IOS string processor _ Replace (remove space line breaks), intercept, and ios line breaks

IOS string processor _ Replace (remove space line breaks), intercept, and ios line breaks

The following code mainly implements: 1. Extract the string before "@"; 2. Remove "#" from the string; 3. Remove spaces and line breaks from the string.

Hope to learn from each other and correct each other.

 

----- ViewController. m content :------

 

# Import "ViewController. h"

# Import "HandleString. h"

 

@ Interface ViewController ()

{

NSString * _ str;

NSString * _ tempStr;

UILabel * _ label;

}

@ End

 

@ Implementation ViewController

 

-(Void) viewDidLoad {

[Super viewDidLoad];

# Pragma ----- 1. Intercept the content above @ 2. Remove #3. Remove the space and line feed

_ Str = @ "# ## \ n moonlight in front of bed \ n # suspect # ground frost \ n raise your head @ \ n bow to your hometown ";

_ TempStr = _ str;

[Self createSubview];

}

 

-(Void) createSubview {

_ Label = [[UILabel alloc] init];

CGRect temp = self. view. frame;

Temp. origin. x + = 20;

Temp. origin. y + = 80;

Temp. size. width-= 40;

Temp. size. size = 150;

_ Label. frame = temp;

_ Label. textAlignment = NSTextAlignmentCenter;

_ Label. lineBreakMode = NSLineBreakByWordWrapping;

_ Label. numberOfLines = 0;

_ Label. text = _ str;

_ Label. textColor = [UIColor greenColor];

_ Label. backgroundColor = [[UIColor blueColor] colorWithAlphaComponent: 0.3];

[Self. view addSubview: _ label];

For (NSInteger I = 0; I <4; I ++ ){

UIButton * btn = [UIButton buttonWithType: UIButtonTypeSystem];

Btn. frame = CGRectMake (0, CGRectGetMaxY (_ label. frame) + 50 * (I + 1), 150, 40 );

CGRect a = btn. frame;

A. origin. x = self. view. center. x-a. size. width/2;

Btn. frame =;

Btn. backgroundColor = [UIColor cyanColor];

NSArray * arr = @ [@ "intercept @ content above", @ "Remove ##", @ "remove space and line feed", @ "Restore"];

[Btn setTitle: arr [I] forState: UIControlStateNormal];

Btn. tag = 10 + I; // The tag values are 10, 11, 12, and 13, respectively.

[Btn addTarget: self action: @ selector (click :) forControlEvents: UIControlEventTouchUpInside];

[Self. view addSubview: btn];

}

}

 

-(Void) click :( UIButton *) button {

NSInteger x = button. tag;

Switch (x ){

Case 10:

_ TempStr = [HandleString handleString: _ tempStr interceptFrom: nil to: @ "@"];

Break;

Case 11:

_ TempStr = [HandleString handleString: _ tempStr replace: @ "#" with: @ ""];

Break;

Case 12:

_ TempStr = [HandleString delSpaceAndNewline: _ tempStr];

Break;

Case 13:

_ TempStr = _ str;

Break;

Default:

Break;

}

_ Label. text = _ tempStr;

}

 

-(Void) didReceiveMemoryWarning {

[Super didReceiveMemoryWarning];

// Dispose of any resources that can be recreated.

}

 

@ End

 

 

------ HandleString. h :---------

# Import <Foundation/Foundation. h>

 

@ Interface HandleString: NSObject

 

// Replace str1 with str2

+ (NSString *) handleString :( NSString *) string replace :( NSString *) str1 with :( NSString *) str2;

 

// Extract the string from str1 (included) to str2 (not included)

+ (NSString *) handleString :( NSString *) string interceptFrom :( NSString *) str1 to :( NSString *) str2;

 

// Remove spaces and line breaks from the string

+ (NSString *) delSpaceAndNewline :( NSString *) string;

 

@ End

------ HandleString. m :---------

# Import "HandleString. h"

 

@ Implementation HandleString

 

+ (NSString *) delSpaceAndNewline :( NSString *) string ;{

 

NSMutableString * mutStr = [NSMutableString stringWithString: string];

Nsange range = {0, mutStr. length };

[MutStr replaceOccurrencesOfString: @ "" withString: @ "" options: NSLiteralSearch range: range];

Nsange range2 = {0, mutStr. length };

[MutStr replaceOccurrencesOfString: @ "\ n" withString: @ "" options: NSLiteralSearch range: range2];

Return mutStr;

// String = [string stringByTrimmingCharactersInSet: [NSCharacterSet whitespaceAndNewlineCharacterSet]; // remove the leading and trailing spaces and line breaks

// String = [string stringByReplacingOccurrencesOfString: @ "" withString: @ ""];

// String = [string stringByReplacingOccurrencesOfString: @ "\ n" withString: @ ""];

// Return string;

}

 

# Pragma ----- replace str1 with str2 if the string contains str1.

+ (NSString *) handleString :( NSString *) string replace :( NSString *) str1 with :( NSString *) str2 ;{

If (str2 = nil ){

Str2 = @"";

}

/// Method 1

// NSMutableString * tempStr = [NSMutableString stringWithString: string];

// Nsange range = {0, tempStr. length };

// [TempStr replaceOccurrencesOfString: str1 withString: str2 options: NSLiteralSearch range: range];

// Return tempStr;

/// Method 2

// String = [string stringByReplacingOccurrencesOfString: str1 withString: str2];

// Return string;

// Method 3

NSArray * array = [string componentsSeparatedByString: str1];

NSInteger count = [array count]-1;

NSMutableString * tempStr = [NSMutableString stringWithString: string];

For (NSInteger I = 0; I <count; I ++ ){

Nsange range = [tempStr rangeOfString: str1];

NSInteger location = range. location;

NSInteger length = range. length;

If (location! = NSNotFound ){

[TempStr replaceCharactersInRange: NSMakeRange (location, length) withString: str2];

}

}

Return tempStr;

}

 

 

# Pragma ------ truncate str1 from string to str2

+ (NSString *) handleString :( NSString *) string interceptFrom :( NSString *) str1 to :( NSString *) str2 ;{

If (str1 = nil ){

Str1 = @"";

}

If (str2 = nil ){

Str2 = @"";

}

Nsange range1 = [string rangeOfString: str1];

NSInteger location1 = range1.location;

If (location1! = NSNotFound ){

String = [string substringFromIndex: location1];

}

Nsange range2 = [string rangeOfString: str2];

NSInteger location2 = range2.location;

If (location2! = NSNotFound ){

String = [string substringToIndex: location2];

}

Return string;

}

 

 

@ End

 

END