iOS source code download: Implementing custom drawing functions

Supported platforms: iOS

Operating environment: iOS

Development language: Object-C

Development tools: Xcode

Source code size: 166.12KB

Source code download address: http://down..com/data/1975550

Source code introduction

A customizable drawing function is implemented, which can dynamically select the pen color, line thickness, etc.

Source code running screenshot

Rendering

Source code snippet

 - (id)initWithFrame:(CGRect)frame afterToolColor:(ToolColorBlock)toolcolor
 {
    _toolColorBlock = toolcolor;
    self = [super initWithFrame:frame];
 if (self) {
        self.backgroundColor = [UIColor lightGrayColor];
        _colorArray = [NSArray array];
        NSArray *array = @[[UIColor darkGrayColor],
                           [UIColor redColor],
                           [UIColor greenColor],
                           [UIColor blueColor],
                           [UIColor yellowColor],
                           [UIColor orangeColor],
                           [UIColor purpleColor],
                           [UIColor brownColor],
                           [UIColor blackColor]]; 
  
 _colorArray = array;
        [self creatColorButtons:array];
 }
 return self;
 } 
  
 - ( void )creatColorButtons:(NSArray *)array
 {
    NSInteger count = array.count;
    CGFloat buttonW = (self.bounds.size.width - (array.count+1)*kButtonSpace)/count;
    CGFloat buttonH = self.bounds.size.height;
 for (NSInteger i = 0; i<array.count; i++)= "" {= "" uicolor= "" *color= "array[i];" uibutton= "" *button= "[UIButton" buttonwithtype:uibuttontypecustom];= "" button.tag= "i;" [button= "" addtarget:self= "" action:@selector(tagbutton:)= "" forcontrolevents:uicontroleventtouchupinside];= "" cgfloat= "" buttonx= "kButtonSpace" += "" i= "" *= "" (buttonw= "" +kbuttonspace);= "" button.frame= "CGRectMake(buttonX," 5,= "" buttonw,= "" buttonh-10);= "" setbackgroundcolor:color];= "" [self= "" addsubview:button];= "" }= "" -= "" ( void )tagbutton:(uibutton= "" *)button= "" [uiview= "" animatewithduration:0.5f= "" animations:^{= "" self.frame= "CGRectMake(0," -self.bounds.size.height,= "" 320,= "" 44);= "" }];= "" _toolcolorblock(_colorarray[button.tag]);= "" }<= "" pre= "" > 
                      
                </array.count;>

Source code download address: http://down..com/data/1975550