Variable string insertion Delete re-assignment replace prefix length

#import <Foundation/Foundation.h>

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

@autoreleasepool {

NSString Parent class nsmutablestring variable string subclass

Nsmutablestring *mustr=[[nsmutablestring Alloc]init];

Nsmutablestring *mustr1=[nsmutablestring stringwithformat:@ "Hello"];

Place immutable strings inside a mutable string

NSString *[email protected] "Welcome to OC";

Mustr=[nsmutablestring STRINGWITHSTRING:STR];

Insert

[Mustr insertstring:@ "Students" atindex:7];

[Mustr appendstring:@ "Teacher"];

[Mustr appendformat:@ "second pass insert:%@", str];

Delete

[Mustr Deletecharactersinrange:nsmakerange (8, 10)];

Find and delete

Nsrange rang=[mustr rangeofstring:@ "second pass insert: Welcome to OC"];

if (rang.location!=nsnotfound) {

[Mustr Deletecharactersinrange:rang];

}

Re-assign Value

[Mustr SETSTRING:STR];

Replace

Nsrange rang1=[mustr rangeofstring:@ "OC"];

[Mustr replacecharactersinrange:rang1 withstring:@ "IOS"];

NSLog (@ "%@", mustr);

Determines whether a string has a prefix

NSString *[email protected] "ios8-Zhao Yuxin. jpg";

BOOL result = [str hasprefix:@ "IOS"];

NSLog (@ "%d", result);

Determines whether a string has a suffix

BOOL Resultsu = [str hassuffix:@ ". jpg"];

NSLog (@ "%d", Resultsu);

Length

1. Defining a String Object

NSString *str=[nsstring stringwithstring:@ "Zi fu Chuan"];

2. Calculating string Lengths

Nsuinteger len = [str length];

3. Output string length

NSLog (@ "Zi fu chuan length is%ld", Len);

}

return 0;

}

Variable string insertion Delete re-assignment replace prefix length