UIBezierPath多行顏色

Question

我嘗試使用不同的顏色繪製UIBezierPath行會讓我失望。所有線都變爲當前選擇的顏色。我所有的路徑和信息都存儲在一個名爲pathInfo的NSMutableArray中。在路徑信息中，我放入包含路徑，顏色，寬度和類型行的數組中。這工作正常，除了所有的行都變成用戶選擇的顏色。我會很感激任何幫助！

- (void)drawRect:(CGRect)rect { 
    UIBezierPath *drawPath = [UIBezierPath bezierPath]; 
    drawPath.lineCapStyle = kCGLineCapRound; 
    drawPath.miterLimit = 0; 

    for (int i = 0; i < [pathInfo count]; i++){ 
     NSArray *row = [[NSArray alloc] initWithArray:[pathInfo objectAtIndex:i]]; 
     NSLog(@"Path: %@",[row objectAtIndex:0]); 
     NSLog(@"Color: %@",[row objectAtIndex:1]); 
     NSLog(@"Width: %@",[row objectAtIndex:2]); 
     NSLog(@"Type: %@",[row objectAtIndex:3]); 

     //width 
     drawPath.lineWidth = [[row objectAtIndex:2] floatValue]; 

     //color 
     [[row objectAtIndex:1] setStroke]; 

     //path 
     [drawPath appendPath:[row objectAtIndex:0]]; 

    } 

    UIBezierPath *path = [self pathForCurrentLine]; 
    if (path) 
    [drawPath appendPath:path]; 

    [drawPath stroke]; 
} 

- (UIBezierPath*)pathForCurrentLine { 
    if (CGPointEqualToPoint(startPoint, CGPointZero) && CGPointEqualToPoint(endPoint, CGPointZero)){ 
     return nil; 
    } 

    UIBezierPath *path = [UIBezierPath bezierPath]; 
    [path moveToPoint:startPoint]; 
    [path addLineToPoint:endPoint]; 

    return path; 

} 

Answer 1

筆觸/填充顏色隻影響-stroke命令。它們不影響-appendPath:命令。路徑不包含每段顏色信息。

如果您需要多色線條，則需要分別對每種顏色進行筆觸。

Answer 2

設置你的筆觸顏色（和你有什麼），然後stroke，然後移動到下一個路徑：

- (void)drawRect:(CGRect)rect 
{ 
    for (int i = 0; i < [pathInfo count]; i++){ 
     NSArray *row = [[NSArray alloc] initWithArray:[pathInfo objectAtIndex:i]]; 

     NSLog(@"Path: %@",[row objectAtIndex:0]); 
     NSLog(@"Color: %@",[row objectAtIndex:1]); 
     NSLog(@"Width: %@",[row objectAtIndex:2]); 
     NSLog(@"Type: %@",[row objectAtIndex:3]); 

     UIBezierPath *path = [row objectAtIndex:0]; 

     path.lineCapStyle = kCGLineCapRound; 
     path.miterLimit = 0; 

     //width 
     path.lineWidth = [[row objectAtIndex:2] floatValue]; 

     //color 
     [[row objectAtIndex:1] setStroke]; 

     //path 
     [path stroke]; 
    } 

    UIBezierPath *path = [self pathForCurrentLine]; 
    if (path) 
    { 
     // set the width, color, etc, too, if you want 
     [path stroke]; 
    } 
}