iso 获得UIColor中RGB各个元素的值

iso 获得UIColor中RGB各个元素的值

UIColor *clr = [UIColorcolorWithRed:0.3fgreen:0.4fblue:0.7falpha:0.8f];

CGColorRef clrRef = [clrCGColor];

constCGFloat *components = CGColorGetComponents(clrRef);

NSUInteger componentsCount =CGColorGetNumberOfComponents(clrRef);

NSUInteger counter =0;

for (counter =0; counter < componentsCount; counter++) {

NSLog(@"Component %lu = %.02f", (unsignedlong)counter + 1, components[counter]);

}

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