];
//删除range.location处range.lenth长度字符串
//-(void)deleteCharactersInRange:(NSRange)range;
NSMutableString *str2=[NSMutableString stringWithFormat:@"Lazy&jiangkeshanshan"];
NSRange range=[str2 rangeOfString:@"jiangke"];
[str2 deleteCharactersInRange:range];
NSLog(@"%@",str2);
//在location位置插入一个字符串
//-(void)insertString:(NSString *)aString atIndex:(NSUInteger)loc;
NSMutableString *str3=[NSMutableString stringWithFormat:@"lazy&"];
NSRange range1=[str3 rangeOfString:@"&"];
[str3 insertString:@"shanshan" atIndex:range1.location+1];
NSLog(@"%@",str3);
//使用aString替换range范围内字符串
//-(void)replaceCharactersInRange:(NSRange)range withString:(NSString *)aString
NSMutableString *str4=[NSMutableString stringWithFormat:@"lazy&miandian"];
NSRange range2=[str4 rangeOfString:@"miandian"];
[str4 replaceCharactersInRange:range2 withString:@"shanshan"];
NSLog(@"%@",str4);
//错误1:给可变字符串赋值了不可变内容
// NSMutableString *str5=@"adb";
//错误2:给str的string属性设为空
// NSMutableString *str5=@"abc";
// str5.string=@"";
}
return 0;
}

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